Powered by Deep Web Technologies
Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Skirted projectiles for railguns  

DOE Patents [OSTI]

A single skirt projectile (20) having an insulating skirt (22) at its rear, or a dual trailing skirt projectile (30, 40, 50, 60) having an insulating skirt (32, 42, 52, 62) succeeded by an arc extinguishing skirt (34, 44, 54, 64), is accelerated by a railgun accelerator 10 having a pair of parallel conducting rails (1a, 1b) which are separated by insulating wall spacers (11). The insulating skirt (22, 32, 42, 52, 62) includes a plasma channel (38). The arc extinguishing skirt (34, 44, 54, 64) interrupts the conduction that occurs in the insulating skirt channel (38) by blocking the plasma arc (3) from conducting current from rail to rail (1a, 1b) at the rear of the projectile (30, 40, 50, 60). The arc extinguishing skirt may be comprised of two plates (36a, 36b) which form a horseshoe wherein the plates are parallel to the rails (1a, b); a chisel-shape design; cross-shaped, or it may be a cylindrical (64). The length of the insulating skirt channel is selected such that there is sufficient plasma in the channel to enable adequate current conduction between the rails (1a, 1b).

Hawke, R.S.; Susoeff, A.R.

1994-01-04T23:59:59.000Z

2

Skirted projectiles for railguns  

DOE Patents [OSTI]

A single skirt projectile (20) having an insulating skirt (22) at its rear, or a dual trailing skirt projectile (30, 40, 50, 60) having an insulating skirt (32, 42, 52, 62) succeeded by an arc extinguishing skirt (34, 44, 54, 64), is accelerated by a railgun accelerator 10 having a pair of parallel conducting rails (1a, 1b) which are separated by insulating wall spacers (11). The insulating skirt (22, 32, 42, 52, 62) includes a plasma channel (38). The arc extinguishing skirt (34, 44, 54, 64) interrupts the conduction that occurs in the insulating skirt channel (38) by blocking the plasma arc (3) from conducting current from rail to rail (1a, 1b) at the rear of the projectile (30, 40, 50, 60). The arc extinguishing skirt may be comprised of two plates (36a, 36b) which form a horseshoe wherein the plates are parallel to the rails (1a, b); a chisel-shape design; cross-shaped, or it may be a cylindrical (64). The length of the insulating skirt channel is selected such that there is sufficient plasma in the channel to enable adequate current conduction between the rails (1a, 1b).

Hawke, Ronald S. (Livermore, CA); Susoeff, Allan R. (Pleasanton, CA)

1994-01-01T23:59:59.000Z

3

The External Aerodynamics of Canine Olfaction Gary S. Settles*  

E-Print Network [OSTI]

The External Aerodynamics of Canine Olfaction Gary S. Settles* , Douglas A. Kester** , Lori J Literature on the External Aerodynamics of Olfaction B. Precedent Literature on Aerodynamic Sampling Technology III. Canine Olfaction Experiments IV. The Design of an Aerodynamic Sniffer A. Background B

Settles, Gary S.

4

AEROSPACE SCIENCES Applied aerodynamics  

E-Print Network [OSTI]

AEROSPACE SCIENCES Applied aerodynamics This year saw significant progress in industry, research labs, and academia in the development of flow-control concepts, novel configuration aerodynamic concepts, and aerodynamic im- provement technologies for enhancing the fuel efficiency and performance

Xu, Kun

5

Neo Aerodynamic | Open Energy Information  

Open Energy Info (EERE)

Neo Aerodynamic Jump to: navigation, search Name: Neo Aerodynamic Region: United States Sector: Marine and Hydrokinetic Website: http:www.neo-aerodynamic.com This company is...

6

Aerodynamics Antony Jameson  

E-Print Network [OSTI]

Chapter 11 Aerodynamics Antony Jameson Stanford University, Stanford, CA, USA 1 Focus Multidimensional Domains 359 6 Time-stepping Schemes 365 7 Aerodynamic Shape Optimization 379 8 Related Chapters 400 Acknowledgment 400 References 400 1 FOCUS AND HISTORICAL BACKGROUND 1.1 Classical aerodynamics

Jameson, Antony

7

Hypersonic Arbitrary-Body Aerodynamics (HABA) for conceptual design  

SciTech Connect (OSTI)

The Hypersonic Arbitrary-Body Aerodynamics (HABA) computer program predicts static and dynamic aerodynamic derivatives at hypersonic speeds for any vehicle geometry. It is intended to be used during conceptual design studies where fast computational speed is required. It uses the same geometry and hypersonic aerodynamic methods as the Mark IV Supersonic/Hypersonic Arbitrary-Body Program (SHABP) developed under sponsorship of the Air Force Flight Dynamics Laboratory; however, the input and output formats have been improved to make it easier to use. This program is available as part of the Department 9140 CAE software.

Salguero, D.E.

1990-03-15T23:59:59.000Z

8

The Aerodynamic Forces On Misaligned Platoons  

E-Print Network [OSTI]

M. , Tokumaru, P. , 1997, “Aerodynamic benefits from close-Mason, W.T. , (Ed. ): Aerodynamic Drag Mechanisms of BluffBrowand, F. , 1995, The aerodynamic performance of platoons;

Marcu, Bogdan; Browand, Fred

1998-01-01T23:59:59.000Z

9

AIAA 20033498 Viscous Aerodynamic Shape  

E-Print Network [OSTI]

AIAA 2003­3498 Viscous Aerodynamic Shape Optimization of Wings including Planform Variables Kasidit Aerodynamics Conference Orlando, Florida/June 23­26, 2003 For permission to copy or republish, contact­4344 #12;VISCOUS AERODYNAMIC SHAPE OPTIMIZATION OF WINGS INCLUDING PLANFORM VARIABLES Kasidit Leoviriyakit

Jameson, Antony

10

Tribological evaluation of piston skirt/cylinder liner contact interfaces under boundary lubrication conditions.  

SciTech Connect (OSTI)

The friction and wear between the piston and cylinder liner significantly affects the performance of internal combustion engines. In this paper, segments from a commercial piston/cylinder system were tribologically tested using reciprocating motion. The tribological contact consisted of aluminium alloy piston segments, either uncoated, coated with a graphite/resin coating, or an amorphous hydrogenated carbon (a-C : H) coating, in contact with gray cast iron liner segments. Tests were conducted in commercial synthetic motor oils and base stocks at temperatures up to 120 C with a 2 cm stroke length at reciprocating speeds up to 0.15 m s{sup -1}. The friction dependence of these piston skirt and cylinder liner materials was studied as a function of load, sliding speed and temperature. Specifically, an increase in the sliding speed led to a decrease in the friction coefficient below approximately 70 C, while above this temperature, an increase in sliding speed led to an increase in the friction coefficient. The presence of a coating played an important role. It was found that the graphite/resin coating wore quickly, preventing the formation of a beneficial tribochemical film, while the a-C : H coating exhibited a low friction coefficient and provided significant improvement over the uncoated samples. The effect of additives in the oils was also studied. The tribological behaviour of the interface was explained based on viscosity effects and subsequent changes in the lubrication regime, formation of chemical and tribochemical films.

Demas, N. G.; Erck, R. A.; Fenske, G. R.; Energy Systems

2010-03-01T23:59:59.000Z

11

Computer subroutine for estimating aerodynamic blade loads on Darrieus vertical axis wind turbines. [FORCE code  

SciTech Connect (OSTI)

An important aspect of structural design of the Darrieus rotor is the determination of aerodynamic blade loads. This report describes a load generator which has been used at Sandia for quasi-static and dynamic rotor analyses. The generator is based on the single streamtube aerodynamic flow model and is constructed as a FORTRAN IV subroutine to facilitate its use in finite element structural models. Input and output characteristics of the subroutine are described and a complete listing is attached as an appendix.

Sullivan, W. N.; Leonard, T. M.

1980-11-01T23:59:59.000Z

12

Aerodynamic Analysis of wind turbine.  

E-Print Network [OSTI]

??The thesis investigates the application of vortex theory for analyzing the aerodynamic loads on wind turbine blades. Based on this method, a graphical user friendly… (more)

Zarmehri, Ayyoob

2012-01-01T23:59:59.000Z

13

Low Speed Unsteady Aerodynamics Soumitra Banerjee*  

E-Print Network [OSTI]

Low Speed Unsteady Aerodynamics Soumitra Banerjee* Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061 Unsteady aerodynamics is the study of fluid flow, where the flow field changes with time. The unsteadiness is significant in many aerodynamic applications; few examples

Patil, Mayuresh

14

Computational Aerodynamics and Aeroacoustics for Wind Turbines  

E-Print Network [OSTI]

Computational Aerodynamics and Aeroacoustics for Wind Turbines #12;#12;Computational Aerodynamics and Aeroacoustics for Wind Turbines Wen Zhong Shen Fluid Mechanics Department of Mechanical Engineering TECHNICAL Shen, Wen Zhong Computational Aerodynamics and Aeroacoustics for Wind Turbines Doctor Thesis Technical

15

Integrated External Aerodynamic and Underhood Thermal Analysis...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

External Aerodynamic and Underhood Thermal Analysis for Heavy Vehicles Integrated External Aerodynamic and Underhood Thermal Analysis for Heavy Vehicles 2012 DOE Hydrogen and Fuel...

16

Modelling and Simulation in Aerodynamic Design  

E-Print Network [OSTI]

Modelling and Simulation in Aerodynamic Design In different kinds of aerodynamic design elements is too complex. Aerodynamic properties of different airfoils are found from either numerical turbine blade, two design features are important. The aerodynamic design attempts to optimize the blade

Mosegaard, Klaus

17

Aerodynamics at the Particle Level  

E-Print Network [OSTI]

This paper is intended to clarify some of the rather well-known aerodynamic phenomena. It is also intended to pique the interest of the layman as well as the professional. All aerodynamic forces on a surface are caused by collisions of fluid particles with the surface. While the standard approach to fluid dynamics, which is founded on the fluid approximation, is effective in providing a means of calculating various behavior and properties, it begs the question of causality. The determination of the causes of many of the most important aerodynamic effects requires a microscopic examination of the fluid and of the surface with which it interacts. The Kutta-Joukowski theorem is investigated from first physical principles. It is noted that the circulation does not arise as a physical phenomenon. Various aerodynamic devices are discussed, e.g. rocket engine exhaust diffuser and the perfume atomizer.

Charles A. Crummer

2012-09-23T23:59:59.000Z

18

UPWIND, Aerodynamics and aero-elasticity Rotor aerodynamics in atmospheric shear flow  

E-Print Network [OSTI]

UPWIND, Aerodynamics and aero-elasticity Rotor aerodynamics in atmospheric shear flow Niels N codes for wind turbines utilize aerodynamics based on BEM methods, see [1, 2]. For modern large scale

19

Explanation and discovery in aerodynamics  

E-Print Network [OSTI]

The purpose of this paper is to discuss and clarify the explanations commonly cited for the aerodynamic lift generated by a wing, and to then analyse, as a case study of engineering discovery, the aerodynamic revolutions which have taken place within Formula 1 in the past 40 years. The paper begins with an introduction that provides a succinct summary of the mathematics of fluid mechanics.

Gordon McCabe

2005-12-22T23:59:59.000Z

20

Transient Vehicle Aerodynamics In Four-car Platoons  

E-Print Network [OSTI]

7 Platoon Aerodynamics 7.1 Drag Coefficient . . . . . . . .0 . Savaa. Transient aerodynamics in vehicle interactions:implications in platoon aerodynamics. Master’s thesis,

Chen, A. L.; Savas, Omer; Hedrick, Karl

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

The Aerodynamic Performance Of Platoons: A Final Report  

E-Print Network [OSTI]

OF CALIFORNIA, BERKELEY The Aerodynamic Performance of1995 ISSN 1055-1425 The Aerodynamic Performance of Platoons10 October 1995 The Aerodynamic Performance of Platoons A

Zabat, Michael; Stabile, Nick; Farascaroli, Stefano; Browand, Frederick

1995-01-01T23:59:59.000Z

22

The Aerodynamics of Deforming Wings at Low Reynolds Number  

E-Print Network [OSTI]

and Karl G. Gotz. Unsteady aerodynamic performance of model26] G. Du and M. Sun. Aerodynamic effects of corrugation andof flexibility on the aerodynamic performance of a hovering

Medina, Albert

2013-01-01T23:59:59.000Z

23

Spring 2011 ME706 Acoustics and Aerodynamic Sound ME706 Acoustics and Aerodynamic Sound  

E-Print Network [OSTI]

Spring 2011 ME706 Acoustics and Aerodynamic Sound ME706 Acoustics and Aerodynamic Sound Instructor-surface interaction. Spring 2011 1 ME706 Acoustics and Aerodynamic Sound #12;Spring 2011 ME706 Acoustics and Aerodynamic Sound Students are expected to: · Exhibit a level of mathematical maturity roughly equivalent

24

ME421. Foundations of Aerodynamics. Victor Yakhot  

E-Print Network [OSTI]

ME421. Foundations of Aerodynamics. Victor Yakhot Syllabus. Spring 2014 . 1/16, 21. Fluids;Books. 1. D. Wilcox, "Basic Fluid Mechanics". 2. J. Anderson, Fundamentals of aerodynamics. 3. V.Yakhot,, ME421. Fluid Mechanics and aerodynamics. My lecture notes. 4. I. Abbott and A. Doenhoff, Theory

Lin, Xi

25

ME421. Foundations of Aerodynamics. Victor Yakhot  

E-Print Network [OSTI]

ME421. Foundations of Aerodynamics. Victor Yakhot Syllabus. Spring 2013 . 1/17, 22. Fluids Mechanics". 2. J. Anderson, Fundamentals of aerodynamics. 3. V.Yakhot,, ME421. Fluid Mechanics and aerodynamics. My lecture notes. 4. I. Abbott and A. Doenhoff, Theory of wing sections, Dover Publications, NY

26

Conformal Mapping in Wing Aerodynamics Thomas Johnson  

E-Print Network [OSTI]

Conformal Mapping in Wing Aerodynamics Thomas Johnson June 4, 2013 Contents 1 Introduction 1 2 the first complete treatment of conformal mapping in aerodynamics. Near the beginning of the twentieth and aerodynamics. The purpose of this exposition is to give the reader an elementary intro- duction to the use

Morrow, James A.

27

Challenges and Complexity of Aerodynamic Wing  

E-Print Network [OSTI]

Chapter 1 Challenges and Complexity of Aerodynamic Wing Design Kasidit Leoviriyakit and Antony@stanford.edu and jameson@baboon.stanford.edu This paper focuses on aerodynamic design methodology. It discusses challenges and complexity of aerodynamic wing design for a transonic aircraft, which arise from the complex nature of flow

Jameson, Antony

28

Airfoil Optimization Using Practical Aerodynamic Design Requirements  

E-Print Network [OSTI]

Airfoil Optimization Using Practical Aerodynamic Design Requirements Howard P. Buckley, Beckett Y., Toronto, Ontario, M3H 5T6, Canada Practical aerodynamic design problems must balance the goal the aerodynamic constraints imposed at the off-design operating conditions to be treated explicitly. Both methods

Zingg, David W.

29

Aerodynamics and Aeroelastics, WP 2 Flemming Rasmussen  

E-Print Network [OSTI]

Aerodynamics and Aeroelastics, WP 2 Flemming Rasmussen Aeroelastic Design Wind Energy Department Risø DTU #12;WP2 Aero-dynamics and Aero-elastics OBJECTIVES 1. Development of nonlinear structural dynamic models (modeling on the micromechanical scale is input from WP3). 2. Advanced aerodynamic models

30

On Aerodynamic Design Through Multipoint Numerical Optimization  

E-Print Network [OSTI]

On Aerodynamic Design Through Multipoint Numerical Optimization Howard P. Buckley, and David WT6, Canada A multipoint optimization approach is used to solve aerodynamic design problems en integral as an objective function is demonstrated to improve aerodynamic performance over a range of on

Zingg, David W.

31

CFD-based Optimization for Automotive Aerodynamics  

E-Print Network [OSTI]

Chapter 1 CFD-based Optimization for Automotive Aerodynamics Laurent Dumas Abstract The car drag- ments. An overview of the main characteristics of automotive aerodynamics and a detailed presentation.dumas@upmc.fr) 1 #12;2 Laurent Dumas 1.1 Introducing Automotive Aerodynamics 1.1.1 A Major Concern for Car

Dumas, Laurent

32

Comparing Aerodynamic Models for Numerical Simulation of  

E-Print Network [OSTI]

Comparing Aerodynamic Models for Numerical Simulation of Dynamics and Control of Aircraft and simulation of aircraft, yet other aerodynamics models exist that can provide more accurate results for certain simulations without a large increase in computational time. In this paper, sev- eral aerodynamics

Peraire, Jaime

33

AIAA 99--1467 LOW ORDER AERODYNAMIC  

E-Print Network [OSTI]

AIAA 99--1467 LOW ORDER AERODYNAMIC MODELS FOR AEROELASTIC CONTROL OF TURBOMACHINES K.E. Willcox, J of Aeronautics and Astronautics 1801 Alexander Bell Drive, Suite 500, Reston, VA 22091 #12; LOW ORDER AERODYNAMIC order aerodynamic model is developed for aeroelastic analysis of turbomachines. The proper or­ thogonal

Peraire, Jaime

34

Toward Practical Aerodynamic Design Through Numerical Optimization  

E-Print Network [OSTI]

Toward Practical Aerodynamic Design Through Numerical Optimization David W. Zingg, and Laura6, Canada A Newton-Krylov algorithm for aerodynamic optimization is applied to the multipoint design aerodynamic design. I. Introduction Beginning with the work of Hicks et al.1 and Hicks and Henne,2 numerical

Zingg, David W.

35

Aerodynamic Lightweight Cab Structure Components | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting lm060smith2012o.pdf More Documents & Publications Aerodynamic Lightweight Cab Structure...

36

Rarefaction Effects in Hypersonic Aerodynamics Vladimir V. Riabov  

E-Print Network [OSTI]

Rarefaction Effects in Hypersonic Aerodynamics Vladimir V. Riabov Department of Mathematics, and others) in aerodynamics of the probes is studied. Important kinetic effects that are specific. Keywords: DSMC method, aerodynamic coefficients, hypersonic flows, similarity parameters, torus, spinning

Riabov, Vladimir V.

37

The Aerodynamics of Deforming Wings at Low Reynolds Number  

E-Print Network [OSTI]

of advance ratio on the aerodynamics of revolving wings. J.and M. H. Dickinson. The aerodynamics of hovering flight inand Industrial Aerodynamics, 96:2093–2103, 2008. [56] D. Kim

Medina, Albert

2013-01-01T23:59:59.000Z

38

THE AERODYNAMICS OF THE BRITISH LATE TRIASSIC KUEHNEOSAURIDAE  

E-Print Network [OSTI]

THE AERODYNAMICS OF THE BRITISH LATE TRIASSIC KUEHNEOSAURIDAE by KOEN STEIN* , COLIN PALMER been limited. Here, we provide a thorough aerodynamic analysis of both genera of British kuehneosaur words: Kuehneosauridae, Diapsida, Late Triassic, glid- ing, aerodynamics. The Kuehneosauridae

Benton, Michael

39

Hybrid method for aerodynamic shape optimization in automotive industry  

E-Print Network [OSTI]

Hybrid method for aerodynamic shape optimization in automotive industry Freedeerique Muyl April 2003; accepted 4 June 2003 Abstract An aerodynamic shape optimization tool for complex industrial reasons, concerns car manufacturers. Consequently, the improvement of the aerodynamics of car shapes, more

Dumas, Laurent

40

Aerodynamic Forces on Truck Models, Including Two Trucks in Tandem  

E-Print Network [OSTI]

rear-edge shaping on the aerodynamic drag of bluff vehiclesOF CALIFORNIA, BERKELEY Aerodynamic Forces on Truck Models,TRANSIT AND HIGHWAYS Aerodynamic Forces on Truck Models,

Hammache, Mustapha; Michaelian, Mark; Browand, Fred

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Evaporation of Water from Particles in the Aerodynamic Lens Inlet...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Water from Particles in the Aerodynamic Lens Inlet: An Experimental Study. Evaporation of Water from Particles in the Aerodynamic Lens Inlet: An Experimental Study. Abstract:...

42

Aerodynamic Drag and Gyroscopic Stability  

E-Print Network [OSTI]

This paper describes the effects on aerodynamic drag of rifle bullets as the gyroscopic stability is lowered from 1.3 to 1.0. It is well known that a bullet can tumble for stability less than 1.0. The Sierra Loading Manuals (4th and 5th Editions) have previously reported that ballistic coefficient decreases significantly as gyroscopic stability, Sg, is lowered below 1.3. These observations are further confirmed by the experiments reported here. Measured ballistic coefficients were compared with gyroscopic stabilities computed using the Miller Twist Rule for nearly solid metal bullets with uniform density and computed using the Courtney-Miller formula for plastic-tipped bullets. The experiments reported here also demonstrate a decrease in aerodynamic drag near Sg = 1.23 +/- 0.02. It is hypothesized that this decrease in drag over a narrow band of Sg values is due to a rapid damping of coning motions (precession and nutation). Observation of this drag decrease at a consistent value of Sg demonstrates the relati...

Courtney, Elya R

2013-01-01T23:59:59.000Z

43

Aeroelastic Analysis of Bridges: Effects of Turbulence and Aerodynamic Nonlinearities  

E-Print Network [OSTI]

Aeroelastic Analysis of Bridges: Effects of Turbulence and Aerodynamic Nonlinearities Xinzhong Chen for capturing the emerging concerns in bridge aerodynamics introduced by aerodynamic nonlinearities/or with aerodynamic characteristics sensitive to the effective angle of incidence. This paper presents a nonlinear

Kareem, Ahsan

44

MULTITARGET ERROR ESTIMATION AND ADAPTIVITY IN AERODYNAMIC FLOW SIMULATIONS  

E-Print Network [OSTI]

MULTI­TARGET ERROR ESTIMATION AND ADAPTIVITY IN AERODYNAMIC FLOW SIMULATIONS RALF HARTMANN # Abstract. Important quantities in aerodynamic flow simulations are the aerodynamic force coe subject classifications. 65N12,65N15,65N30 1. Introduction. In aerodynamic computations like compressible

Hartmann, Ralf

45

MULTITARGET ERROR ESTIMATION AND ADAPTIVITY IN AERODYNAMIC FLOW SIMULATIONS  

E-Print Network [OSTI]

MULTITARGET ERROR ESTIMATION AND ADAPTIVITY IN AERODYNAMIC FLOW SIMULATIONS RALF HARTMANN Abstract. Important quantities in aerodynamic flow simulations are the aerodynamic force coefficients including Navier-Stokes equations AMS subject classifications. 65N12,65N15,65N30 1. Introduction. In aerodynamic

Hartmann, Ralf

46

The aerodynamics of the beautiful game  

E-Print Network [OSTI]

We consider the aerodynamics of football, specifically, the interaction between a ball in flight and the ambient air. Doing so allows one to account for the characteristic range and trajectories of balls in flight, as well ...

Bush, John W. M.

2013-01-01T23:59:59.000Z

47

Anisotropic Grid Adaptation for Multiple Aerodynamic Outputs  

E-Print Network [OSTI]

Anisotropic grid–adaptive strategies are presented for viscous flow simulations in which the accurate prediction of multiple aerodynamic outputs (such as the lift, drag, and moment coefficients) is required from a single ...

Venditti, David A.

48

Transient Platoon Aerodynamics During Passing Maneuvers and In-line Oscillations  

E-Print Network [OSTI]

p CHAPTER TRANSIENT AERODYNAMICS DURING IN-LINE OSCILLATIONSA. J. , Road Vehicle Aerodynamics, Pentech Press, London,6] Hucho, W. - H . (ed. ), Aerodynamics of Road Vehicles,

Tsuei, J. L.; Savas, O.; Hedrick, J. K.

2000-01-01T23:59:59.000Z

49

Aerodynamic Drag and Gyroscopic Stability  

E-Print Network [OSTI]

This paper describes the effects on aerodynamic drag of rifle bullets as the gyroscopic stability is lowered from 1.3 to 1.0. It is well known that a bullet can tumble for stability less than 1.0. The Sierra Loading Manuals (4th and 5th Editions) have previously reported that ballistic coefficient decreases significantly as gyroscopic stability, Sg, is lowered below 1.3. These observations are further confirmed by experiments reported here. Measured ballistic coefficients were compared with gyroscopic stabilities computed using the Miller Twist Rule for nearly solid metal bullets with uniform density and computed using the Courtney-Miller formula for plastic-tipped bullets. The relationship between Sg and drag may be used to test the applicability of existing gyroscopic stability formulas for given bullet designs and to evaluate the accuracy of alternate formulas in cases where the existing stability formulas are not as accurate. The most definitive test of formulas predicting stability will always be observation of whether bullets tumble under given conditions. However, observations of drag changes provide valuable supplemental information because they suggest changes in stability as conditions change. Use of a continuous variable (drag) rather than a binary variable (tumbling) allows insight into stability over a range of conditions where the binary variable does not change.

Elya R. Courtney; Michael W. Courtney

2014-10-16T23:59:59.000Z

50

In vivo recording of aerodynamic force with an aerodynamic force platform  

E-Print Network [OSTI]

Flapping wings enable flying animals and biomimetic robots to generate elevated aerodynamic forces. Measurements that demonstrate this capability are based on tethered experiments with robots and animals, and indirect force calculations based on measured kinematics or airflow during free flight. Remarkably, there exists no method to measure these forces directly during free flight. Such in vivo recordings in freely behaving animals are essential to better understand the precise aerodynamic function of their flapping wings, in particular during the downstroke versus upstroke. Here we demonstrate a new aerodynamic force platform (AFP) for nonintrusive aerodynamic force measurement in freely flying animals and robots. The platform encloses the animal or object that generates fluid force with a physical control surface, which mechanically integrates the net aerodynamic force that is transferred to the earth. Using a straightforward analytical solution of the Navier-Stokes equation, we verified that the method is ...

Lentink, David; Ingersoll, Rivers

2014-01-01T23:59:59.000Z

51

Error estimation and adaptive mesh refinement for aerodynamic flows  

E-Print Network [OSTI]

Error estimation and adaptive mesh refinement for aerodynamic flows Ralf Hartmann1 and Paul Houston2 1 Institute of Aerodynamics and Flow Technology DLR (German Aerospace Center) Lilienthalplatz 7

Hartmann, Ralf

52

AE 400-level (choose 2): AE 410 Computational Aerodynamics  

E-Print Network [OSTI]

AE 400-level (choose 2): AE 410 Computational Aerodynamics AE 412 Viscous flow & Heat Transfer AE 416 Applied Aerodynamics AE 419 Aircraft Flight Mechanics AE 433 Aerospace Propulsion AE 434 Rocket

Gilbert, Matthew

53

Five Year Plan Update Leishman 631 Helicopter Aerodynamics I X X X X  

E-Print Network [OSTI]

2017 Rotorcraft Leishman 631 Helicopter Aerodynamics I X X X X Leishman 632 Helicopter Aerodynamics II X Aerodynamics & Propulsion Sedwick 663 Intro to Plasmas for Space Prop/Powr X X Yu 665 Advanced of Aerodynamics Jones 672 Low Reynods Number Aerodynamics X X X X Cadou 674 Aerodynamics of Comp. Fluids X X

Shapiro, Benjamin

54

COPYRIGHT 2003 by ASME AERODYNAMICS OF TIP LEAKAGE FLOWS  

E-Print Network [OSTI]

COPYRIGHT 2003 by ASME 1 AERODYNAMICS OF TIP LEAKAGE FLOWS NEAR PARTIAL SQUEALER RIMS IN AN AXIAL of aerodynamic characteristics of full and partial-length squealer rims in a turbine stage. Full and partial of these "partial squealer tips" and their chordwise position are varied to find an optimal aerodynamic tip

Camci, Cengiz

55

INTRODUCTION 1.1 Aerodynamics of Rotors in Forward Flight  

E-Print Network [OSTI]

1 CHAPTER I INTRODUCTION 1.1 Aerodynamics of Rotors in Forward Flight The prediction of rotor blade aerodynamic loads, especially in forward flight, requires accurate and efficient modeling of several distinct to the nonlinear interaction between the rotor aerodynamics, trim, aeroelasticity and blade dynamics. As stated

56

Journal of Wind Engineering and Industrial Aerodynamics 91 (2003) 15111528  

E-Print Network [OSTI]

Journal of Wind Engineering and Industrial Aerodynamics 91 (2003) 1511­1528 New frontiers in aerodynamic tailoring of long span bridges: an advanced analysis framework Xinzhong Chen*, Ahsan Kareem Nat analysis have been made utilizing realistic aerodynamic force modeling for bridges with bluff sections

Chen, Xinzhong

57

Ris-PhD-Report Wind Turbines: Unsteady Aerodynamics and  

E-Print Network [OSTI]

Risø-PhD-Report Wind Turbines: Unsteady Aerodynamics and Inflow Noise Brian Riget Broe Risø-PhD-47 Title: Wind Turbines: Unsteady Aerodynamics and Inflow Noise Division: Wind Energy Division Risø-PhD-47(EN) December 2009 Abstract (max. 2000 char.): Aerodynamical noise from wind turbines due

58

Robust Multi-Objective Optimization in Aerodynamics using MGDA  

E-Print Network [OSTI]

Robust Multi-Objective Optimization in Aerodynamics using MGDA Daigo Maruyama N° 8428-00919215,version1-16Dec2013 #12;Robust Multi-Objective Optimization in Aerodynamics using MGDA Daigo: This study deals with robust design optimization strategies in aerodynamics

Boyer, Edmond

59

AIAA Paper 2001-0870 Re-engineering Aerodynamics Education  

E-Print Network [OSTI]

AIAA Paper 2001-0870 Re-engineering Aerodynamics Education David Darmofal, Earll Murman Aeronautics Paper 2001-0870 Re-engineering Aerodynamics Education David Darmofal* , Earll Murman Massachusetts Institute of Technology Michael Love Lockheed Martin Aeronautics Company Abstract Aerodynamics curriculum

Peraire, Jaime

60

A Genetic Algorithm for Multiobjective Design Optimization in Aerodynamics and  

E-Print Network [OSTI]

A Genetic Algorithm for Multiobjective Design Optimization in Aerodynamics and Electromagnetics R. The objective functions in the optimization problem measure the aerodynamic feasibil­ ity based on the drag been optimized with respect to only one discipline such as aerodynamics or electromagnetics. Although

Coello, Carlos A. Coello

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Fifty Years of Aerodynamics: Successes, Challenges, and Opportunities  

E-Print Network [OSTI]

Fifty Years of Aerodynamics: Successes, Challenges, and Opportunities T.E. Nelson * D.W. Zingg, Canada. E-mail: tnelson@dehavilland.ca ** Senior Canada Research Chair in Computational Aerodynamics-mail: dwz@oddjob.utias.utoronto.ca Received 22 January 2004. PART I: AIRCRAFT DEVELOPMENT, AERODYNAMIC

Zingg, David W.

62

Single-and Multi-Point Aerodynamic Shape Optimization  

E-Print Network [OSTI]

Single- and Multi-Point Aerodynamic Shape Optimization Using A Parallel Newton-Krylov Approach, Ontario, M3H 5T6, Canada A Newton-Krylov algorithm for aerodynamic shape optimization in three dimensions the capabilities and efficiency of the approach. I. Introduction In the aerodynamic design of aircraft, there have

Zingg, David W.

63

Strategies for Solving High-Fidelity Aerodynamic Shape Optimization Problems  

E-Print Network [OSTI]

Strategies for Solving High-Fidelity Aerodynamic Shape Optimization Problems Zhoujie Lyu Aerodynamic shape optimization based on high-fidelity models is a computational intensive endeavor. The techniques are tested using the Common Research Model wing benchmark defined by the Aerodynamic Design

Papalambros, Panos

64

Aerodynamic Shape Optimization for Aircraft Design Antony Jameson  

E-Print Network [OSTI]

Aerodynamic Shape Optimization for Aircraft Design Antony Jameson Department of Aeronautics September 6-10, 2004 c A. Jameson 2004 Stanford University, Stanford, CA 1/55 Aerodynamic Shape Optimization for Aircraft Design #12;#12; Aerodynamic Design Tradeoffs A good first estimate of performance is provided

Stanford University

65

POLE ASSIGNMENT FOR A VIBRATING SYSTEM WITH AERODYNAMIC EFFECT #  

E-Print Network [OSTI]

POLE ASSIGNMENT FOR A VIBRATING SYSTEM WITH AERODYNAMIC EFFECT # J. N. WANG + , S. H. CHOU # , Y. C­input state feedback control arising from a one­dimensional vibrating system with aerodynamic e real axis. Key words. vibrating system, aerodynamic e#ect, state feedback control, pole assignment AMS

Chou, So-Hsiang

66

Advances in Aerodynamic Shape Optimization Antony Jameson1  

E-Print Network [OSTI]

1 Advances in Aerodynamic Shape Optimization Antony Jameson1 Stanford University, Stanford, CA to aerodynamic design. This shift has been mainly motivated by the availability of high performance comput- ing by J.L. Lions [1]. The method was first used for aerodynamic design by Jameson in 1988 [2, 3]. Since

Jameson, Antony

67

Aerodynamics simulation of operating rooms N. El Gharbi*  

E-Print Network [OSTI]

Aerodynamics simulation of operating rooms N. El Gharbi* A. Benzaoui*R. Bennacer** * Faculty. Keywords: Operating room, aerodynamics simulation, turbulent model, comfort, Airflow, Indoor air quality distribution scheme. To ensure these optimal conditions, a study of the aerodynamics flow in a conditioned

Paris-Sud XI, Université de

68

Optimum Aerodynamic Design using the Navier--Stokes Equations  

E-Print Network [OSTI]

Optimum Aerodynamic Design using the Navier--Stokes Equations A. JAMESON \\Lambda ; N.A. PIERCE y factors such as aerodynamic effi­ ciency, structural weight, stability and control, and the volume the disciplines. The development of accurate and efficient methods for aerodynamic shape optimization represents

Pierce, Niles A.

69

POLE ASSIGNMENT FOR A VIBRATING SYSTEM WITH AERODYNAMIC EFFECT  

E-Print Network [OSTI]

POLE ASSIGNMENT FOR A VIBRATING SYSTEM WITH AERODYNAMIC EFFECT J. N. WANG, S. H. CHOU, Y. C. CHEN feedback control arising from a one-dimensional vibrating system with aerodynamic effect. On the practical real axis. Key words. vibrating system, aerodynamic effect, state feedback control, pole assignment AMS

Lin, Wen-Wei

70

On Aerodynamic Optimization Under a Range of Operating Conditions  

E-Print Network [OSTI]

On Aerodynamic Optimization Under a Range of Operating Conditions David W. Zingg, and Samy Elias In aerodynamic design, good performance is generally required under a range of oper- ating conditions, including aerodynamic shape optimization.1­6 The designer specifies an objective, operating conditions, constraints

Zingg, David W.

71

Unsteady aerodynamic models for agile flight at low Reynolds numbers  

E-Print Network [OSTI]

Unsteady aerodynamic models for agile flight at low Reynolds numbers Steven L. Brunton , Clarence W for the unsteady aerodynamic forces on a small wing in response to agile maneuvers and gusts. In a previous study, it was shown that Theodorsen's and Wagner's unsteady aerodynamic models agree with force data from DNS

Rowley, Clarence W.

72

An Evolutionary Geometry Parametrization for Aerodynamic Shape Optimization  

E-Print Network [OSTI]

An Evolutionary Geometry Parametrization for Aerodynamic Shape Optimization Xiaocong Han and David, M3H 5T6, Canada An evolutionary geometry parametrization is presented for aerodynamic shape optimiza, unconventional aerodynamic configurations. Based on improvements in computational fluid dynamics (CFD) and high

Zingg, David W.

73

A Pilot Project in Preparation of an Aerodynamic Optimization Workshop  

E-Print Network [OSTI]

A Pilot Project in Preparation of an Aerodynamic Optimization Workshop with Lessons Learned John C-scale Aerodynamic Optimization Workshop. Three independent optimization efforts were conducted concurrently, each in the preparation of a possible future workshop on aerodynamic shape optimization. 1.0 Introduction During AIAA

Jameson, Antony

74

Aerodynamic Force Modeling for Unsteady Wing Ryan Jantzen  

E-Print Network [OSTI]

Aerodynamic Force Modeling for Unsteady Wing Maneuvers Ryan Jantzen and Kunihiko Taira Florida, Wright-Patterson Air Force Base, OH We report on the development of an aerodynamic force model for a flat focus is placed on examining the influence of large-amplitude wing motion on the unsteady aerodynamics

75

Ris-R-1543(EN) Aerodynamic investigation of Winglets on  

E-Print Network [OSTI]

Risø-R-1543(EN) Aerodynamic investigation of Winglets on Wind Turbine Blades using CFD Jeppe Johansen and Niels N. Sørensen Title: Aerodynamic investigation of Winglets on Wind Turbine Blades using of the aerodynamics around a wind turbine blade with a winglet using Computational Fluid Dynamics, CFD. Five winglets

76

Error estimation and adaptive mesh refinement for aerodynamic flows  

E-Print Network [OSTI]

Error estimation and adaptive mesh refinement for aerodynamic flows Ralf Hartmann, Joachim Held-oriented mesh refinement for single and multiple aerodynamic force coefficients as well as residual-based mesh refinement applied to various three-dimensional lam- inar and turbulent aerodynamic test cases defined

Hartmann, Ralf

77

Managing Approximate Models in Evolutionary Aerodynamic Design Optimization  

E-Print Network [OSTI]

Managing Approximate Models in Evolutionary Aerodynamic Design Optimization Yaochu Jin yaochu jin­ mization problems that are discontinuous, multi­modal and multi­objective [1, 2]. Aerodynamic structural to high complexity of the aerodynamic analysis and large number of evaluations needed in the evolutionary

Coello, Carlos A. Coello

78

Optimizing the Aerodynamic Efficiency of IM Freight Trains  

E-Print Network [OSTI]

Optimizing the Aerodynamic Efficiency of IM Freight Trains Yung-Cheng Lai University of Illinois aerodynamic penalties and fuel consumption than general trains IM trains suffer from their equipment design and loading pattern These large gaps directly affect the aerodynamic drag of the train. This effect is greater

Barkan, Christopher P.L.

79

THE VELOCITY DEPENDENCE OF AERODYNAMIC DRAG: A PRIMER FOR MATHEMATICIANS  

E-Print Network [OSTI]

THE VELOCITY DEPENDENCE OF AERODYNAMIC DRAG: A PRIMER FOR MATHEMATICIANS LYLE N. LONG and HOWARD­entry of the space shuttle into the earth's atmosphere. Dimensional analysis is an important tool in aerodynamics­T E X 1 #12; For detailed information on the aerodynamics and fluid mechanics pertinent to this paper

80

RESEARCH ARTICLE Aerodynamic and functional consequences of wing compliance  

E-Print Network [OSTI]

RESEARCH ARTICLE Aerodynamic and functional consequences of wing compliance Andrew M. Mountcastle Ã?, the instantaneous shape of an insect wing is dictated by the interaction of aerodynamic forces with the inertial rever- sals--loads that well exceed the mean aerodynamic force. Although wing compliance has been

Daniel, Tom

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Numerical Aerodynamic Optimization Incorporating Laminar-Turbulent Transition Prediction  

E-Print Network [OSTI]

Numerical Aerodynamic Optimization Incorporating Laminar-Turbulent Transition Prediction J. Driver-dimensional Newton­Krylov aerodynamic shape optimization algorithm is applied to several optimization problems a striking demonstration of the capability of the Newton­ Krylov aerodynamic optimization algorithm to design

Zingg, David W.

82

Optimizing the aerodynamic efficiency of intermodal freight trains  

E-Print Network [OSTI]

Optimizing the aerodynamic efficiency of intermodal freight trains Yung-Cheng Lai a,*, Christopher form 24 April 2007; accepted 17 May 2007 Abstract We develop an aerodynamic loading assignment model fuel-efficient trains. This is the first use of optimization modeling to address the aerodynamics

Barkan, Christopher P.L.

83

Aerodynamic beam generator for large particles  

DOE Patents [OSTI]

A new type of aerodynamic particle beam generator is disclosed. This generator produces a tightly focused beam of large material particles at velocities ranging from a few feet per second to supersonic speeds, depending on the exact configuration and operating conditions. Such generators are of particular interest for use in additive fabrication techniques.

Brockmann, John E. (Albuquerque, NM); Torczynski, John R. (Albuquerque, NM); Dykhuizen, Ronald C. (Albuquerque, NM); Neiser, Richard A. (Albuquerque, NM); Smith, Mark F. (Albuquerque, NM)

2002-01-01T23:59:59.000Z

84

GEN-IV Reactors  

Science Journals Connector (OSTI)

Generation-IV reactors are a set of nuclear reactors currently being developed under international collaborations targeting ... economics, proliferation resistance, and physical protection of nuclear energy. Nuclear

Taek K. Kim

2013-01-01T23:59:59.000Z

85

Aerodynamic characteristics of a feathered dinosaur measured using physical models. Effects of form on static stability and control effectiveness  

E-Print Network [OSTI]

McCay MG (2001) Aerodynamic stability and maneuverability ofrain forest canopy: the aerodynamic environment of gliding2011) Measurement of the aerodynamic stability and control

Evangelista, Dennis

2013-01-01T23:59:59.000Z

86

Aerodynamic interference between two Darrieus wind turbines  

SciTech Connect (OSTI)

The effect of aerodynamic interference on the performance of two curved bladed Darrieus-type vertical axis wind turbines has been calculated using a vortex/lifting line aerodynamic model. The turbines have a tower-to-tower separation distance of 1.5 turbine diameters, with the line of turbine centers varying with respect to the ambient wind direction. The effects of freestream turbulence were neglected. For the cases examined, the calculations showed that the downwind turbine power decrement (1) was significant only when the line of turbine centers was coincident with the ambient wind direction, (2) increased with increasing tipspeed ratio, and (3) is due more to induced flow angularities downstream than to speed deficits near the downstream turbine.

Schatzle, P.R.; Klimas, P.C.; Spahr, H.R.

1981-04-01T23:59:59.000Z

87

Aerodynamics of a rigid curved kite wing  

E-Print Network [OSTI]

A preliminary numerical study on the aerodynamics of a kite wing for high altitude wind power generators is proposed. Tethered kites are a key element of an innovative wind energy technology, which aims to capture energy from the wind at higher altitudes than conventional wind towers. We present the results obtained from three-dimensional finite volume numerical simulations of the steady air flow past a three-dimensional curved rectangular kite wing (aspect ratio equal to 3.2, Reynolds number equal to 3x10^6). Two angles of incidence -- a standard incidence for the flight of a tethered airfoil (6{\\deg}) and an incidence close to the stall (18{\\deg}) -- were considered. The simulations were performed by solving the Reynolds Averaged Navier-Stokes flow model using the industrial STAR-CCM+ code. The overall aerodynamic characteristics of the kite wing were determined and compared to the aerodynamic characteristics of the flat rectangular non twisted wing with an identical aspect ratio and section (Clark Y profil...

Maneia, Gianmauro; Tordella, Daniela; Iovieno, Michele

2013-01-01T23:59:59.000Z

88

Inertial and Aerodynamic Tail Steering of a Meso-scale Legged Robot  

E-Print Network [OSTI]

Legged Robots Use of Aerodynamics 2.5 Overview of previousare the use of passive aerodynamics in running robots. Fi-the first use of passive aerodynamics to induce a turn in a

Kohut, Nicholas Jospeh

2013-01-01T23:59:59.000Z

89

Transient Aerodynamic Effects on a Four-Car Platoon During Passing Maneuvers: Data Summary  

E-Print Network [OSTI]

B. Marcu, F. Browand, ”The Aerodynamic Forces on Misalignedof the Transient Aerodynamic Effects on a Four-Car PlatoonBERKELEY Transient Aerodynamic Effects on a Four-Car Platoon

Tsuei, L.; Hedrick, J. K.; Savas, O.

1999-01-01T23:59:59.000Z

90

E-Print Network 3.0 - aerodynamic shape optimization Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic shape optimization Page: << < 1 2 3 4 5 > >> 1 Aerodynamic shape and planform...

91

E-Print Network 3.0 - aerodynamic particle sizer Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic particle sizer Page: << < 1 2 3 4 5 > >> 1 Aerodynamic Particle Sizer Spectrometer...

92

E-Print Network 3.0 - aerodynamics Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Airfoil Summary: Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... engineer to aerodynamic designer to lead aerodynamicist...

93

E-Print Network 3.0 - aerodynamic design features Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Airfoil Summary: Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... engineer to aerodynamic designer to lead aerodynamicist...

94

E-Print Network 3.0 - aerodynamic stability Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of the aerodynamic resistance S. Liu, D. Mao, and L. Lu State key Laboratory of Remote Sensing Science, School... -705, 2006 Measurement and estimation of the aerodynamic...

95

E-Print Network 3.0 - aiaa aerodynamic measurement Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Aerospace and Ocean Engineering, Virginia Tech Collection: Engineering 24 Airfoil Ice-Accretion Aerodynamics Simulation and A. Broeren Summary: is required for aerodynamic...

96

Wind Turbine Blade Flow Fields and Prospects for Active Aerodynamic Control: Preprint  

SciTech Connect (OSTI)

This paper describes wind turbine flow fields that can cause adverse aerodynamic loading and can impact active aerodynamic control methodologies currently contemplated for wind turbine applications.

Schreck, S.; Robinson, M.

2007-08-01T23:59:59.000Z

97

Aerodynamic Focusing Of High-Density Aerosols  

SciTech Connect (OSTI)

High-density micron-sized particle aerosols might form the basis for a number of applications in which a material target with a particular shape might be quickly ionized to form a cylindrical or sheet shaped plasma. A simple experimental device was built in order to study the properties of high-density aerosol focusing for 1#22; m silica spheres. Preliminary results recover previous findings on aerodynamic focusing at low densities. At higher densities, it is demonstrated that the focusing properties change in a way which is consistent with a density dependent Stokes number.

Ruiz, D. E.; Fisch, Nathaniel

2014-02-24T23:59:59.000Z

98

Experimental aerodynamics research on a hypersonic vehicle  

SciTech Connect (OSTI)

Aerodynamic force and moment measurements and flow visualization results are presented for a hypersonic vehicle configuration at Mach 8. The basic vehicle configuration is a spherically blunted 10[degree] half-angle cone with a slice parallel with the axis of the vehicle. On the slice portion of the vehicle, a flap could be attached so that deflection angles of 10[degree], 20[degree] and 30[degree] could be obtained. All of the experimental results were obtained in the Sandia Mach 8 hypersonic wind tunnel for laminar boundary layer conditions. Flow visualization results include shear stress sensitive liquid crystal photographs, surface streak flow photographs (using liquid crystals), and spark schlieren photographs and video. The liquid crystals were used as an aid in verifying that a laminar boundary layer existed over the entire body. The surface flow photo-graphs show attached and separated flow on both the leeside of the vehicle and near the flap. A detailed uncertainty analysis was conducted to estimate the contributors to body force and moment measurement uncertainty. Comparisons are made with computational results to evaluate both the experimental and numerical results. This extensive set of high-quality experimental force and moment measurements is recommended for use in the calibration and validation of relevant computational aerodynamics codes.

Oberkampf, W.L.; Aeschliman, D.P.; Tate, R.E.; Henfling, J.F.

1993-04-01T23:59:59.000Z

99

Experimental aerodynamics research on a hypersonic vehicle  

SciTech Connect (OSTI)

Aerodynamic force and moment measurements and flow visualization results are presented for a hypersonic vehicle configuration at Mach 8. The basic vehicle configuration is a spherically blunted 10{degree} half-angle cone with a slice parallel with the axis of the vehicle. On the slice portion of the vehicle, a flap could be attached so that deflection angles of 10{degree}, 20{degree} and 30{degree} could be obtained. All of the experimental results were obtained in the Sandia Mach 8 hypersonic wind tunnel for laminar boundary layer conditions. Flow visualization results include shear stress sensitive liquid crystal photographs, surface streak flow photographs (using liquid crystals), and spark schlieren photographs and video. The liquid crystals were used as an aid in verifying that a laminar boundary layer existed over the entire body. The surface flow photo-graphs show attached and separated flow on both the leeside of the vehicle and near the flap. A detailed uncertainty analysis was conducted to estimate the contributors to body force and moment measurement uncertainty. Comparisons are made with computational results to evaluate both the experimental and numerical results. This extensive set of high-quality experimental force and moment measurements is recommended for use in the calibration and validation of relevant computational aerodynamics codes.

Oberkampf, W.L.; Aeschliman, D.P.; Tate, R.E.; Henfling, J.F.

1993-04-01T23:59:59.000Z

100

Generation IV (Gen IV) - Nuclear Engineering Division (Argonne)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Generation IV (Gen Generation IV (Gen IV) Generation IV Overview Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Major Programs Generation IV (Gen IV) Development of next generation nuclear systems featuring significant advances in sustainability, economics, safety, reliability, proliferation resistance and physical protection. Bookmark and Share Generation IV Fact Sheet (73 KB) Overview Generation IV nuclear energy systems target significant advances over current-generation and evolutionary systems in the areas of sustainability, safety and reliability, and economics. These systems are to be deployable by 2030 in both industrialized and developing countries. Development of Generation IV systems is an international initiative. A

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Generation -IV Reactor Concepts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Generation-IV Reactor Concepts Generation-IV Reactor Concepts Thomas H. Fanning Argonne National Laboratory 9700 South Cass Avenue Argonne, Illinois 60439, USA The Generation-IV International Forum (GIF) is a multi-national research and development (R&D) collaboration. The GIF pursues the development of advanced, next generation reactor technology with goals to improve: a) sustainability (effective fuel utilization and minimization of waste) b) economics (competitiveness with respect to other energy sources) c) safety and reliability (e.g., no need for offsite emergency response), and d) proliferation resistance and physical protection The GIF Technology Roadmap exercise selected six generic systems for further study: the Gas- cooled Fast Reactor (GFR), the Lead-cooled Fast Reactor (LFR), the Molten Salt Reactor (MSR),

102

Modeling FullEnvelope Aerodynamics of Small UAVs in RealTime Prof. Michael Selig  

E-Print Network [OSTI]

D M E S S Modeling FullEnvelope Aerodynamics of Small UAVs in RealTime Prof. Michael Selig Applied Aerodynamics Group and Subsonic Aerodynamics Research Lab Department of Aerospace Engineering will focus on the development of a full six degreeoffreedom aerodynamics modeling environment for small UAVs

Barthelat, Francois

103

E-Print Network 3.0 - aerodynamic drag presentation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

presentation Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic drag presentation...

104

Aerodynamic-Structural Design Studies of Low-Sweep Transonic Wings  

E-Print Network [OSTI]

Aerodynamic-Structural Design Studies of Low-Sweep Transonic Wings Antony Jameson Department level. High-fidelity aerodynamic and aerodynamic-structural optimizations are performed on a set to significantly reduce wing sweep without incurring either aerodynamic or structural penalties, especially for M

Jameson, Antony

105

E-Print Network 3.0 - aerodynamic drag presentations Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

presentations Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic drag presentations...

106

Unsteady aerodynamic analysis of subsonic oscillating cascade  

SciTech Connect (OSTI)

This paper describes the development of the source-doublet-based potential paneling method for oscillating cascade unsteady aerodynamic load predictions. By using the integral influence coefficient method and by using the interblade phase angles, the unsteady loads on an oscillating cascade can be accurately predicted at a minimum cost. As the grids are placed only on the blade surfaces, the blades are allowed to vibrate without grid deformation problems. Four notable subsonic oscillating cascade test cases that cover most important parameters, e.g., blade geometry, interblade phase angle, flow coefficient, flow speed, frequency, etc., are studied in this paper. The agreement between the present solutions and other numerical/experimental results demonstrates the robustness of the present model. Applicability of the method for realistic compressible flow cascades is also discussed.

Chen, S.H.; Eastland, A.H.; Jackson, E.D. (Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.)

1994-07-01T23:59:59.000Z

107

CFD calculations of S809 aerodynamic characteristics  

SciTech Connect (OSTI)

Steady-state, two-dimensional CFD calculations were made for the S809 laminar-flow, wind-turbine airfoil using the commercial code CFD-ACE. Comparisons of the computed pressure and aerodynamic coefficients were made with wind tunnel data from the Delft University 1.8 m x 1.25 m low-turbulence wind tunnel. This work highlights two areas in CFD that require further investigation and development in order to enable accurate numerical simulations of flow about current generation wind-turbine airfoils: transition prediction and turbulence modeling. The results show that the laminar-to-turbulent transition point must be modeled correctly to get accurate simulations for attached flow. Calculations also show that the standard turbulence model used in most commercial CFD codes, the k-{epsilon} model, is not appropriate at angles of attack with flow separation.

Wolfe, W.P. [Sandia National Labs., Albuquerque, NM (United States); Ochs, S.S. [Iowa State Univ., Ames, IA (United States)

1997-01-01T23:59:59.000Z

108

Applications of Proper Orthogonal Decomposition for Inviscid Transonic Aerodynamics  

E-Print Network [OSTI]

Two extensions to the proper orthogonal decomposition (POD) technique are considered for steady transonic aerodynamic applications. The first is to couple the POD approach with a cubic spline interpolation procedure in ...

Tan, Bui-Thanh

109

Mathematical simulation of wind-wheel aerodynamic performances  

Science Journals Connector (OSTI)

A mathematical model of wind-wheel aerodynamic performances for a wind-power plant is developed. This model makes it possible to both calculate wind turbine performance and recover it for any blade pitch angles.

P. S. Tsgoev

2009-11-01T23:59:59.000Z

110

Flow visualization and analysis of aerodynamically detuned supersonic rotors  

Science Journals Connector (OSTI)

The effect of aerodynamic detuning on the supersonic steady and unsteady blade passage flow field is experimentally investigated on a free surface water table by means of color Schlieren and shadowgraph flow v...

C. S. Farmer; S. Fleeter

1988-01-01T23:59:59.000Z

111

Structural and Aerodynamic Interaction Computational Tool for Highly Reconfigurable Wings  

E-Print Network [OSTI]

of the aerospace industry, and a reconfigurable wing is a significant element of a morphing aircraft. This thesis develops two tools for analyzing wing configurations with multiple geometric degrees-of-freedom: the structural tool and the aerodynamic and structural...

Eisenbeis, Brian Joseph

2011-10-21T23:59:59.000Z

112

Aerodynamic Design for Swept-wing Laminar Flow  

E-Print Network [OSTI]

This work describes and compares processes for swept-wing laminar flow control (SWLFC) aerody-namic design. It focuses on results obtained during the preliminary outer-mold-line (OML) design of the Subsonic Aircraft Roughness Glove Experiment...

Belisle, Michael Joseph

2013-11-08T23:59:59.000Z

113

American Institute of Aeronautics and Astronautics AERODYNAMIC OPTIMIZATION FOR FREIGHT  

E-Print Network [OSTI]

American Institute of Aeronautics and Astronautics 1 AERODYNAMIC OPTIMIZATION FOR FREIGHT TRUCKS and Astronautics 2 controls,4 , flight trajectories,5 wings and airfoils,6,7,9,10 inlets,14 rockets,16,19 missiles

Roy, Chris

114

Inequality design limits in optimal aerodynamic shapes  

E-Print Network [OSTI]

of friction. A solution is developed from the variational problem relating the slope of the profile providing the maximum lift-to-drag ratio with the lower bound of the inequality con- straint. CONTENTS Chapter Page INTRODUCTION III IV CALCULUS... variation Lagrangian multiplier Equality constraint CHAPTER I INTRODUCTION The calculus of variations is a branch of calculus concerned with the optimization of integral functions. Considerable interest exists in the use of this branch of calculus...

Seaman, Charles Knight

2012-06-07T23:59:59.000Z

115

Title: Aerodynamic and Scalar Roughness over Snow and Sea Ice In Monin-Obukhov similarity theory, the aerodynamic roughness, z0, is the artificial height  

E-Print Network [OSTI]

Title: Aerodynamic and Scalar Roughness over Snow and Sea Ice Abstract: In Monin-Obukhov similarity theory, the aerodynamic roughness, z0, is the artificial height above the surface at which the wind speed the theory and measurement of the aerodynamic and scalar roughness lengths over snow and sea ice. The data

116

* ^ -^. «*'*: IV: .<:.**  

Gasoline and Diesel Fuel Update (EIA)

* ^ -^. «*'*: IV: .<:.**,.,? '* -^^V; , *"'^"T-'^T * .^'^ **'*--'"-* *'*V-; "'^ v ^V ^^-^^;-'jl^'-^^i5^^v>^Ll-';.i»S-'^^^ * . '"* L"".'"-'?_,. -*'-_*:'?'. v>;': |: ,^% ;'. >' 4-.**;- *"-.''' * Lite -^ t.-^»!, m ". *Bfc' Table 8. Foreign Crude Oil and Natural Gas Liquids Reserve Interest for FRS Companies, 1983 and Percent Change from 1982 Crude Oil and Reserves Total OECD Foreign___Canada___Europe Africa___Mtdeast Other Eastern Hemisphere Other Western Hemisphere 1983 (million barrels) Total Crude and |GL

117

Aerodynamic characteristics of a feathered dinosaur measured using physical models. Effects of form on static stability and control effectiveness  

E-Print Network [OSTI]

2007) Fundamentals of Aerodynamics. New York, NY: McGraw-31. McCormick BW (1995) Aerodynamics, Aeronautics and FlightA computational study of the aerodynamics and forewing-

Evangelista, Dennis

2013-01-01T23:59:59.000Z

118

Aerodynamic Analysis of Intermodal Freight Trains Using Machine Vision World Congress on Railway Research, May 22-26, 2011  

E-Print Network [OSTI]

Aerodynamic Analysis of Intermodal Freight Trains Using Machine Vision 9 th World Congress. However, intermodal trains use rolling stock that generates significantly greater aerodynamic drag increases annual operating expenditures. There are opportunities to improve intermodal train aerodynamics

Illinois at Urbana-Champaign, University of

119

WING TIP ANATOMY AND AERODYNAMICS IN FLYING National Museum of Natural History, Department of Vertebrate Zoology,  

E-Print Network [OSTI]

WING TIP ANATOMY AND AERODYNAMICS IN FLYING SQUIRRELS National Museum of Natural History aerodynamically sophisticat- back into a curve by the tibiocarpalis mus- ed. They are able to modify shape

Mathis, Wayne N.

120

Aeolian sediment transport pathways and aerodynamics at troughs Mary C. Bourke1  

E-Print Network [OSTI]

Aeolian sediment transport pathways and aerodynamics at troughs on Mars Mary C. Bourke1 School pathways and aerodynamics at troughs on Mars, J. Geophys. Res., 109, E07005, doi:10.1029/2003JE002155. 1

Bourke, Mary C.

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Aerodynamic Focusing of High-Density Aerosols D.E. Ruiza,  

E-Print Network [OSTI]

Aerodynamic Focusing of High-Density Aerosols D.E. Ruiza, , L. Gundersona , M.J. Haya , E. Merinob-density aerosol focusing for 1µm silica spheres. Preliminary results recover previous findings on aerodynamic

122

Film Cooling, Heat Transfer and Aerodynamic Measurements in a Three Stage Research Gas Turbine  

E-Print Network [OSTI]

turbine rotational speeds namely, 2400rpm, 2550rpm and 3000rpm. Interstage aerodynamic measurements with miniature five hole probes are also acquired at these speeds. The aerodynamic data characterizes the flow along the first stage rotor exit, second...

Suryanarayanan, Arun

2010-07-14T23:59:59.000Z

123

Unsteady aerodynamic forces on small-scale wings: experiments, simulations and models  

E-Print Network [OSTI]

Unsteady aerodynamic forces on small-scale wings: experiments, simulations and models Steven L for the unsteady aerodynamics. It is possible to obtain reduced order models by projective methods such as balanced

Dabiri, John O.

124

Product design and development of an aerodynamic hydration system for bicycling and triathlon  

E-Print Network [OSTI]

Proper hydration and aerodynamic performance are both essential needs of a competitive cyclist or triathlete. Several aerodynamic systems have been developed for use on bicycles but few have been designed to be truly ...

Cote, Mark (Mark Brian)

2007-01-01T23:59:59.000Z

125

E-Print Network 3.0 - aerodynamic test facilities Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

test facilities Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic test facilities Page: << < 1 2 3 4 5 > >> 1 A Tour of the Aerodynamic...

126

Aerodynamic Effects in Weakly Ionized Gas: Phenomenology and Applications  

SciTech Connect (OSTI)

Aerodynamic effects in ionized gases, often neglected phenomena, have been subject of a renewed interest in recent years. After a brief historical account, we discuss a selected number of effects and unresolved problems that appear to be relevant in both aeronautic and propulsion applications in subsonic, supersonic, and hypersonic flow. Interaction between acoustic shock waves and weakly ionized gas is manifested either as plasma-induced shock wave dispersion and acceleration or as shock-wave induced double electric layer in the plasma, followed by the localized increase of the average electron energy and density, as well as enhancement of optical emission. We describe the phenomenology of these effects and discuss several experiments that still do not have an adequate interpretation. Critical for application of aerodynamic effects is the energy deposition into the flow. We classify and discuss some proposed wall-free generation schemes with respect to the efficiency of energy deposition and overall generation of the aerodynamic body force.

Popovic, S.; Vuskovic, L. [Department of Physics, Old Dominion University, Norfolk, Virginia (United States)

2006-12-01T23:59:59.000Z

127

Joint computational and experimental aerodynamics research on a hypersonic vehicle  

SciTech Connect (OSTI)

A closely coupled computational and experimental aerodynamics research program was conducted on a hypersonic vehicle configuration at Mach 8. Aerodynamic force and moment measurements and flow visualization results were obtained in the Sandia National Laboratories hypersonic wind tunnel for laminar boundary layer conditions. Parabolized and iterative Navier-Stokes simulations were used to predict flow fields and forces and moments on the hypersonic configuration. The basic vehicle configuration is a spherically blunted 10{degrees} cone with a slice parallel with the axis of the vehicle. On the slice portion of the vehicle, a flap can be attached so that deflection angles of 10{degrees}, 20{degrees}, and 30{degrees} can be obtained. Comparisons are made between experimental and computational results to evaluate quality of each and to identify areas where improvements are needed. This extensive set of high-quality experimental force and moment measurements is recommended for use in the calibration and validation of computational aerodynamics codes. 22 refs.

Oberkampf, W.L.; Aeschliman, D.P.; Walker, M.M.

1992-01-01T23:59:59.000Z

128

Investigation of aerodynamic braking devices for wind turbine applications  

SciTech Connect (OSTI)

This report documents the selection and preliminary design of a new aerodynamic braking system for use on the stall-regulated AWT-26/27 wind turbines. The goal was to identify and design a configuration that offered improvements over the existing tip brake used by Advanced Wind Turbines, Inc. (AWT). Although the design objectives and approach of this report are specific to aerodynamic braking of AWT-26/27 turbines, many of the issues addressed in this work are applicable to a wider class of turbines. The performance trends and design choices presented in this report should be of general use to wind turbine designers who are considering alternative aerodynamic braking methods. A literature search was combined with preliminary work on device sizing, loads and mechanical design. Candidate configurations were assessed on their potential for benefits in the areas of cost, weight, aerodynamic noise, reliability and performance under icing conditions. As a result, two configurations were identified for further study: the {open_quotes}spoiler-flap{close_quotes} and the {open_quotes}flip-tip.{close_quotes} Wind tunnel experiments were conducted at Wichita State University to evaluate the performance of the candidate aerodynamic brakes on an airfoil section representative of the AWT-26/27 blades. The wind tunnel data were used to predict the braking effectiveness and deployment characteristics of the candidate devices for a wide range of design parameters. The evaluation was iterative, with mechanical design and structural analysis being conducted in parallel with the braking performance studies. The preliminary estimate of the spoiler-flap system cost was $150 less than the production AWT-26/27 tip vanes. This represents a reduction of approximately 5 % in the cost of the aerodynamic braking system. In view of the preliminary nature of the design, it would be prudent to plan for contingencies in both cost and weight.

Griffin, D.A. [R. Lynette & Associates, Seattle, WA (United States)

1997-04-01T23:59:59.000Z

129

E-Print Network 3.0 - airfoil aerodynamic performance Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Compressors... Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... -dimensional airfoil diffuser designs is presented....

130

Reentry aerodynamic disruption analysis of thermionic reactor-thermo-converter TOPAZ-2  

SciTech Connect (OSTI)

This paper presents preliminary results of analysis for the TOPAZ-2 thermionic converter-reactor aerodynamic disruption during reentry.

Grinberg, E.I.; Nikolaev, V.S. (Scientific Production Association Krasnaya Zvezda'', Moscow 115230 (Russian Federation)); Usov, V.A. (RRC Kurchatov Institute'', Moscow 123182 (Russian Federation)); Gafarov, A.A. (Research Institute of Thermal Processes, Moscow (Russian Federation))

1993-01-15T23:59:59.000Z

131

ACARS Aerodynamic (Research Incorporated) Communication and Recording System  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ix ix Acrononyms and Abbreviations Acronyms and Abbreviations ACARS Aerodynamic (Research Incorporated) Communication and Recording System ACSYS Arctic Climate System Study AER Atmospheric Environmental Research, Inc. AERI Atmospheric Emitted Radiance Interferometer AFOSR Air Force Office of Scientific Research AGARD Advisory Group for Aerospace Research and Development ALFA AER Local Forecast and Assimilation (model) AMIP Atmospheric Model Intercomparison Project ARCS Atmosphere Radiation and Cloud Stations ARCSS Arctic System Science (NSF) ARCSYM Arctic Regional Climate System Model ARINC Aerodynamic Research Incorporated Communication ARM Atmospheric Radiation Measurement program AS anvil stratus ASTER Atmosphere-Surface Turbulent Exchange Research ASTEX Altantic Stratocumulus Transition EXperiment

132

Progress in Aerospace Sciences 39 (2003) 185248 The unsteady aerodynamics of slender wings and aircraft  

E-Print Network [OSTI]

Progress in Aerospace Sciences 39 (2003) 185­248 The unsteady aerodynamics of slender wings nonlinearities and flow field time lags. The aerodynamic and the vortical flow structure over simple delta wings of leading-edge vortices and their influence on delta wing aerodynamics for stationary models is presented

Nelson, Robert C.

133

International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014  

E-Print Network [OSTI]

49th International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014 FP05-2014-paquet Formulation of Aerodynamic Forces on Helicopters in Non Uniform Flow with Scale Model Tests : Ground Effects. The number of state variables influencing the aerodynamic forces are too numerous so it is not possible

134

The Effects of Turbulence on the Aerodynamics of Oscillating Fred L. Haan, Jr a  

E-Print Network [OSTI]

The Effects of Turbulence on the Aerodynamics of Oscillating Prisms Fred L. Haan, Jr a , Ahsan ABSTRACT: This experimental study, focusing on the effects of turbulence on long-span bridge aerodynamics and the spanwise correlation of the overall aerodynamic lift and moment. This exami- nation was conducted

Kareem, Ahsan

135

International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014  

E-Print Network [OSTI]

49th International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014 FP04-2014-arntz Numerical Airframe Aerodynamic Performance Prediction: An Exergy Point of View Aurélien Arntz, Olivier.arntz@onera.fr, olivier.atinault@onera.fr, daniel.destarac@onera.fr ABSTRACT The prediction of the aerodynamic performance

136

Courses for Breadth Requirement of Aerospace Engineering M.S. Degree Aerodynamics,  

E-Print Network [OSTI]

Courses for Breadth Requirement of Aerospace Engineering M.S. Degree Program Aerodynamics, Fluid Mechanics, Combustion and Propulsion (AFMCP) AE 410/CSE 461: Computational Aerodynamics AE 412/ME 411: Viscous Flow & Heat Transfer AE 416: Applied Aerodynamics AE 419: Aircraft Flight Mechanics AE 433

Gilbert, Matthew

137

25th AIAA Applied Aerodynamics Conference June 2528, 2007/Miami, FL  

E-Print Network [OSTI]

25th AIAA Applied Aerodynamics Conference June 25­28, 2007/Miami, FL Validation Study of Aerodynamic Analysis Tools for Design Optimization of Helicopter Rotors Seongim Choi , Juan J. Alonso , Edwin current aerodynamic analysis tools in predicting the unsteady flow field generated by helicopter rotors

Alonso, Juan J.

138

International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014  

E-Print Network [OSTI]

49th International Symposium of Applied Aerodynamics Lille, 24-25-26 March 2014 FP30-2014-toubin on the environment. In order to achieve these ambitious objectives, several ways can be chosen, such as aerodynamic by integrating aerodynamic stresses on the skin (near-field methods), one can equivalently analyze

139

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines  

E-Print Network [OSTI]

Effect of Dynamic Stall on the Aerodynamics of Vertical-Axis Wind Turbines Frank Scheurich of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid of the aerodynamics of a vertical- axis wind turbine that consists of three curved rotor blades that are twisted

McCalley, James D.

140

Aerodynamic Stability and the Growth of Triangular Snow Crystals K. G. Libbrecht and H. M. Arnold  

E-Print Network [OSTI]

Aerodynamic Stability and the Growth of Triangular Snow Crystals K. G. Libbrecht and H. M. Arnold growth perturbations of the more-typical hexagonal forms. We then describe an aerodynamic model leads to air flow around the crystal that promotes the growth of alternating facets. Aerodynamic effects

Libbrecht, Kenneth G.

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Monitoring the Aerodynamic Efficiency of Intermodal Train Loading Using Machine Vision  

E-Print Network [OSTI]

Monitoring the Aerodynamic Efficiency of Intermodal Train Loading Using Machine Vision TRB 11 transported by North American railroads. Intermodal trains, however, use equipment that is not aerodynamically significant aerodynamic drag. This high resistance associated with the movement of intermodal trains results

Illinois at Urbana-Champaign, University of

142

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows  

E-Print Network [OSTI]

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows Vladimir V and numerical studies [1-4] of aerodynamics of simple shape bodies have provided valuable information related not be used to define the aerodynamics of side-by-side bodies. Flow about two side-by-side cylinders

Riabov, Vladimir V.

143

Aerodynamically Optimal Regional Aircraft Concepts: Conventional and Blended Wing-Body Designs  

E-Print Network [OSTI]

Aerodynamically Optimal Regional Aircraft Concepts: Conventional and Blended Wing-Body Designs aircraft such as those that serve regional routes. We thus explore the optimal aerodynamic shape of both a blended wing-body and conventional tube-and-wing regional aircraft through high-fidelity aerodynamic shape

Zingg, David W.

144

IMPACT OF TIRE AND AERODYNAMIC AIDS ON TRUCK PERFORMANCE ALONG UPGRADE SECTIONS  

E-Print Network [OSTI]

IMPACT OF TIRE AND AERODYNAMIC AIDS ON TRUCK PERFORMANCE ALONG UPGRADE SECTIONS Hesham Rakha1 and aerodynamics aids on the truck acceleration behavior. The objectives of this paper are two-fold. First of vehicle tires, the vehicle's aerodynamic features, the percentage mass on the tractive axle

Rakha, Hesham A.

145

215BAT AERODYNAMICS Revista Chilena de Historia Natural 78: 215-227, 2005  

E-Print Network [OSTI]

215BAT AERODYNAMICS Revista Chilena de Historia Natural 78: 215-227, 2005 Biomechanical and negatively with the mass corrected wingspan and the second component with the aerodynamic efficiency, showing a high aerodynamic efficiency; (3) most of vespertilionids were in the zone of low speed

146

RANS-based Aerodynamic Shape Optimization Investigations of the Common Research Model Wing  

E-Print Network [OSTI]

RANS-based Aerodynamic Shape Optimization Investigations of the Common Research Model Wing Zhoujie of Michigan, Ann Arbor, MI The aerodynamic shape optimization of transonic wings requires Reynolds, and viscous effects. While there has been some research dedicated to RANS-based aerodynamic shape optimiza

Papalambros, Panos

147

SPIE Aerosense, Vol. 4394, paper 108, April 2001 Aerodynamic sampling for landmine trace detection  

E-Print Network [OSTI]

SPIE Aerosense, Vol. 4394, paper 108, April 2001 Aerodynamic sampling for landmine trace detection research on canine olfactory aerodynamics revealed several ways that evolution has dealt with such problems source, 3) use an aerodynamic collar on the sniffer inlet, 4) use auxiliary airjets to stir up surface

Settles, Gary S.

148

Aerodynamic Loads on Tall Buildings: Interactive Database Yin Zhou. M.ASCE1  

E-Print Network [OSTI]

Aerodynamic Loads on Tall Buildings: Interactive Database Yin Zhou. M.ASCE1 ; Tracy Kijewski, S database of aerodynamic loads is presented, which can be accessed by any user with Microsoft Explorer, the nondimensional aerodynamic loads can be used to compute the wind-induced response of tall buildings

Kareem, Ahsan

149

Fluid-Structure Interaction Simulations of a Tension-Cone Inflatable Aerodynamic Decelerator  

E-Print Network [OSTI]

Fluid-Structure Interaction Simulations of a Tension-Cone Inflatable Aerodynamic Decelerator of an aerodynamic tension-cone supersonic decelerator prototype intended for large mass payload deploy- ment. Introduction The concept of the inflatable aerodynamic decelerator (IAD) was first proposed in the 1960's

Cirak, Fehmi

150

The Analysis of Underexpanded Jet Flows for Hypersonic Aerodynamic Experiments in  

E-Print Network [OSTI]

The Analysis of Underexpanded Jet Flows for Hypersonic Aerodynamic Experiments in Vacuum Chambers V of rarefied-gas flows [1]- [3] and aerodynamics of hypersonic probes in wind tunnels [4]-[7]. The objective using quantum concepts [9], [10]. Aerodynamic characteristics of wedges, disks, and plates are studied

Riabov, Vladimir V.

151

Concurrent Aerodynamic Optimization of Rotor Blades Using a Nash Game Method  

E-Print Network [OSTI]

Concurrent Aerodynamic Optimization of Rotor Blades Using a Nash Game Method Enric Roca Le´on Ph Aerodynamics Leader, Airbus Helicopter, Marignane, France Michel Costes Research Engineer, ONERA, Meudon OF THE AMERICAN HELICOPTER SOCIETY Abstract A multi-objective strategy adapted to the aerodynamic concurrent

Paris-Sud XI, Université de

152

PHYSICAL REVIEW E 87, 053021 (2013) Unsteady aerodynamic forces and torques on falling parallelograms in coupled  

E-Print Network [OSTI]

PHYSICAL REVIEW E 87, 053021 (2013) Unsteady aerodynamic forces and torques on falling, these trajectories provide an ideal set of data to analyze 3D aerodynamic force and torque at an intermediate range of Reynolds numbers, and the results will be useful for constructing 3D aerodynamic force and torque models

Wang, Z. Jane

153

Evaluation of the acoustic and aerodynamic constraints of a pneumotachograph for speech and voice studies  

E-Print Network [OSTI]

Evaluation of the acoustic and aerodynamic constraints of a pneumotachograph for speech and voice from its transfer function. 1. INTRODUCTION The measurement of the aerodynamic parameters for the study. The object of this study is to evaluate and correct the acoustic and aerodynamic distortions generated

Paris-Sud XI, Université de

154

GAs for aerodynamic shape design II: multiobjective optimization and multi-criteria design  

E-Print Network [OSTI]

GAs for aerodynamic shape design II: multiobjective optimization and multi-criteria design D, and on their application to multi-criteria design problems. A short introduction to multi- point aerodynamic shape design-lift conditions, and to transonic wing design. 1 Introduction The aerodynamic design problem can be defined

Coello, Carlos A. Coello

155

Error estimation and anisotropic mesh refinement for 3d laminar aerodynamic flow simulations  

E-Print Network [OSTI]

Error estimation and anisotropic mesh refinement for 3d laminar aerodynamic flow simulations Tobias Leichta,b , Ralf Hartmann,a,b aInstitute of Aerodynamics and Flow Technology, DLR (German Aerospace Center-dimensional laminar aerodynamic flow simulations. The optimal order symmetric interior penalty discontinuous Galerkin

Hartmann, Ralf

156

Development of flexible, intuitive methods for aerodynamic design Type of award PhD Research Studentship  

E-Print Network [OSTI]

Development of flexible, intuitive methods for aerodynamic design Type of award PhD Research is beginning a project to develop new techniques for aerodynamic design. The interest is based around free, they are offering a fully funded 3- year PhD position within the University of Bristol Aerodynamics research group

Bristol, University of

157

Introduction Aerodynamic theory adapted for avian flight (e.g. Tucker,  

E-Print Network [OSTI]

3489 Introduction Aerodynamic theory adapted for avian flight (e.g. Tucker, 1975; Pennycuick, 1989 encompassing optimal foraging and aerodynamic theories. The main hypothesis underlying our model flight strategy selection. We develop a model based on optimal foraging and aerodynamic theories

Loon, E. Emiel van

158

Agricultural and Forest Meteorology 111 (2002) 93108 Estimation of the three-dimensional aerodynamic structure  

E-Print Network [OSTI]

-dimensional aerodynamic structure of a green ash shelterbelt X.H. Zhoua,, J.R. Brandlea, E.S. Takleb,c, C.W. Mized Abstract The three-dimensional aerodynamic structure of a tree shelterbelt is described by two structural be predicted by associating its aerodynamic influence with its struc- ture. The more complex the shelterbelt

Takle, Eugene S.

159

Laboratory Evaluation of Fan-filter Units' Aerodynamic and Energy Performance  

E-Print Network [OSTI]

Laboratory Evaluation of Fan-filter Units' Aerodynamic and Energy Performance Tengfang Xu, Lawrence The paper discusses the benefits of having a consistent testing method to characterize aerodynamic applications. Optimizing aerodynamic performance in air recirculation systems appears to be one of useful

160

Global Optimization Methods for the Aerodynamic Shape Design of Transonic Cascades  

E-Print Network [OSTI]

Global Optimization Methods for the Aerodynamic Shape Design of Transonic Cascades T. Mengistu algorithms, namely Genetic Algorithm (GA) and Simulated Annealing (SA), have been applied to the aerodynamic reduction in total pressure loss by eliminating the passage shock. 1. INTRODUCTION Aerodynamic optimization

Neumaier, Arnold

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Experimental investigation of the aerodynamic noise radiated by a three-dimensional bluff body  

E-Print Network [OSTI]

Experimental investigation of the aerodynamic noise radiated by a three-dimensional bluff body J.fischer@univ-poitiers.fr Proceedings of the Acoustics 2012 Nantes Conference 23-27 April 2012, Nantes, France 2335 #12;Aerodynamic. The present work is an experimental study of the aerodynamic noise radiated by a three-dimensional simplified

Paris-Sud XI, Université de

162

On the limiting aerodynamic roughness of the ocean in very strong winds  

E-Print Network [OSTI]

On the limiting aerodynamic roughness of the ocean in very strong winds M. A. Donelan,1 B. K. Haus January 2004; accepted 13 August 2004; published 28 September 2004. [1] The aerodynamic friction between, the ``aerodynamic roughness'') increases with the wind speed. Can one merely extrapolate this wind speed tendency

Saltzman, Eric

163

Vocal fold and ventricular fold vibration in period-doubling phonation: Physiological description and aerodynamic  

E-Print Network [OSTI]

and aerodynamic modelinga) Lucie Bailly,b Nathalie Henrich, and Xavier Pelorson Département Parole et Cognition and ventricular areas, the aerodynamic behavior of the laryngeal system is simulated using a simplified physical aerodynamic interaction. Previous experimental in- vestigations dealing with in vitro set

Boyer, Edmond

164

Improvements to a Newton-Krylov Adjoint Algorithm for Aerodynamic Optimization  

E-Print Network [OSTI]

Improvements to a Newton-Krylov Adjoint Algorithm for Aerodynamic Optimization David W. Zingg-based algorithm for aerodynamic optimization. A Newton-Krylov algorithm is used to solve the compressible Navier of the improvements on the performance of the algorithm is presented. I. Introduction Numerical aerodynamic shape

Zingg, David W.

165

Surface-Skimming Stoneflies and Mayflies: The Taxonomic and Mechanical Diversity of Two-Dimensional Aerodynamic  

E-Print Network [OSTI]

-Dimensional Aerodynamic Locomotion* James H. Marden Brigid C. O'Donnell Michael A. Thomas Jesse Y. Bye Department be used to accomplish two-dimensional aerodynamic locomotion on the surface of water. Here we extend, horizontal velocity, and the verticality of aerodynamic force production increase as the body orientation

Marden, James

166

Aerodynamic focusing of high-density aerosols D.E. Ruiz a,n  

E-Print Network [OSTI]

Aerodynamic focusing of high-density aerosols D.E. Ruiz a,n , L.M. Gunderson a , M.J. Hay a , E Accepted 24 May 2014 Available online 17 June 2014 Keywords: Aerodynamic lens High-density aerosol beam recover previous findings on aerodynamic focusing at low densities. At higher densities

167

Advances in Modeling of Aerodynamic Forces on Bridge Xinzhong Chen1  

E-Print Network [OSTI]

Advances in Modeling of Aerodynamic Forces on Bridge Decks Xinzhong Chen1 and Ahsan Kareem2 Abstract: Aerodynamic forces on bridges are commonly separated into static, self-excited, and buffeting in modeling aerodynamic forces. Formulations for airfoil sections and those based on quasi- steady theory

Chen, Xinzhong

168

Development of New Grid-Fin Design for Aerodynamic Marco Debiasi1  

E-Print Network [OSTI]

1 Development of New Grid-Fin Design for Aerodynamic Control Marco Debiasi1 Temasek Laboratories of attack = angle of the sharp leading edge = swept-back angle I. Introduction grid fin is an aerodynamic Aerodynamics Conference, Chicago, Illinois, 28 June - 1 July 2010, and as Paper 2012-2909 at the 30th AIAA

Debiasi, Marco

169

Determination of the Aerodynamic Characteristics of Low Reynolds Number Flows over Small Uninhabited Aerial Vehicles  

E-Print Network [OSTI]

Determination of the Aerodynamic Characteristics of Low Reynolds Number Flows over Small, in the 15000 - 500000 range. The high Re aerodynamics is well established, however the same cannot be said for the low Re regime. In this range the wing's aerodynamic performance can deteriorate rapidly as the Re

Olsen, Stephen L.

170

Design Optimization of MultiElement Aerodynamic Configurations Using a Viscous  

E-Print Network [OSTI]

Design Optimization of Multi­Element Aerodynamic Configurations Using a Viscous Adjoint Method.S.A An adjoint-based Navier-Stokes design and optimization method for multi-element aerodynamic configurations effects. Using a viscous continuous adjoint formulation, the necessary aerodynamic gradient information

Kim, Sangho

171

Aerodynamic and aeroacoustic analysis of morphing Type of award PhD Research Studentship  

E-Print Network [OSTI]

Aerodynamic and aeroacoustic analysis of morphing structures Type of award PhD Research Studentship with a strong interest in aerodynamics. Deadline Open until filled. PhD Topic Background/Description Applications are invited for a research studentship in the field of aerodynamics and aeroacoustics, leading

Bristol, University of

172

NONLINEAR AERODYNAMIC ANALYSIS OF BRIDGES UNDER TURBULENT WINDS: THE NEW FRONTIER IN BRIDGE  

E-Print Network [OSTI]

NONLINEAR AERODYNAMIC ANALYSIS OF BRIDGES UNDER TURBULENT WINDS: THE NEW FRONTIER IN BRIDGE AERODYNAMICS Xinzhong Chen , Ahsan Kareem and Fred L. Haan, Jr. ¡ Department of Civil Engineering. These approaches are limited to linear structures in which nonlinearities in aerodynamic forces are ignored

Kareem, Ahsan

173

EnvWiltonIV-EIS  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Wilton IV Wind Energy Center Draft EIS Wilton IV Wind Energy Center Draft EIS Western Area Power Administration (Western) prepared this draft environmental impact statement (DEIS) in response to a request from NextEra Energy Resources, LLC (NextEra), on behalf of its subsidiary Wilton Wind IV, LLC (Wilton IV), to interconnect its proposed Wilton IV Wind Energy Center (Project) to Western's power transmission system. The proposed Project is a wind turbine generation facility located in Burleigh County, North Dakota. It would consist of 62 wind turbine generators, with a total nameplate capacity of approximately 99 MW. NextEra has also requested that the existing interconnection contracts for the Wilton Wind I Energy Center (formerly known as Burleigh County Wind), Wilton Wind II Energy Center, and the Baldwin Wind Energy Center (together called the Existing Projects) be modified to lift their administrative 50 average annual MW production caps.

174

Current trends in modelling research for turbulent aerodynamic flows  

Science Journals Connector (OSTI)

...specific heats (c p/c v) and R is the gas constant. The presence of the turbulent...over and downstream of airfoils, wings, turbine blades or aerodynamic bodies. It is necessary...Navier-Stokes equations: properties of the residual stress. Phys. Fluids. 15, 2127-2140...

2007-01-01T23:59:59.000Z

175

Aerodynamic Drag Reduction Apparatus For Wheeled Vehicles In Ground Effect  

DOE Patents [OSTI]

An apparatus for reducing the aerodynamic drag of a wheeled vehicle in a flowstream, the vehicle having a vehicle body and a wheel assembly supporting the vehicle body. The apparatus includes a baffle assembly adapted to be positioned upstream of the wheel assembly for deflecting airflow away from the wheel assembly so as to reduce the incident pressure on the wheel assembly.

Ortega, Jason M. (Pacifica, CA); Salari, Kambiz (Livermore, CA)

2005-12-13T23:59:59.000Z

176

Aerodynamic performance measurements of a film-cooled turbine stage  

E-Print Network [OSTI]

The goal of this research is to measure the aerodynamic performance of a film-cooled turbine stage and to quantify the loss caused by film-cooling. A secondary goal of the research is to provide a detailed breakdown of the ...

Keogh, Rory (Rory Colm), 1968-

2001-01-01T23:59:59.000Z

177

Aerodynamic Optimization Under a Range of Operating Conditions  

E-Print Network [OSTI]

Aerodynamic Optimization Under a Range of Operating Conditions David W. Zingg and Samy Elias. This can be achieved through multipoint optimization. The desired performance objective and operating conditions must be speci ed, and the resulting optimization problem must be solved in such a manner

Zingg, David W.

178

Adapting to Limitations of a Wind Tunnel Test Facility in the Aerodynamic Testing of a new UAV  

E-Print Network [OSTI]

Adapting to Limitations of a Wind Tunnel Test Facility in the Aerodynamic Testing of a new UAV Dr K section for aerodynamic tests of aircraft models and aerodynamic devices. Improvements over the years have aerodynamic testing facility, albeit with much reduced capability. This paper reports on initial progress

Wong, K. C.

179

Generation IV International Forum Updates Technology Roadmap...  

Office of Environmental Management (EM)

nuclear energy Generation IV International Forum Signs Agreement to Collaborate on Sodium Cooled Fast Reactors China and Russia to Join the Generation IV International Forum...

180

Category IV Dixon Recreation Center  

E-Print Network [OSTI]

Category IV Dixon Recreation Center BB or VB court $60 RB/Squash court $45 Multipurpose Room $60 for any rental that is cancelled with less than seven days notice Department of Recreational Sports

Escher, Christine

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Alta IV | Open Energy Information  

Open Energy Info (EERE)

IV IV Jump to: navigation, search Name Alta IV Facility Alta IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Terra-Gen Power Developer Terra-Gen Power Energy Purchaser Southern California Edison Co Location Tehachapi Pass CA Coordinates 35.01917213°, -118.3031845° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.01917213,"lon":-118.3031845,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

182

Influence of a humidor on the aerodynamics of baseballs  

E-Print Network [OSTI]

We investigate whether storing baseballs in a controlled humidity environment significantly affects their aerodynamic properties. To do this, we measure the change in diameter and mass of baseballs as a function of relative humidity (RH) in which the balls are stored. We then model trajectories for pitched and batted baseballs to assess the difference between those stored at 30% RH versus 50% RH. The results show that a drier baseball may be expected to curve slightly more than a humidified one for a given pitch velocity. We also find that the aerodynamics alone would add ~2 feet to the distance a moister ball is hit. However, this is compensated by a ~6 foot reduction in batted distance due to the well known change in coefficient of restitution of the ball. We discuss consequences of these results for baseball played at Coors Field in Denver, where baseballs have been stored in a humidor at 50% RH since 2002.

Edmund Meyer; John Bohn

2008-02-29T23:59:59.000Z

183

Predicting aerodynamic characteristic of typical wind turbine airfoils using CFD  

SciTech Connect (OSTI)

An investigation was conducted into the capabilities and accuracy of a representative computational fluid dynamics code to predict the flow field and aerodynamic characteristics of typical wind-turbine airfoils. Comparisons of the computed pressure and aerodynamic coefficients were made with wind tunnel data. This work highlights two areas in CFD that require further investigation and development in order to enable accurate numerical simulations of flow about current generation wind-turbine airfoils: transition prediction and turbulence modeling. The results show that the laminar-to turbulent transition point must be modeled correctly to get accurate simulations for attached flow. Calculations also show that the standard turbulence model used in most commercial CFD codes, the k-e model, is not appropriate at angles of attack with flow separation. 14 refs., 28 figs., 4 tabs.

Wolfe, W.P. [Sandia National Labs., Albuquerque, NM (United States); Ochs, S.S. [Iowa State Univ., Ames, IA (United States). Aerospace Engineering Dept.

1997-09-01T23:59:59.000Z

184

Shiloh IV | Open Energy Information  

Open Energy Info (EERE)

Shiloh IV Shiloh IV Facility Shiloh IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner EDF Renewable Energy Developer EDF Renewable Energy Energy Purchaser Pacific Gas & Electric Location Birds Landing CA Coordinates 38.13891092°, -121.8480349° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.13891092,"lon":-121.8480349,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

185

E-Print Network 3.0 - aerodynamic noise propagation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Biology and Medicine 5 AIAA-2004-1184 AN AEROACOUSTIC ANALYSIS OF WIND TURBINES* Summary: noise, the aerodynamics and aeroacoustics of rotating blades, and the...

186

E-Print Network 3.0 - aero-elasticity rotor aerodynamics Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: HVDC 12;Rotor aero-elastics and structural dynamics 12;Aerodynamics for wind turbines Flow over... and components Rotor aero-elastics and structural dynamics Grid...

187

DOEs Effort to Reduce Truck Aerodynamic Drag through Joint...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Experiments DOEs Effort to Reduce Truck Aerodynamic Drag through Joint Experiments Presentation from the U.S. DOE Office of Vehicle Technologies "Mega" Merit Review 2008 on...

188

E-Print Network 3.0 - aerodynamic design optimization Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic design optimization Page: << < 1 2 3 4 5 > >> 1 Aerospace Engineering Online by the...

189

DOEs Effort to Reduce Truck Aerodynamic Drag through Joint...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

D.C. vss14salari.pdf More Documents & Publications DOEs Effort to Reduce Truck Aerodynamic Drag through Joint Experiments and Computations Vehicle Technologies Office Merit...

190

DOEs Effort to Reduce Truck Aerodynamic Drag through Joint...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Experiments and Computations DOEs Effort to Reduce Truck Aerodynamic Drag through Joint Experiments and Computations 2010 DOE Vehicle Technologies and Hydrogen Programs Annual...

191

E-Print Network 3.0 - aerodynamics performance cooling Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Airfoil Summary: Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... are compared. The analysis is presented both in terms...

192

E-Print Network 3.0 - aerodynamics final technical Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Airfoil Summary: Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... as the detailed flow-field features. Finally Concluding...

193

E-Print Network 3.0 - aerodynamic noise reduction Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Control Seminar Series The Dynamics, Systems, and Control Seminar covers a broad range of topics of interest to the Summary: aerodynamic efficiency due to the reduction of induce...

194

E-Print Network 3.0 - aerodynamic size separator Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Control Seminar Series The Dynamics, Systems, and Control Seminar covers a broad range of topics of interest to the Summary: proximity aerodynamics information between two UAVs at...

195

Generation IV Nuclear Energy Systems ...  

E-Print Network [OSTI]

Generation IV Nuclear Energy Systems ... The U.S. Department of Energy's Office of Nuclear Energy enhance safety and security, and develop nuclear power as an energy source for industrial applications Information ... U.S. Department of Energy www.energy.gov DOE Office of Nuclear Energy www.nuclear

Kemner, Ken

196

Aerodynamic design considerations for a free-flying ducted propeller  

SciTech Connect (OSTI)

The design philosophy for a free-flying vehicle powered by a ducted propeller is presented from an aerodynamic viewpoint. Airframe design concentrates on duct inlet lip curvature, diffuser angle, and methods of vehicle control. Wind tunnel test results are given to evaluate two inlet designs, two exit designs, and the effect of external appendages such as a camera pod or a forebody. Finally, a simple, analytic method of ducted propeller blade design is presented and the results compared with an existing ducted propeller blade. 14 refs., 28 figs., 2 tabs.

Weir, R.J.

1988-01-01T23:59:59.000Z

197

Journal of Industrial Aerodynamics, 3 (1978) 251--257 251 Elsevier Scientific Publishing Company, Amsterdam --Printed in The Netherlands  

E-Print Network [OSTI]

Journal of Industrial Aerodynamics, 3 (1978) 251--257 251 © Elsevier Scientific Publishing Company strong vortices. Both of these properties were used in the design of the aerodynamic dampers which

Hunt, Julian

198

Bericht des Instituts f ur Aerodynamik und Str omungstechnik Report of the Institute of Aerodynamics and Flow Technology  

E-Print Network [OSTI]

of Aerodynamics and Flow Technology IB 124-2008/1 Discontinuous Galerkin Methods for inviscid low Mach number of Alessandra Nigro at the Institute of Aerodynamics and Flow Technology at the DLR, Braunschweig. This work has

Hartmann, Ralf

199

A Computational Method for Determining Distributed Aerodynamic Loads on Planforms of Arbitrary Shape in Compressible Subsonic Flow  

E-Print Network [OSTI]

The methods presented in this work are intended to provided an easy to understand and easy to apply method for determining the distributed aerodynamic loads and aerodynamic characteristics of planforms of nearly arbitrary shape. Through application...

Brown, Matthew Alan

2013-12-31T23:59:59.000Z

200

Characterization of an aerodynamic lens for transmitting particles greater than 1 micrometer in diameter into the Aerodyne aerosol mass spectrometer  

E-Print Network [OSTI]

We have designed and characterized a new inlet and aerodynamic lens for the Aerodyne aerosol mass spectrometer (AMS) that transmits particles between 80 nm and more than 3 ?m in vacuum aerodynamic diameter. The design of ...

Williams, L. R.

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Tracking an Aerodynamic Model in a Wind Tunnel with a Stereo High-speed Imaging System  

E-Print Network [OSTI]

Tracking an Aerodynamic Model in a Wind Tunnel with a Stereo High-speed Imaging System Lichuan Gui in wind tunnel tests with a stereo high-speed imaging system. The imaging system includes two high angle, pitch angle and yaw angle of the aerodynamic model in the wind tunnel. Tests and simulations were

Gui, Lichuan

202

WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES  

E-Print Network [OSTI]

1 WIND-TUNNEL STUDY ON AERODYNAMIC PERFORMANCE OF SMALL VERTICAL-AXIS WIND TURBINES J. J. Miau*1 were carried out to study the aerodynamic performance of three vertical axis wind turbines (VAWTs. On the other hand, the characteristics of unsteady flow around the helical wind turbine were studied with a hot

Leu, Tzong-Shyng "Jeremy"

203

Type IV Pilin Proteins: Versatile Molecular Modules  

Science Journals Connector (OSTI)

...2012 review-article Reviews Type IV Pilin Proteins...adaptable functional plan. The type IV pilin is...substrates. In this review, we consider recent...adaptable functional plan. The type IV pilin is...substrates. In this review, we consider recent...

Carmen L. Giltner; Ylan Nguyen; Lori L. Burrows

2012-12-01T23:59:59.000Z

204

Pressemitteilung Graduiertenkolleg Automatismen Media Transatlantic IV Traffic.  

E-Print Network [OSTI]

Pressemitteilung Graduiertenkolleg Automatismen Media Transatlantic IV ­ Traffic. Internationale untersuchen anlässlich der Tagung Media Transatlantic IV ­ Traffic an der Universität Paderborn die verselbstständigende und somit zunehmend unkontrollierbare Strukturen entstehen. Media Transatlantic IV ­ Traffic ist

Paderborn, Universität

205

Advanced numerical methods for analysis and design in aircraft aerodynamics  

Science Journals Connector (OSTI)

A review is presented of developments in recent years in computational methods for aerodynamic design and analysis. The discussion is mainly influenced by the industrial requirements and developments at Dornier. The need and use of computational aerodynamics in the design of aircraft and missile configurations is explored through several examples. These include synthesis-programs and predesign and evaluation work of aircraft and missile weapon systems, airfoil and high lift analysis and deign methodologies, three-dimensional transport- and fighter aircraft wing-body analysis methods for the complete speed range from subsonic to supersonic speed even including leading edge vortex flows, engine-inlet flows and interference problems. Besides the importance of advanced numerical schemes and fast large computers the cost-limiting factor of complex geometry handling and data pre- and post-processing is discussed. The use of these numerical methods has proved to substantially increase aircraft performance capabilities while reducing risk, flow time, and testing requirements and thus total costs. At the same time such methods are in use to analyse and improve current and future wind tunnel limitations like wall effects, flow angularity, and Reynolds number.

W. Schmidt

1986-01-01T23:59:59.000Z

206

Wind turbine trailing-edge aerodynamic brake design  

SciTech Connect (OSTI)

This report describes the design of a centrifugally actuated aerodynamic-overspeed device for a horizontal-axis wind turbine. The device will meet the following criteria; (1) It will be effective for airfoil angles of attack 0{degrees} to 45{degrees}. (2) It will be stowed inside the blade profile prior to deployment. (3) It will be capable of offsetting the positive torque produced by the overall blade. (4) Hinge moments will be minimized to lower actuator loads and cost. (5) It will be evaluated as a potential power modulating active rotor-control system. A literature review of aerodynamic braking devices was conducted. Information from the literature review was used to conceptualize the most effective devices for subsequent testing and design. Wind-tunnel test data for several braking devices are presented in this report. Using the data for the most promising configuration, a preliminary design was developed for a MICON 65/13 wind turbine with Phoenix 7.9-m rotor blades.

Quandt, G.

1996-01-01T23:59:59.000Z

207

American Institute of Aeronautics and Astronautics Paper 2009-1299 Unsteady Aerodynamics and Wing Kinematics Effect in  

E-Print Network [OSTI]

1 American Institute of Aeronautics and Astronautics Paper 2009-1299 Unsteady Aerodynamics and Wing of unsteady aerodynamic mechanisms such as wake capture, leading-edge vortex, Weis­Fogh "clap aerodynamics are of particular interests in this study. Simulations have shown that the vortex topologies

208

Estimation of the aerodynamic roughness length in arid and semi-arid regions over the globe with the ERS scatterometer  

E-Print Network [OSTI]

Estimation of the aerodynamic roughness length in arid and semi-arid regions over the globe 2005. [1] Estimates of the aerodynamic roughness lengths z0 in arid and semi-arid regions: Prigent, C., I. Tegen, F. Aires, B. Marticorena, and M. Zribi (2005), Estimation of the aerodynamic

Aires, Filipe

209

An empirical expression to relate aerodynamic and surface temperatures for use within1 single-source energy balance models2  

E-Print Network [OSTI]

1 n.1 An empirical expression to relate aerodynamic and surface temperatures for use within1 single that the14 reference temperature for the estimation of convective fluxes, the aerodynamic temperature, is15 between the aerodynamic22 and the air temperatures and the difference between the surface and the air

Paris-Sud XI, Université de

210

STAGGEREDMESH COMPUTATION FOR AERODYNAMIC G.S. Djambazov \\Lambda , C.H. Lai y & K.A. Pericleous z  

E-Print Network [OSTI]

STAGGERED­MESH COMPUTATION FOR AERODYNAMIC SOUND G.S. Djambazov \\Lambda , C.­H. Lai y & K the applicability of a combined technique for aerodynamic sound simulation based on the staggered acoustic routines in magnitude and scale of the quantities involved. Aerodynamic sound is generated as a result

Lai, Choi-Hong

211

Marques, Flvio Donizeti (1997) Multi-layer functional approximation of non-linear unsteady aerodynamic response. PhD thesis.  

E-Print Network [OSTI]

aerodynamic response. PhD thesis. http://theses.gla.ac.uk/2091/ Copyright and moral rights for this thesis-LAYER FUNCTIONAL APPROXIMATION OF NON-LINEAR UNSTEADY AERODYNAMIC RESPONSE by Flavio Donizeti Marques Thesis 1997 CopYright 1997 Flavio Donizet i Marques, #12;Abstract Non-linear unsteady aerodynamic effects

Glasgow, University of

212

IV  

Broader source: Energy.gov (indexed) [DOE]

of 99 of 99 Fiscal Year (FY) 2010 Energy Efficient Building Systems Regional Innovation Cluster Initiative A joint FOA published by: The Department of Energy The Department of Commerce-Economic Development Administration The Department of Commerce-National Institute of Standards and Technology The Small Business Administration The Department of Labor The Department of Education

213

IV  

Broader source: Energy.gov (indexed) [DOE]

Supplement to the Draft Solar PEIS iii October 2011 CONTENTS 1 2 3 NOTATION ........................................................................................................................ ix 4 5 ENGLISH/METRIC AND METRIC/ENGLISH EQUIVALENTS .................................. xiii 6 7 1 INTRODUCTION ..................................................................................................... 1-1 8

214

Cavitation as a complementary tool for automotive aerodynamics J.F. Beaudoin, O. Cadot, J.L. Aider, K. Gosse, P. Paranthoen, B. Hamelin,  

E-Print Network [OSTI]

Cavitation as a complementary tool for automotive aerodynamics J.F. Beaudoin, O. Cadot, J.L. Aider consists in reducing the aerodynamic drag of the vehicles. As a matter of fact, aerodynamic forces play and Sovran 1993; Hucho 1998). Since the pioneering work of Morel (1978) and Ahmed (1983) about aerodynamics

Wesfreid, José Eduardo

215

Finding the Force -- Consistent Particle Seeding for Satellite Aerodynamics  

E-Print Network [OSTI]

When calculating satellite trajectories in low-earth orbit, engineers need to adequately estimate aerodynamic forces. But to this day, obtaining the drag acting on the complicated shapes of modern spacecraft suffers from many sources of error. While part of the problem is the uncertain density in the upper atmosphere, this works focuses on improving the modeling of interacting rarified gases and satellite surfaces. The only numerical approach that currently captures effects in this flow regime---like self-shadowing and multiple molecular reflections---is known as test-particle Monte Carlo. This method executes a ray-tracing algorithm to follow particles that pass through a control volume containing the spacecraft and accumulates the momentum transfer to the body surfaces. Statistical fluctuations inherent in the approach demand particle numbers in the order of millions, often making this scheme too costly to be practical. This work presents a parallel test-particle Monte Carlo method that takes advantage of b...

Parham, J Brent

2013-01-01T23:59:59.000Z

216

Vacuum chamber with a supersonic-flow aerodynamic window  

DOE Patents [OSTI]

A supersonic flow aerodynamic window is disclosed whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.

Hanson, C.L.

1980-10-14T23:59:59.000Z

217

Vacuum chamber with a supersonic flow aerodynamic window  

DOE Patents [OSTI]

A supersonic flow aerodynamic window, whereby a steam ejector situated in a primary chamber at vacuum exhausts superheated steam toward an orifice to a region of higher pressure, creating a barrier to the gas in the region of higher pressure which attempts to enter through the orifice. In a mixing chamber outside and in fluid communication with the primary chamber, superheated steam and gas are combined into a mixture which then enters the primary chamber through the orifice. At the point of impact of the ejector/superheated steam and the incoming gas/superheated steam mixture, a barrier is created to the gas attempting to enter the ejector chamber. This barrier, coupled with suitable vacuum pumping means and cooling means, serves to keep the steam ejector and primary chamber at a negative pressure, even though the primary chamber has an orifice to a region of higher pressure.

Hanson, Clark L. (Livermore, CA)

1982-01-01T23:59:59.000Z

218

Force control system design for aerodynamic load simulator  

Science Journals Connector (OSTI)

A dynamic load simulator which can reproduce on-ground the aerodynamic hinge moment of control surface is an essential rig for the performance and stability test of an aircraft actuation system. The hinge moment varies widely over the flight envelope depending on the specific flight condition and maneuvering status. To replicate the wide spectrum of this hinge moment variation within some accuracy bounds, a force controller is designed based on the quantitative feedback theory (QFT). A dynamic model of load actuation system is derived, and verified through the experiment. The efficacy of QFT force controller is verified by a numerical simulation, in which combined aircraft dynamics, flight control law and hydraulic actuation system dynamics of aircraft control surface are considered.

Yoonsu Nam; Sung Kyung Hong

2002-01-01T23:59:59.000Z

219

Joint computational and experimental aerodynamics research on a reentry vehicle  

SciTech Connect (OSTI)

This paper seeks to improve the synergism between computational aerodynamics and wind tunnel experimentation. In this paper, experimental and computational results are presented for a hypersonic vehicle configuration at Mach 8. Comparisons are made between experimental and computational results in order to improve the accuracy of both approaches. The basic vehicle configuration is a spherically blunted cone with a slice parallel with the axis of the vehicle. The half-angle of the cone is 10 deg. and the ratio of spherical nose radius to base radius in 10%. Onto the slice portion of the vehicle can be attached flaps with three different deflection angles; 10, 20, and 30 deg. All of the experimental results were obtained in the Sandia Mach 8 long duration, blow-down, hypersonic wind tunnel. Flow visualization results include surface oil flow, spark schlieren, and liquid crystal photographs and video. The liquid crystals were used as an aid in verifying that a laminar boundary layer existed over the entire body. An extensive uncertainty analysis was conducted to estimate quantitatively the accuracy of the measurement. Computational aerodynamic force and moment predictions are compared with the wind tunnel data. The Sandia Parabolized Navier-Stokes code is used to generate solutions for the sliced vehicle (no flap) and partial solutions for the flapped vehicle. For the geometry with the flap, an axially separated flow occurs and a time iterative Navier-Stokes code is used to provide comparisons with the data. This paper presents a portion of the results given in earlier works and also discusses new experimental results with this configuration.

Not Available

1991-01-01T23:59:59.000Z

220

Aerodynamic effects in ink-jet printing on a moving web  

E-Print Network [OSTI]

Hsiao, W.-K., Hoath, S.D., Martin, G.D. and Hutchings, I.M., paper for NIP28 2012, 'Aerodynamic effects in ink-jet printing on a moving web' (accepted) Aerodynamic Effects in Ink-Jet Printing on a Moving Web Wen-Kai Hsiao, Stephen D Hoath... airflow and the wakes from the printed ink drops should be investigated as the primary source of aerodynamically-related print quality issues. Introduction The scope of commercial ink-jet printing has extended significant- ly in recent years. For new...

Hsiao, W.-K.; Hoath, S.D.; Martin, G.D.; Hutchings, I.M.

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Aerodynamic performance and characteristic of vortex structures for Darrieus wind turbine. II. The relationship between vortex structure and aerodynamic performance  

Science Journals Connector (OSTI)

In this paper transient computational fluid dynamics (CFD) simulations of a straight-bladed Darrieus type vertical axis wind turbine were performed by means of an in-house CFD code. The Spalart-Allmaras turbulence model was implemented in the numerical code for the turbulence. Particular emphasis was placed on effect of interaction between vortices and blades on the aerodynamic performance of the simulated turbine at different tip speed and solidity ratios. The obtained results suggested that vortices were shed from previous blade passages and the close encounter of a rotor blade with these vortices can have a considerable impact on power coefficient of the simulated turbine during operation at different tip speed ratios. As a result possible reasons for the changes in the behavior of this type of turbine due to the variation of tip speed ratio and solidity were proposed.

2014-01-01T23:59:59.000Z

222

Aerodynamic Losses and Heat Transfer in a Blade Cascade with 3-D Endwall Contouring  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Aerodynamic Losses and Heat Transfer in a Aerodynamic Losses and Heat Transfer in a Aerodynamic Losses and Heat Transfer in a Aerodynamic Losses and Heat Transfer in a Blade Cascade with 3 Blade Cascade with 3 - - D D Endwall Endwall Contouring Contouring Principal Investigator Principal Investigator Sumanta Acharya, Professor Sumanta Acharya, Professor Louisiana State University, Baton Rouge, Louisiana Louisiana State University, Baton Rouge, Louisiana Collaborators Collaborators Gazi Mahmood, Ph.D., Research Asqociate Gazi Mahmood, Ph.D., Research Asqociate Arun Saha, Ph.D., Research Associate Arun Saha, Ph.D., Research Associate Ross Gustafson, M.S. student Ross Gustafson, M.S. student SCIES Project 02 SCIES Project 02 - - 01 01 - - SR098 SR098 DOE COOPERATIVE AGREEMENT DE DOE COOPERATIVE AGREEMENT DE - - FC26 FC26 - - 02NT41431 02NT41431 Tom J. George, Program Manager, DOE/NETL

223

Influence of low-speed aerodynamic performance on airport community noise  

E-Print Network [OSTI]

Properly assessing proposed aviation policies requires a thorough trade study of noise, emissions, fuel consumption, and cost. Aircraft low-speed aerodynamic performance is an important driver of all these impacts, and ...

March, Andrew I. (Andrew Irving)

2008-01-01T23:59:59.000Z

224

Unsteady Aerodynamic and Dynamic Analysis of the Meridian UAS in a Rolling-Yawing Motion  

E-Print Network [OSTI]

The nonlinear and unsteady aerodynamic effects of operating the Meridian unmanned aerial system (UAS) in crosswinds and at high angular rates is investigated in this work. The Meridian UAS is a large autonomous aircraft, with a V-tail configuration...

Lykins, Ryan

2014-05-31T23:59:59.000Z

225

An acoustic and aerodynamic study of stops in tonal and non-tonal dialects of Korean  

E-Print Network [OSTI]

ABSTRACT This study investigates the acoustic and aerodynamic properties of well&ndashknown three&ndashway distinction of Korean voiceless stops in two dialects, which differ in their tonal systems: non&ndashtonal Seoul Korean (standard Korean...

Lee, Hyunjung

2010-03-29T23:59:59.000Z

226

E-Print Network 3.0 - aerodynamic shape design Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic shape design Page: << < 1 2 3 4 5 > >> 1 For more information or to apply, contact...

227

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows  

E-Print Network [OSTI]

Aerodynamics of Two Interfering Simple-Shape Bodies in Hypersonic Rarefied-Gas Flows Vladimir V. Riabov Rivier College, Nashua, New Hampshire, USA ABSTRACT Hypersonic rarefied-gas flows near two side of Hypersonic Rarefied Gas Flows n

Riabov, Vladimir V.

228

E-Print Network 3.0 - aerodynamic heating computations Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Control Seminar Series The Dynamics, Systems, and Control Seminar covers a broad range of topics of interest to the Summary: will be served. May 6th, 2010 Edgar Cuji "Aerodynamic...

229

SECTION IV: ATOMIC AND MOLECULAR SCIENCE  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Projectile ionization in collisions of U 28+ with gases ... IV-1 R. E. Olson, R. L. Watson, V. Horvat, K. E....

230

How to improve open rotor aerodynamics at cruise and take-off  

E-Print Network [OSTI]

1 Copyright © 2014 University of Cambridge DRAFT – HOW TO IMPROVE OPEN ROTOR AERODYNAMICS AT CRUISE AND TAKE-OFF Cesare Hall, Alexios Zachariadis, Tobias Brandvik, Nishad Sohoni cah1003@cam.ac.uk University of Cambridge, Whittle... Laboratory 1 JJ Thomson Avenue, Cambridge CB3 0DY ABSTRACT A key challenge in open rotor design is getting the optimum aerodynamics at both the cruise and take-off conditions. This is particularly difficult because the operation and the requirements...

Hall, Cesare; Zachariadis, Alexios; Brandvik, Tobias; Sohoni, Nishad

231

Effect of aerodynamic uncertainties on unconventional lateral control at high angle of attack  

E-Print Network [OSTI]

EFFECT OF AERODYNAMIC UNCERTAINTIES ON UNCONVENTIONAL LATERAL CONTROL AT HIGH ANGLE OF ATTACK A Thesis by BOB GENSEN ELLER Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE December 1987 Major Subject: Aerospace Engineering EFFECT OF AERODYNAMIC UNCERTAINTIES ON UNCONVENTIONAL LATEHAI CONTROL AT HIGH ANGI. E (&F A'I'TACK A Thesis by BOB GENSEN ELLER Approved as to style and content by: Donald T...

Eller, Bob Gensen

1987-01-01T23:59:59.000Z

232

An aerodynamic surface to deploy and position a stall deterrent spoiler  

E-Print Network [OSTI]

AN AERODYNAMIC SURFACE TO DEPLOY AND POSITION A STALL DETERRENT SPOILER A Thesis JEFFREY REED BROWN Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1974 Major Subject: Aerospace Engineering AN AERODYNAMIC SURFACE TO DEPLOY AND POSITION A STALL DETERRENT SPOILER A Thesis by JEFFREY REED BROWN Approved as to style and content by: Chairman of Committee Head o Departm nt Member Member...

Brown, Jeffrey Reed

1974-01-01T23:59:59.000Z

233

Large Eddy Simulation of wind farm aerodynamics: A review  

Science Journals Connector (OSTI)

Abstract To study wind farm aerodynamics (WFA), the Wind Power industry currently relies on simple Engineering Models (EM) that simulate wind farms using basic principles of physics and empirically established approximations. \\{EMs\\} are fast and accurate for an overview of WFA and gauging mean power production, but cannot resolve phenomena like wake meandering, effect of atmospheric stratification on wake development, a turbine?s response to partial wake interaction and yawed inflows etc., and their relation with turbine loading, which require a first principle physics-based model, namely Computational Fluid Dynamics (CFD). Although advances in computer technology have promoted the application of CFD, the study of WFA is yet unworkable with Direct Numerical Simulation, which is the most comprehensive CFD technique. Thus, as a trade-off between cost and detail, researchers must resort to Large Eddy Simulation (LES) to garner thorough knowledge of WFA, which could in succession help the industry improve engineering models. This paper summarises the contributions of various LES investigations into WFA and how they have helped broaden our understanding of the subject. Additionally, the article touches upon the optimal use of LES and of the resultant data, and also the challenges faced by LES.

D. Mehta; A.H. van Zuijlen; B. Koren; J.G. Holierhoek; H. Bijl

2014-01-01T23:59:59.000Z

234

Tandem Differential Mobility Analyzer/Aerodynamic Particle Sizer (APS) Handbook  

SciTech Connect (OSTI)

The tandem differential mobility analyzer (TDMA) is a single instrument that cycles through a series of complementary measurements of the physical properties of size-resolved submicron particles. In 2008, the TDMA was augmented through the addition of an aerodynamic particle sizer (APS), which extends the upper limit of the measured size distribution into the supermicron range. These two instruments are operated in parallel, but because they are controlled by a common computer and because the size distributions measured by the two are integrated in the produced datastreams, they are described together here. Throughout the day, the TDMA sequentially measures submicron aerosol size distributions and size-resolved hygroscopic growth distributions. More specifically, the instrument is operated as a scanning DMA to measure size distributions and as a TDMA to measure size-resolved hygroscopicity. A typical measurement sequence requires roughly 45 minutes. Each morning additional measurements are made of the relative humidity (RH) dependent hygroscopicity and temperature-dependent volatility of size-resolved particles. When the outside temperature and RH are within acceptable ranges, the hydration state of size-resolved particles is also characterized. The measured aerosol distributions complement the array of aerosol instruments in the Aerosol Observing System (AOS) and provide additional details of the light-scattering and cloud-nucleating characteristics of the aerosol.

Collins, D

2010-06-18T23:59:59.000Z

235

Surprising Coordination Geometry Differences in Ce(IV)- and Pu(IV)-Maltol Complexes  

SciTech Connect (OSTI)

As part of a study to characterize the detailed coordination behavior of Pu(IV), single crystal X-ray diffraction structures have been determined for Pu(IV) and Ce(IV) complexes with the naturally-occurring ligand maltol (3-hydroxy-2-methyl-pyran-4-one) and its derivative bromomaltol (5-bromo-3-hydroxy-2-methyl-pyran-4-one). Although Ce(IV) is generally accepted as a structural analog for Pu(IV), and the maltol complexes of these two metals are isostructural, the corresponding bromomaltol complexes are strikingly different with respect to ligand orientation about the metal ion: All complexes exhibit trigonal dodecahedral coordination geometry but the Ce(IV)-bromomaltol complex displays an uncommon ligand arrangement not mirrored in the Pu(IV) complex, although the two metal species are generally accepted to be structural analogs.

Lawrence Berkeley National Laboratory; Raymond, Kenneth; Szigethy, Geza; Xu, Jide; Gorden, Anne E.V.; Teat, Simon J.; Shuh, David K.; Raymond, Kenneth N.

2008-02-12T23:59:59.000Z

236

Safeguards Licensing Aspects of a Future Generation IV Demonstration Facility.  

E-Print Network [OSTI]

?? Generation IV (Gen IV) is a developing new generation of nuclear power reactors which is foreseen to bring about a safer and more sustainable… (more)

Åberg Lindell, Matilda

2010-01-01T23:59:59.000Z

237

Developing the DSM-IV-DSM-IV Criteria to Identify Adolescent Problem Gambling in Non-Clinical Populations  

Science Journals Connector (OSTI)

This paper presents a revised version of DSM-IV-J criteria for youth, the DSM-IV-MR-J, together with psychometric data...gold standard measure.

Sue Fisher

2000-09-01T23:59:59.000Z

238

Generation IV International Forum | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Forum Forum Generation IV International Forum January 14, 2005 - 9:50am Addthis Remarks of Secretary of Energy Spencer Abraham National Press Club It is a pleasure to be here today, to welcome the representatives of the Generation IV International Forum to their first Washington, D.C., meeting. Very early in my tenure as U.S. Secretary of Energy, I took part in the formation of the Generation IV initiative, and the signing of the organization's charter - which provided the framework for international cooperative research on advanced nuclear energy systems that are safe, reliable, economical and proliferation resistant... to help ensure that nuclear power has a vital and viable role in the world's energy future. I last met with the Generation IV International Forum two years ago in

239

The MAX IV storage ring project  

Science Journals Connector (OSTI)

The design of the MAX IV 3 GeV ultralow-emittance storage ring is presented and the implementation of solutions to the technological challenges imposed by the compact multi-bend achromat lattice are described.

Tavares, P.F.

2014-08-27T23:59:59.000Z

240

SECTION IV: ATOMIC, MOLECULAR AND MATERIALS SCIENCE  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ATOMIC, MOLECULAR AND MATERIALS SCIENCE A semiempirical scaling law for target K x-ray production in heavy ion collisions... IV-1 R. L. Watson, Y. Peng, V. Horvat, and A....

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

APIC'95, El Paso, Extended Abstracts, A Supplement to the international journal of Reliable Computing 1 Aerodynamic Aids to Vehicle Stability  

E-Print Network [OSTI]

Computing 1 Aerodynamic Aids to Vehicle Stability R. Bell Abstract--- Modern race cars utilize vari­ ous aerodynamic devices to increase stability, and traction. There is a considerable body of information available

Kreinovich, Vladik

242

Developing Supersonic Impactor and Aerodynamic Lens for Separation and Handling of Nano-Sized Particles  

SciTech Connect (OSTI)

A computational model for supersonic flows of compressible gases in an aerodynamic lens with several lenses and in a supersonic/hypersonic impactor was developed. Airflow conditions in the aerodynamic lens were analyzed and contour plots for variation of Mach number, velocity magnitude and pressure field in the lens were evaluated. The nano and micro-particle trajectories in the lens and their focusing and transmission efficiencies were evaluated. The computational model was then applied to design of a aerodynamic lens that could generate focus particle beams while operating under atmospheric conditions. The computational model was also applied to airflow condition in the supersonic/hypersonic impactor. Variations of airflow condition and particle trajectories in the impactor were evaluated. The simulation results could provide understanding of the performance of the supersonic and hypersonic impactors that would be helpful for the design of such systems.

Goodarz Ahmadi

2008-06-30T23:59:59.000Z

243

The Formation of Systems with Tightly-packed Inner Planets (STIPs) via Aerodynamic Drift  

E-Print Network [OSTI]

The NASA Kepler mission has revealed an abundant class of Systems with Tightly-packed Inner Planets (STIPs). The current paradigm for planet formation suggests that small planetesimals will quickly spiral into the host star due to aerodynamic drag, preventing rocky planet formation. In contrast, we find that aerodynamic drift, when acting on an ensemble of solids, can concentrate mass at short orbital periods in gaseous disks. Sublimation fronts may further aid this process. Kepler data suggest that the innermost known planets are found near the silicate sublimation zone. STIP planets should have a wide range of volatile fractions due to aerodynamic drift and H2 dissociation-driven gas accretion. We further propose that the low mass of Mars is evidence that the Solar System was once a proto-STIP.

Boley, Aaron C

2013-01-01T23:59:59.000Z

244

AIAA Applied Aerodynamics Conference, 10th, Palo Alto, CA, June 22-24, 1992, Technical Papers. Pts. 1 AND 2  

SciTech Connect (OSTI)

Consideration is given to vortex physics and aerodynamics; supersonic/hypersonic aerodynamics; STOL/VSTOL/rotors; missile and reentry vehicle aerodynamics; CFD as applied to aircraft; unsteady aerodynamics; supersonic/hypersonic aerodynamics; low-speed/high-lift aerodynamics; airfoil/wing aerodynamics; measurement techniques; CFD-solvers/unstructured grid; airfoil/drag prediction; high angle-of-attack aerodynamics; and CFD grid methods. Particular attention is given to transonic-numerical investigation into high-angle-of-attack leading-edge vortex flow, prediction of rotor unsteady airloads using vortex filament theory, rapid synthesis for evaluating the missile maneuverability parameters, transonic calculations of wing/bodies with deflected control surfaces; the static and dynamic flow field development about a porous suction surface wing; the aircraft spoiler effects under wind shear; multipoint inverse design of an infinite cascade of airfoils, turbulence modeling for impinging jet flows; numerical investigation of tail buffet on the F-18 aircraft; the surface grid generation in a parameter space; and the flip flop nozzle extended to supersonic flows.

Not Available

1992-01-01T23:59:59.000Z

245

On the aerodynamic redistribution of chondrite components in protoplanetary disks  

E-Print Network [OSTI]

Despite being all roughly of solar composition, primitive meteorites (chondrites) present a diversity in their chemical, isotopic and petrographic properties, and in particular a first-order dichotomy between carbonaceous and non-carbonaceous chondrites. We investigate here analytically the dynamics of their components (chondrules, refractory inclusions, metal/sulfide and matrix grains) in protoplanetary disks prior to their incorporation in chondrite parent bodies. We find the dynamics of the solids, subject to gas drag, to be essentially controlled by the "gas-solid decoupling parameter" $S\\equiv \\textrm{St}/\\alpha$, the ratio of the dimensionless stopping time to the turbulence parameter. The decoupling of the solid particles relative to the gas is significant when $S$ exceeds unity. $S$ is expected to increase with time and heliocentric distance. On the basis of (i) abundance of refractory inclusions (ii) proportion of matrix (iii) lithophile element abundances and (iv) oxygen isotopic composition of chon...

Jacquet, Emmanuel; Fromang, Sébastien

2012-01-01T23:59:59.000Z

246

Missile aerodynamics; Proceedings of the Conference, Monterey, CA, Oct. 31-Nov. 2, 1988  

SciTech Connect (OSTI)

The present conference discusses the development status of predictive capabilities for missile aerodynamic characteristics, the application of experimental techniques to missile-release problems, prospective high-performance missile designs, the use of lateral jet controls for missile guidance, and the integration of stores on modern tactical aircraft. Also discussed are semiempirical aerodynamic methods for preliminary design, high angle-of-attack behavior for an advanced missile, and the dynamic derivatives of missiles and fighter-type configurations at high angles-of-attack.

Mendenhall, M.R.; Nixon, D.; Dillenius, M.F.E.

1989-01-01T23:59:59.000Z

247

Journal of Wind Engineering and Industrial Aerodynamics, 36 (1990) 1-15 1 ElsevierSciencePublishersB.V.,Amsterdam--Printed in The Netherlands  

E-Print Network [OSTI]

Journal of Wind Engineering and Industrial Aerodynamics, 36 (1990) 1-15 1 Elsevier the following topics: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Theme Lectures BluffBody Aerodynamics of Notre Dame, Notre Dame, Indiana 46556-0767; formerly, Professor and Director, Structural Aerodynamics

Kareem, Ahsan

248

To cite this document: Bechet, S. and Negulescu, C. and Chapin, Vincent and Simon, Frank Integration of CFD tools in aerodynamic design of contra-rotating  

E-Print Network [OSTI]

Integration of CFD tools in aerodynamic design of contra-rotating propellers blades. (2011) In: 3rd CEAS concerns. After a Integration of CFD Tools in Aerodynamic Design of Contra-Rotating Propeller Blades S. Béchet and C. A. Negulescu Airbus Operations S.A.S. - Aerodynamics Department, Toulouse, France V. Chapin

Mailhes, Corinne

249

Estimation of unsteady aerodynamics in the wake of a freely flying European starling  

E-Print Network [OSTI]

Wing flapping is one of the most widespread propulsion methods found in nature; however, the current understanding of the aerodynamics in bird wakes is incomplete. The role of the unsteady motion in the flow and its contribution to the aerodynamics is still an open question. In the current study, the wake of a freely flying European starling has been investigated using long-duration high-speed Particle Image Velocimetry (PIV) in the near wake. Kinematic analysis of the wings and body of the bird has been performed using additional high-speed cameras that recorded the bird movement simultaneously with the PIV measurements. The wake evolution of four complete wingbeats has been characterized through reconstruction of the time resolved data, and the aerodynamics in the wake have been analyzed in terms of the streamwise forces acting on the bird. The profile drag from classical aerodynamics was found to be positive during most of the wingbeat cycle, yet kinematic images show that the bird does not decelerate. It ...

Ben-Gida, Hadar; Taylor, Zachary J; Bezner-Kerr, Wayne; Guglielmo, Christopher G; Kopp, Gregory A; Gurka, Roi

2013-01-01T23:59:59.000Z

250

Benchmark of aerodynamic cycling helmets using a refined wind tunnel test protocol for helmet drag research  

E-Print Network [OSTI]

The study of aerodynamics is very important in the world of cycling. Wind tunnel research is conducted on most of the equipment that is used by a rider and is a critical factor in the advancement of the sport. However, to ...

Sidelko, Stephanie

2007-01-01T23:59:59.000Z

251

Fan Aerodynamic Performance Guarantees: Do Your Policies, Procedures and Penalties Provide Adequate Certainty?  

E-Print Network [OSTI]

With few exceptions, fan vendors do not provide a written guarantee regarding aerodynamic performance. Some fan vendors even go so far as to state in their terms and conditions of sale that fan performance is not guaranteed unless it is specifically...

Kaufman, S. G.; Martin, V.; Falk, M. A.

2004-01-01T23:59:59.000Z

252

On the Aerodynamic Performance of a Class of Vertical Shaft Windmills  

Science Journals Connector (OSTI)

...1976 research-article On the Aerodynamic Performance of a Class of Vertical Shaft Windmills P. N. Shankar A theory is presented...speed ratios corresponding to the peak power coefficient and greater. Finally, when compared with the available experimental data...

1976-01-01T23:59:59.000Z

253

Uncovering changes in spider orb-web topology owing to aerodynamic effects  

Science Journals Connector (OSTI)

...30 44 Uncovering changes in spider orb-web topology owing to aerodynamic effects Ramon...to retain prey with minimum damage to its web and at the lowest manufacturing cost. This...studies reveal that the performance of the web upon impact may not be based on the mechanical...

2014-01-01T23:59:59.000Z

254

A New Aerodynamic Traction Principle for Handling Products on an Air Cushion  

E-Print Network [OSTI]

1 A New Aerodynamic Traction Principle for Handling Products on an Air Cushion Guillaume J. Laurent. The product is carried on a thin air cushion and transported along the system by induced air flows principle for handling delicate and clean products, such as silicon wafers, glass sheets or flat foodstuff

Paris-Sud XI, Université de

255

AIAA 2002-3298 AERODYNAMICS OF TWO SIDE-BY-SIDE PLATES IN HYPERSONIC  

E-Print Network [OSTI]

AIAA 2002-3298 AERODYNAMICS OF TWO SIDE-BY-SIDE PLATES IN HYPERSONIC RAREFIED-GAS FLOWS Vladimir V. Riabov* Rivier College, Nashua, New Hampshire 03060 Abstract Hypersonic rarefied-gas flows near two side have provided valuable information related to physics of hypersonic flows about spacecraft elements

Riabov, Vladimir V.

256

On the quasi-steady aerodynamics of normal hovering flight part I: the induced power factor  

Science Journals Connector (OSTI)

...Pennycuik, CJ . 2008 Modelling the flying bird. Oxford, UK: Elsevier...A Hedenstrom. 2011 Actuator disk model and span efficiency of...wingbeat kinematics in slow-flying pied flycatchers. J. R. Soc...reduce aerodynamic efficiency in flying beetles. J. R. Soc. Interface...

2014-01-01T23:59:59.000Z

257

Pomeroy IV Wind Farm | Open Energy Information  

Open Energy Info (EERE)

IV Wind Farm IV Wind Farm Facility Pomeroy IV Wind Farm Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner MidAmerican Energy Developer MidAmerican Energy Energy Purchaser MidAmerican Energy Location Pomeroy IA Coordinates 42.570484°, -94.702506° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.570484,"lon":-94.702506,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

258

Meadow Lake IV | Open Energy Information  

Open Energy Info (EERE)

Meadow Lake IV Meadow Lake IV Facility Meadow Lake IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Horizon Wind Energy Developer EDP Renewables Location Brookston IN Coordinates 40.601111°, -86.864167° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.601111,"lon":-86.864167,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

259

Mountain View IV | Open Energy Information  

Open Energy Info (EERE)

IV IV Facility Mountain View IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner AES Wind Generation Developer AES Wind Generation Energy Purchaser Southern California Edison Co Location White Water CA Coordinates 33.95475187°, -116.7015839° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.95475187,"lon":-116.7015839,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

260

Annex IV Environmental Webinar | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Annex IV Environmental Webinar Annex IV Environmental Webinar Annex IV Environmental Webinar January 23, 2014 12:00PM to 1:30PM EST Online The Energy Department will present a live webcast on Instrumentation for Monitoring Around Marine Renewable Energy Devices, highlighting themes that arose during a related workshop. Webinar presentations will include discussion on monitoring of near-field interactions between marine mammals and marine renewable energy converters, determining the distribution and habitat use of marine animals in the vicinity of marine renewable energy converters, and characterizing sound produced by marine renewable energy converters. 12:00 to 1:30 p.m. Eastern Standard Time 9:00 to 10:30 a.m. Pacific Standard Time Join Lync Meeting Join by phone866-528-1882 or 509-375-4555

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Tetrahydrothiophene complexes of technetium(IV)  

Science Journals Connector (OSTI)

A technetium(IV) complex of the composition trans-[TcCl4(tht)2] (tht = tetrahydrothiophene) is formed during heating of \\{K2TcCl6\\} in a mixture of tht and aqueous HCl. The thioether ligands are only weakly bonded and the red crystals slowly decompose under release of tht. The weak technetium–sulphur bonds are confirmed by Tc–S distances of 2.494(1) Å. The anionic thioether technetium(IV) complex [TcBr5(tht)]? is formed by the reaction of (NBu4)2[TcBr6] with neat tht. The tetrabutylammonium salt of the complex is indefinitely stable in air.

Adelheid Hagenbach; Ulrich Abram

2004-01-01T23:59:59.000Z

262

JOURNAL DE PHYSIQUE CoZZoque C9, suppZ6ment au noll, Tome 41, novembre 1980, page C9-423 EXPERIMENTAL STUDY OF A FREE-VORTEX AERODYNAMIC WINDOW  

E-Print Network [OSTI]

-423 EXPERIMENTAL STUDY OF A FREE-VORTEX AERODYNAMIC WINDOW W. Masuda and M. Yuasa Research Institute, Ishikawajima free-vortex aerodynamic window has been fabricated and tested. Aerodynamic performance studies show of solid materials, an aerodynamic window makes use of a nonabsorbing gas jet to permit the extraction

Paris-Sud XI, Université de

263

Synergies Between Generation-IV and Advanced  

E-Print Network [OSTI]

to these changes · Requires experimental data for validation Limited resources require careful selection both recognize potential risk to environment and public health Safety goals and requirements Waste minimization Regulatory reform #12;9/14/2004 16th TOFE: Gen IV + ARIES 11/17 Safety Common safety goal

264

Numerical simulation of aerodynamic derivatives and critical wind speed for long-span bridges based on simplified steady wind field  

Science Journals Connector (OSTI)

Combining the computational fluid dynamics-based numerical simulation with the forced vibration technique for extraction ... calculating the aerodynamic derivatives and the critical flutter wind speed for long-sp...

Dabo Xin Ph.D. Student ???; Jinping Ou ???

2007-06-01T23:59:59.000Z

265

Scramjet Operability Range Studies of an Integrated Aerodynamic-Ramp-Injector/Plasma-Torch Igniter with Hydrogen and Hydrocarbon Fuels.  

E-Print Network [OSTI]

??An integrated aerodynamic-ramp-injector/plasma-torch-igniter of original design was tested in a Mâ = 2, unvitiated, heated flow facility arranged as a diverging duct scramjet combustor. The… (more)

Bonanos, Aristides Michael

2005-01-01T23:59:59.000Z

266

Under the Saturn IV Rocket | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Rocket October 10, 2013 - 12:05pm Addthis Under the Saturn IV Rocket Photo credit: Kelly Visconti Under the Saturn IV Rocket Photo credit: Kelly Visconti On the Road with...

267

Effects of flow curvature on the aerodynamics of Darrieus wind turbines  

SciTech Connect (OSTI)

A theoretical and experimental investigation was conducted which clearly showed the effects of flow curvature to be significant determinants of Darrieus turbine blade aerodynamics; qualitatively, these results apply equally to straight or curved bladed machines. Unusually large boundary layer radial pressure gradients and virtually altered camber and incidence are the phenomena of primary importance. Conformal mapping techniques were developed which transform the geometric turbine airfoils in curved flow to their virtual equivalents in rectilinear flow, thereby permitting the more accurate selection of airfoil aerodynamic coefficients from published sectional data. It is demonstrated that once the flow idiosyncracies are fully understood, they may be used to advantage to improve the wind energy extraction efficiency of these machines.

Migliore, P. G.; Wolfe, W. P.

1980-07-01T23:59:59.000Z

268

A comparative study of the aerodynamics of several wind turbines using flow visualization  

SciTech Connect (OSTI)

This paper reports flow visualization techniques used to study the flows over the Enertech 21-5, Carter 25, and Enertech 44-50. Despite centrifugal effects superimposed on the aerodynamics, tufting (gross aerodynamic behavior) and oil flow (average boundary layer behavior), tests reveal the nature and many of the details of the flows involved. Results were compared to expected flow patterns based on angles of attack calculated from the PROPPC code. Chord Reynolds numbers ranged between 75,000 (Enertech 21-5) to 1,340,000 (Enertech 44-50). The typical low Reynolds number flow characteristics of these airfoils, including laminar separation bubbles, turbulent reattachment, and complete separation were observed. full or partial reattachment due to tower shadow was observed on each machine. Spanwise flow was observed near the leading edge of the Enertech 21-5. Cyclic radial flow from tower dam effect was also noted.

Eggleston, D.M. (Control Engineering, Univ. of Texas of the Permian Basin, Odessa, TX (US)); Starcher, K. (Alternative Energy Inst., West Texas State Univ., Canyon, TX (US))

1990-11-01T23:59:59.000Z

269

State-space model identification and feedback control of unsteady aerodynamic forces  

E-Print Network [OSTI]

Unsteady aerodynamic models are necessary to accurately simulate forces and develop feedback controllers for wings in agile motion; however, these models are often high dimensional or incompatible with modern control techniques. Recently, reduced-order unsteady aerodynamic models have been developed for a pitching and plunging airfoil by linearizing the discretized Navier-Stokes equation with lift-force output. In this work, we extend these reduced-order models to include multiple inputs (pitch, plunge, and surge) and explicit parameterization by the pitch-axis location, inspired by Theodorsen's model. Next, we investigate the na\\"{\\i}ve application of system identification techniques to input--output data and the resulting pitfalls, such as unstable or inaccurate models. Finally, robust feedback controllers are constructed based on these low-dimensional state-space models for simulations of a rigid flat plate at Reynolds number 100. Various controllers are implemented for models linearized at base angles of ...

Brunton, Steven L; Rowley, Clarence W

2014-01-01T23:59:59.000Z

270

Sand transverse dune aerodynamics: 3D Coherent Flow Structures from a computational study  

E-Print Network [OSTI]

The engineering interest about dune fields is dictated by the their interaction with a number of human infrastructures in arid environments. The aerodynamic behaviour of sand dunes in atmospheric boundary layer belongs to the class of bluff bodies. Because of their simple geometry and their frequent occurrence in desert area, transverse sand dunes are usually adopted in literature as a benchmark to investigate dune aerodynamics by means of both computational or experimental approach, usually in nominally 2D setups. The writers suspect the flow in the wake is characterised by 3D features and affected by wind tunnel setup - e.g. blockage effect, duct side wall boundary layer, incoming velocity profile - when experimental studies are carried out. The present study aims at evaluating the 3D flow features of an idealised transverse dune under different setup conditions by means of computational simulations and to compare the obtained results with experimental measurements.

Bruno, Luca

2015-01-01T23:59:59.000Z

271

Fleet Evaluation and Factory Installation of Aerodynamic Heavy Duty Truck Trailers  

SciTech Connect (OSTI)

The purpose of DE-EE0001552 was to develop and deploy a combination of trailer aerodynamic devices and low rolling resistance tires that reduce fuel consumption of a class 8 heavy duty tractor-trailer combination vehicle by 15%. There were 3 phases of the project: Phase 1 – Perform SAE Typed 2 track tests with multiple device combinations. Phase 2 – Conduct a fleet evaluation with selected device combination. Phase 3 – Develop the devices required to manufacture the aerodynamic trailer. All 3 phases have been completed. There is an abundance of available trailer devices on the market, and fleets and owner operators have awareness of them and are purchasing them. The products developed in conjunction with this project are at least in their second round of refinement. The fleet test undertaken showed an improvement of 5.5 – 7.8% fuel economy with the devices (This does not include tire contribution).

Beck, Jason; Salari, Kambiz; Ortega, Jason; Brown, Andrea

2013-09-30T23:59:59.000Z

272

Tactical missile aerodynamics - Prediction methodology. Progress in Astronautics and Aeronautics. Vol. 142  

SciTech Connect (OSTI)

The present volume discusses tactical missile aerodynamic drag, drag-prediction methods for axisymmetric missile bodies, an aerodynamic heating analysis for supersonic missiles, a component buildup method for engineering analysis of missiles at low-to-high angles of attack, experimental and analytical methods for missiles with noncircular fuselages, and a vortex-cloud model for body vortex shedding and tracking. Also discussed are panel methods with vorticity effects and corrections for nonlinear compressibility, supersonic full-potential methods for missile body analysis, space-marching Euler solvers, the time-asymptotic Euler/Navier-Stokes methods for subsonic and transonic flows, 3D boundary layers on missiles, Navier-Stokes analyses of flows over slender airframes, and the interaction of exhaust plumes with missile airframes.

Mendenhall, M.R. (Nielsen Engineering and Research, Inc., Mountain View, CA (United States))

1992-01-01T23:59:59.000Z

273

Media Transatlantic IV Traffic March 29 31, 2012  

E-Print Network [OSTI]

Conference Media Transatlantic IV ­ Traffic March 29 ­ 31, 2012 University of Paderborn, Germany . d e / r t g - a u t o m a t i s m s Media Transatlantic IV ­ Traffic Graduiertenkolleg Automatismen;Conference Media Transatlantic IV ­ Traffic March 29 ­ 31, 2012 University of Paderborn, Germany Room B 3

Paderborn, Universität

274

The aerodynamic characteristics of an airfoil utilizing boundary layer and circulation control  

E-Print Network [OSTI]

AND DISCUSSION 22 Effects on Lift Effects on Drag 33 Effects on Pitching Moment 36 Accuracy of Data 37 Flow Interference 38 111 Chapte r VI CONCLUSIONS BIB LIO GRAPHY APPENDIX . Page 41 43 44 Table l. Aerodynamic Characteristics for Varying... control. The suction slot was 0. 065 inches wide and 2. 50 inches long in the spanwise direction. In order to measure the pressure distribution on the model, static pressure orifices were installed in the model surface at the spanwise centerline...

Boothe, Edward Milton

2012-06-07T23:59:59.000Z

275

Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines  

SciTech Connect (OSTI)

When work began on the Darrieus vertical axis wind turbine (VAWT) program at Sandia National Laboratories, it was recognized that there was a paucity of symmetrical airfoil data needed to describe the aerodynamics of turbine blades. Curved-bladed Darrieus turbines operate at local Reynolds numbers (Re) and angles of attack (..cap alpha..) seldom encountered in aeronautical applications. This report describes (1) a wind tunnel test series conducted at moderate values of Re in which 0 less than or equal to ..cap alpha.. less than or equal to 180/sup 0/ force and moment data were obtained for four symmetrical blade-candidate airfoil sections (NACA-0009, -0012, -0012H, and -0015), and (2) how an airfoil property synthesizer code can be used to extend the measured properties to arbitrary values of Re (10/sup 4/ less than or equal to Re less than or equal to 10/sup 7/) and to certain other section profiles (NACA-0018, -0021, -0025).

Sheldahl, R E; Klimas, P C

1981-03-01T23:59:59.000Z

276

New Materials for NGNP/Gen IV  

SciTech Connect (OSTI)

The bounding conditions were briefly summarized for the Next Generation Nuclear Plant (NGNP) that is the leading candidate in the Department of Energy Generation IV reactor program. Metallic materials essential to the successful development and proof of concept for the NGNP were identified. The literature bearing on the materials technology for high-temperature gas-cooled reactors was reviewed with emphasis on the needs identified for the NGNP. Several materials were identified for a more thorough study of their databases and behavioral features relative to the requirements ASME Boiler and Pressure Vessel Code, Section III, Division 1, Subsection NH.

Robert W. Swindeman; Douglas L. Marriott

2009-12-18T23:59:59.000Z

277

Gen IV Materials Handbook Functionalities and Operation  

SciTech Connect (OSTI)

This document is prepared for navigation and operation of the Gen IV Materials Handbook, with architecture description and new user access initiation instructions. Development rationale and history of the Handbook is summarized. The major development aspects, architecture, and design principles of the Handbook are briefly introduced to provide an overview of its past evolution and future prospects. Detailed instructions are given with examples for navigating the constructed Handbook components and using the main functionalities. Procedures are provided in a step-by-step fashion for Data Upload Managers to upload reports and data files, as well as for new users to initiate Handbook access.

Ren, Weiju [ORNL

2009-12-01T23:59:59.000Z

278

ARIES-IV Nested Shell Blanket Design  

SciTech Connect (OSTI)

The ARIES-IV Nested Shell Blanket (NSB) Design is an alternate blanket concept of the ARIES-IV low activation helium-cooled reactor design. The reference design has the coolant routed in the poloidal direction and the inlet and outlet plena are located at the top and bottom of the torus. The NSB design has the high velocity coolant routed in the toroidal direction and the plena are located behind the blanket. This is of significance since the selected structural material is SiC-composite. The NSB is designed to have key high performance components with characteristic dimensions of no larger than 2 m. These components can be brazed to form the blanket module. For the diverter design, we eliminated the use of W as the divertor coating material by relying on the successful development of the gaseous divertor concept. The neutronics and thermal-hydraulic performance of both blanket concepts are similar. The selected blanket and divertor configurations can also meet all the projected structural, neutronics and thermal-hydraulics design limits and requirements. With the selected blanket and divertor materials, the design has a level of safety assurance rate of I (LSA-1), which indicates an inherently safe design.

Wong, C.P.C.; Redler, K.; Reis, E.E.; Will, R. [General Atomics, San Diego, CA (United States); Cheng, E. [TSI Research, Inc. (United States); Hasan, C.M.; Sharafat, S. [California Univ., Los Angeles, CA (United States)

1993-11-01T23:59:59.000Z

279

Variation in the aerodynamic drag coefficient due to changes in the shape of an automobile  

E-Print Network [OSTI]

VARIATION IN THE AERODXMMIC DRAG COEEEICIENT DUE TO CHANGES LN THE SHAPE OF AN AUTOMOBILE A Thesis by JOHN GILBERT MILLI%MS Su'bmitned to the Graduate College of the Texas A&M University in partial fulfillment of the requirements fo... Air Density C HAFTER I IliiTRODUCTION During the early years of the automobile, little or no effort was made to explore the problem of aerodynamic drag. This situation was the result oi' two factors. First, the passenger cars of shat time were...

Williams, John Gilbert

1968-01-01T23:59:59.000Z

280

Numerical computation of aerodynamic sensitivity coefficients in the transonic and supersonic regimes  

E-Print Network [OSTI]

). Differentiating Eqs. (9) and (10) with respect to x and substituting the results into Eq. (8) yields For parabolic-arc sections Fu 1 - 2C(L-x)/LL ? w + 2T(1-2x) For NACA four-digit sections (11) Fu 1 - 2C(L-x)/LL + 5T(0. 14845/Jx-0. 126-0. 7032x+0. 8529x... by Leland A. Garison (Chair of Committee) Cyrus Ostowari (Member) Steven D. Talia erro (Member) W. E. Haisler (Head of Department) May 1988 ABSTRACT Numerical Computation of Aerodynamic Sensitivity Coefficients in the Transonic and Supersonic...

Elbanna, Hesham Mahmoud

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Aerodynamic Thrust Modelling in Wave Tank Tests of Offshore Floating Wind Turbines Using a Ducted Fan  

Science Journals Connector (OSTI)

Wave tank testing of scaled models is standard practice during the development of floating wind turbine platforms for the validation of the dynamics of conceptual designs. Reliable recreation of the dynamics of a full scale floating wind turbine by a scaled model in a basin requires the precise scaling of the masses and inertias and also the relevant forces and its frequencies acting on the system. The scaling of floating wind turbines based on the Froude number is customary for basin experiments. This method preserves the hydrodynamic similitude, but the resulting Reynolds number is much lower than in full scale. The aerodynamic loads on the rotor are therefore out of scale. Several approaches have been taken to deal with this issue, like using a tuned drag disk or redesigning the scaled rotor. This paper describes the implementation of an alternative method based on the use of a ducted fan located at the model tower top in the place of the rotor. The fan can introduce a variable force that represents the total wind thrust by the rotor. A system controls this force by varying the rpm, and a computer simulation of the full scale rotor provides the desired thrust to be introduced by the fan. This simulation considers the wind turbine control, gusts, turbulent wind, etc. The simulation is performed in synchronicity with the test and it is fed in real time by the displacements and velocities of the platform captured by the acquisition system. Thus, the simulation considers the displacements of the rotor within the wind field and the calculated thrust models the effect of the aerodynamic damping. The system is not able currently to match the effect of gyroscopic momentum. The method has been applied during a test campaign of a semisubmersible platform with full catenary mooring lines for a 6MW wind turbine in scale 1/40 at Ecole Centrale de Nantes. Several tests including pitch free decay under constant wind and combined wave and wind cases have been performed. Data from the experiments are compared with aero-servo-hydro-elastic computations with good agreement showing the validity of the method for the representation of the scaled aerodynamics. The new method for the aerodynamic thrust scaling in basin tests is very promising considering its performance, versatility and lower cost in comparison with other methods.

José Azcona; Faisal Bouchotrouch; Marta González; Joseba Garciandía; Xabier Munduate; Felix Kelberlau; Tor A Nygaard

2014-01-01T23:59:59.000Z

282

Tactical missile aerodynamics - General topics. Progress in Astronautics and Aeronautics. Vol. 141  

SciTech Connect (OSTI)

The present volume discusses the development history of tactical missile airframes, aerodynamic considerations for autopilot design, a systematic method for tactical missile design, the character and reduction of missile observability by radar, the visualization of high angle-of-attack flow phenomena, and the behavior of low aspect ratio wings at high angles of attack. Also discussed are airbreathing missile inlets, 'waverider' missile configurations, bodies with noncircular cross-sections and bank-to-turn missiles, asymmetric flow separation and vortex shedding on bodies-of-revolution, unsteady missile flows, swept shock-wave/boundary-layer interactions, pylon carriage and separation of stores, and internal stores carriage and separation.

Hemsch, M.J. (Lockheed Engineering and Sciences Co., Hampton, VA (United States))

1992-01-01T23:59:59.000Z

283

Roadmap Integration Team Presentation Generation IV Roadmap Overview  

Broader source: Energy.gov (indexed) [DOE]

Presentation Presentation Generation IV Roadmap Overview NERAC Meeting: Washington, D.C. April 15, 2002 Roadmap Integration Team Presentation Definition - Generation IV Generation IV is: "...the next generation of nuclear energy systems that can be licensed, constructed, and operated in a manner that will provide a competitively priced and reliable supply of energy to the country where such systems are deployed, while addressing nuclear safety, waste, proliferation and public perception concerns." Roadmap Integration Team Presentation Objective - Gen IV Technology Roadmap The Technology Roadmap: * Describes systems deployable by 2030 or earlier * Determines which systems offer significant advances towards:

284

Generation IV International Forum Signs Agreement to Collaborate...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Japan Increase Cooperation on Sodium-Cooled Fast Reactor Prototypes China and Russia to Join the Generation IV International Forum Renewed energy and enhanced coordination...

285

Coupling a Mesoscale Numerical Weather Prediction Model with Large-Eddy Simulation for Realistic Wind Plant Aerodynamics Simulations (Poster)  

SciTech Connect (OSTI)

Wind plant aerodynamics are influenced by a combination of microscale and mesoscale phenomena. Incorporating mesoscale atmospheric forcing (e.g., diurnal cycles and frontal passages) into wind plant simulations can lead to a more accurate representation of microscale flows, aerodynamics, and wind turbine/plant performance. Our goal is to couple a numerical weather prediction model that can represent mesoscale flow [specifically the Weather Research and Forecasting model] with a microscale LES model (OpenFOAM) that can predict microscale turbulence and wake losses.

Draxl, C.; Churchfield, M.; Mirocha, J.; Lee, S.; Lundquist, J.; Michalakes, J.; Moriarty, P.; Purkayastha, A.; Sprague, M.; Vanderwende, B.

2014-06-01T23:59:59.000Z

286

IV1. Yoon and E. Crosbie  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

19 19 IV1. Yoon and E. Crosbie May 1988 The APS Beam Transfer Line from Linac to Booster Synchrotron In this note, we describe the recently designed APS beam transport system to the booster synchrotron. Another transfer system which guides the beam from the booster to the storage ring is described in ref. 1, and therefore it not be treated here. The system of interest consists of two parts; the transfer line LTOA from the injector linac to the positron accumulator ring (PAR) and the transfer line ATOB from the accumulator ring to booster synchrotron. For the design, we assumed that the rms transverse emittance of the Jinac output beam is about 1.1 mm mrad at 450 MeV andthe energy spread is :11%. The plan view of the designed beam transfer line is shown in Fig. 1. In this figure, B1 bends the

287

Advanced Aerodynamic Devices to Improve the Performance, Economics, Handling, and Safety of Heavy Vehicles  

SciTech Connect (OSTI)

Research is being conducted at the Georgia Tech Research Institute (GTRI) to develop advanced aerodynamic devices to improve the performance, economics, stability, handling and safety of operation of Heavy Vehicles by using previously-developed and flight-tested pneumatic (blown) aircraft technology. Recent wind-tunnel investigations of a generic Heavy Vehicle model with blowing slots on both the leading and trailing edges of the trailer have been conducted under contract to the DOE Office of Heavy Vehicle Technologies. These experimental results show overall aerodynamic drag reductions on the Pneumatic Heavy Vehicle of 50% using only 1 psig blowing pressure in the plenums, and over 80% drag reductions if additional blowing air were available. Additionally, an increase in drag force for braking was confirmed by blowing different slots. Lift coefficient was increased for rolling resistance reduction by blowing only the top slot, while downforce was produced for traction increase by blowing only the bottom. Also, side force and yawing moment were generated on either side of the vehicle, and directional stability was restored by blowing the appropriate side slot. These experimental results and the predicted full-scale payoffs are presented in this paper, as is a discussion of additional applications to conventional commercial autos, buses, motor homes, and Sport Utility Vehicles.

Robert J. Englar

2001-05-14T23:59:59.000Z

288

Computerized method and system for designing an aerodynamic focusing lens stack  

DOE Patents [OSTI]

A computerized method and system for designing an aerodynamic focusing lens stack, using input from a designer related to, for example, particle size range to be considered, characteristics of the gas to be flowed through the system, the upstream temperature and pressure at the top of a first focusing lens, the flow rate through the aerodynamic focusing lens stack equivalent at atmosphere pressure; and a Stokes number range. Based on the design parameters, the method and system determines the total number of focusing lenses and their respective orifice diameters required to focus the particle size range to be considered, by first calculating for the orifice diameter of the first focusing lens in the Stokes formula, and then using that value to determine, in iterative fashion, intermediate flow values which are themselves used to determine the orifice diameters of each succeeding focusing lens in the stack design, with the results being output to a designer. In addition, the Reynolds numbers associated with each focusing lens as well as exit nozzle size may also be determined to enhance the stack design.

Gard, Eric (San Francisco, CA); Riot, Vincent (Oakland, CA); Coffee, Keith (Diablo Grande, CA); Woods, Bruce (Livermore, CA); Tobias, Herbert (Kensington, CA); Birch, Jim (Albany, CA); Weisgraber, Todd (Brentwood, CA)

2011-11-22T23:59:59.000Z

289

Aerodynamic efficiency of smoke ventilators in light streets and shed-type roofs  

Science Journals Connector (OSTI)

Low-rise industrial buildings in continental Europe have usually no or very little window area in the sidewalls. To provide the necessary daylight, translucent surfaces are fitted in the roof. Well known examples are shed roofs or curved and shed-type light streets in flat roofs. For economic reasons smoke ventilators are then integrated into the light surfaces. This paper gives typical examples of smoke ventilators installed in shed roofs and in curved or shed-type light streets. The measurement of the aerodynamic free areas on full scale apparatus is not possible due to the large dimensions of the relevant roof surfaces. Therefore, tests have to be conducted in model scale. The relevant similarity considerations for such model tests are discussed and the applicability of model scale tests is demonstrated. Finally, the most important parameters influencing the aerodynamic efficiency of typical ventilator installations in shed-roofs and curved or shed-type light streets are described for the cases without and with side wind.

H.J. Gerhardt; C. Kramer

1993-01-01T23:59:59.000Z

290

This is a preprint of the following article, which is available from http://mdolab.engin.umich.edu Zhoujie Lyu and J. R. R. A. Martins. Aerodynamic Shape Optimization Investigations of the Common  

E-Print Network [OSTI]

://mdolab.engin.umich.edu Zhoujie Lyu and J. R. R. A. Martins. Aerodynamic Shape Optimization Investigations of the Common Research this preprint. Aerodynamic Shape Optimization Investigations of the Common Research Model Wing Benchmark Zhoujie, University of Michigan, Ann Arbor, MI Abstract Despite considerable research on aerodynamic shape

Papalambros, Panos

291

Modeling piston secondary motion and skirt lubrication with applications  

E-Print Network [OSTI]

The interest in reducing emission and improving engine efficiency has become a major push in industry, due to upcoming stricter regulations. A great deal of attention has been given to the frictional losses due to piston ...

Totaro, Pasquale (Pasquale Pio)

2014-01-01T23:59:59.000Z

292

CALIBRATING C-IV-BASED BLACK HOLE MASS ESTIMATORS  

SciTech Connect (OSTI)

We present the single-epoch black hole mass estimators based on the C IV {lambda}1549 broad emission line, using the updated sample of the reverberation-mapped active galactic nuclei and high-quality UV spectra. By performing multi-component spectral fitting analysis, we measure the C IV line widths (FWHM{sub C{sub IV}} and line dispersion, {sigma}{sub C{sub IV}}) and the continuum luminosity at 1350 A (L{sub 1350}) to calibrate the C-IV-based mass estimators. By comparing with the H{beta} reverberation-based masses, we provide new mass estimators with the best-fit relationships, i.e., M{sub BH}{proportional_to}L{sub 1350}{sup 0.50{+-}0.07}{sigma}{sub C{sub IV}{sup 2}} and M{sub BH}{proportional_to}L{sub 1350}{sup 0.52{+-}0.09} FWHM{sub C{sub IV}{sup 0.56{+-}0.48}}. The new C-IV-based mass estimators show significant mass-dependent systematic difference compared to the estimators commonly used in the literature. Using the published Sloan Digital Sky Survey QSO catalog, we show that the black hole mass of high-redshift QSOs decreases on average by {approx}0.25 dex if our recipe is adopted.

Park, Daeseong; Woo, Jong-Hak; Shin, Jaejin [Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 151-742 (Korea, Republic of); Denney, Kelly D., E-mail: pds2001@astro.snu.ac.kr, E-mail: woo@astro.snu.ac.kr, E-mail: jjshin@astro.snu.ac.kr, E-mail: kelly@dark-cosmology.dk [Dark Cosmology Centre, Niels Bohr Institute, Juliane Maries Vej 30, DK-2100 Copenhagen O (Denmark)

2013-06-20T23:59:59.000Z

293

Salton Sea IV Geothermal Facility | Open Energy Information  

Open Energy Info (EERE)

IV Geothermal Facility IV Geothermal Facility Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Salton Sea IV Geothermal Facility General Information Name Salton Sea IV Geothermal Facility Facility Salton Sea IV Sector Geothermal energy Location Information Address 6922 Crummer Rd. Location Calipatria, California Zip 92233 Coordinates 33.157511158558°, -115.63861370087° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.157511158558,"lon":-115.63861370087,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

294

An Integrated Safety Assessment Methodology for Generation IV Nuclear Systems  

SciTech Connect (OSTI)

The Generation IV International Forum (GIF) Risk and Safety Working Group (RSWG) was created to develop an effective approach for the safety of Generation IV advanced nuclear energy systems. Early work of the RSWG focused on defining a safety philosophy founded on lessons learned from current and prior generations of nuclear technologies, and on identifying technology characteristics that may help achieve Generation IV safety goals. More recent RSWG work has focused on the definition of an integrated safety assessment methodology for evaluating the safety of Generation IV systems. The methodology, tentatively called ISAM, is an integrated “toolkit” consisting of analytical techniques that are available and matched to appropriate stages of Generation IV system concept development. The integrated methodology is intended to yield safety-related insights that help actively drive the evolving design throughout the technology development cycle, potentially resulting in enhanced safety, reduced costs, and shortened development time.

Timothy J. Leahy

2010-06-01T23:59:59.000Z

295

Actinide Corroles: Synthesis and Characterization of Thorium(IV) and Uranium(IV) bis(-chloride) Dimers  

SciTech Connect (OSTI)

The first synthesis and structural characterization of actinide corroles is presented. Thorium(IV) and uranium(IV) macrocycles of Mes2(p-OMePh)corrole were synthesised and characterized by single-crystal X-ray diffraction, UV-Visible spectroscopy, variable-temperature 1H NMR, ESI mass spectrometry and cyclic voltammetry.

Ward, Ashleigh L.; Buckley, Heather L.; Gryko, Daniel T.; Lukens, Wayne W.; Arnold, John

2013-12-01T23:59:59.000Z

296

Extending a MOOS-IvP Autonomy System and Users Guide to the IvPBuild Toolbox  

E-Print Network [OSTI]

This document describes how to extend the suite of MOOS applications and IvP Helm behaviors distributed with the MOOS-IvP software bundle from www.moos-ivp.org. It covers (a) a straw-man repository with a place-holder MOOS ...

Benjamin, Michael R.

2009-08-20T23:59:59.000Z

297

A study on aerodynamics and mechanisms of elementary morphing models for flapping wing in bat forward flight  

E-Print Network [OSTI]

The large active wing deformation is a significant way to generate high aerodynamic forces required in bat flapping flight. Besides the twisting, the elementary morphing models of a bat wing are proposed, such as wing-bending in the spanwise direction, wing-cambering in the chordwise direction, and wing area-changing. A plate of aspect ratio 3 is used to model a bat wing and a three dimensional unsteady panel method is applied to predict the aerodynamic forces. It is found that the cambering model has a great positive influence on the lift, followed by area-changing model and then the bending model. The further study indicates that the vortex control is a main mechanism to produce high aerodynamic forces, and the mechanisms for the aerodynamic force enhancement are the asymmetry of the cambered wing and the amplifier effects of wing area-changing and wing bending. The lift and thrust are mainly generated during the downstroke and almost negligible forces during the upstroke by the integrated morphing model-wi...

Zi-Wu, Guan

2014-01-01T23:59:59.000Z

298

Evaluating the validities of different DSM-IV-based conceptual constructs of tobacco dependence.  

E-Print Network [OSTI]

Interview Schedule for DSM-IV (DIS-IV). St Louis, MO:R. A. Finding order in the DSM-IV nicotine dependence syn-Kilbey M. M. , Andreski P. DSM-III-R nicotine dependence in

Hendricks, Peter S; Prochaska, Judith J; Humfleet, Gary L; Hall, Sharon M

2008-01-01T23:59:59.000Z

299

The U.S. Generation IV Implementation Strategy  

SciTech Connect (OSTI)

This report has been prepared by the U.S. Department of Energy (DOE) to respond to Congressional direction contained in Senate Report 107-220 from the Senate Committee on Appropriations regarding the Energy and Water Development Appropriations for 2003. In that report, the Committee instructed the Department to prepare a report regarding how it intends to carry out the results of the Generation IV Roadmap. This report is the U.S. Department of Energy's response to the Congressional directive. It summarizes results from the Generation IV Technology Roadmap and the strategy for implementing of the Generation IV program in the United States. Planning for the implementation of the Generation IV program is based on (1) the long-term outlook for nuclear energy in the United States, (2) the advice of the Nuclear Energy Research Advisory Committee during the two-year development of the Generation IV Technology Roadmap, and (3) the need for the Generation IV program to be integrated with other nuclear energy research programs of the Department. Considerable emphasis is given to developing the priorities and necessary timelines for the U.S. Generation IV Program, as well as developing international R&D cooperation that will benefit the program and strengthen U.S. leadership in nuclear technology R&D.

None

2003-09-01T23:59:59.000Z

300

Aerodynamic drag reduction apparatus for gap-divided bluff bodies such as tractor-trailers  

DOE Patents [OSTI]

An apparatus for reducing the aerodynamic drag of a bluff-bodied vehicle such as a tractor-trailer in a flowstream, the bluff-bodied vehicle of a type having a leading portion, a trailing portion connected to the leading portion, and a gap between the leading and trailing portions defining a recirculation zone. The apparatus is preferably a baffle assembly, such as a vertical panel, adapted to span a width of the gap between the leading and trailing portions so as to impede cross-flow through the gap, with the span of the baffle assembly automatically adjusting for variations in the gap width when the leading and trailing portions pivot relative to each other.

Ortega, Jason M. (Pacifica, CA); Salari, Kambiz (Livermore, CA)

2006-07-11T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Laboratory evaluation of fan/filter units' aerodynamic and energy performance  

SciTech Connect (OSTI)

The paper discusses the benefits of having a consistent testing method to characterize aerodynamic and energy performance of FFUs. It presents evaluation methods of laboratory-measured performance of ten relatively new, 1220 mm x 610 mm (or 4 ft x 2 ft) fan-filter units (FFUs), and includes results of a set of relevant metrics such as energy performance indices (EPI) based upon the sample FFUs tested. This paper concludes that there are variations in FFUs' performance, and that using a consistent testing and evaluation method can generate compatible and comparable FFU performance information. The paper also suggests that benefits and opportunities exist for our method of testing FFU energy performance to be integrated in future recommended practices.

Xu, Tengfang; Jeng, Ming-Shan

2004-07-27T23:59:59.000Z

302

Investigation of Tractor Base Bleeding for Heavy Vehicle Aerodynamic Drag Reduction  

SciTech Connect (OSTI)

One of the main contributors to the aerodynamic drag of a heavy vehicle is tractor-trailer gap drag, which arises when the vehicle operates within a crosswind. Under this operating condition, freestream flow is entrained into the tractor-trailer gap, imparting a momentum exchange to the vehicle and subsequently increasing the aerodynamic drag. While a number of add-on devices, including side extenders, splitter plates, vortex stabilizers, and gap sealers, have been previously tested to alleviate this source of drag, side extenders remain the primary add-on device of choice for reducing tractor-trailer gap drag. However, side extenders are not without maintenance and operational issues. When a heavy vehicle pivots sharply with respect to the trailer, as can occur during loading or unloading operations, the side extenders can become crushed against the trailer. Consequently, fleet operators are forced to incur additional costs to cover the repair or replacement of the damaged side extenders. This issue can be overcome by either shortening the side extenders or by devising an alternative drag reduction concept that can perform just as effectively as side extenders. To explore such a concept, we investigate tractor base bleeding as a means of reducing gap drag. Wind tunnel measurements are made on a 1:20 scale heavy vehicle model at a vehicle width-based Reynolds number of 420,000. The tractor bleeding flow, which is delivered through a porous material embedded within the tractor base, is introduced into the tractor-trailer gap at bleeding coefficients ranging from 0.0-0.018. To determine the performance of tractor base bleeding under more realistic operating conditions, computational fluid dynamics simulations are performed on a full-scale heavy vehicle within a crosswind for bleeding coefficients ranging from 0.0-0.13.

Ortega, J; Salari, K; Storms, B

2007-10-25T23:59:59.000Z

303

Phase IV - Resource Production and Power Plant Construction | Open Energy  

Open Energy Info (EERE)

Phase IV - Resource Production and Power Plant Construction Phase IV - Resource Production and Power Plant Construction Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home GEA Development Phase IV: Resource Production and Power Plant Construction GEA Development Phases The Geothermal Energy Association's (GEA) Geothermal Reporting Terms and Definitions are a guideline for geothermal developers to use when submitting geothermal resource development information to GEA for public dissemination in its annual US Geothermal Power Production and Development Update. GEA's Geothermal Reporting Terms and Definitions serve to increase the consistency, accuracy, and reliability of industry information presented in the development updates. Phase I - Resource Procurement and Identification Phase II - Resource Exploration and Confirmation

304

Understanding Humic Acid / Zr(IV) Interaction - A Spectromicroscopy Approach  

SciTech Connect (OSTI)

Complexation of Zr(IV) by humic acid (HA) and polyacrylic acid (PAA) is investigated from the point of view of the organic ligand. STXM Spectromicroscopy and C 1s-NEXAFS point to different interaction mechanisms between Zr(IV) cations and oxo/hydroxo colloids and PAA. Under conditions where the metal aquo ion is stable, strong complexes are formed. In contrast, unspecific surface coating is identified when PAA is contacted with Zr(IV) oxo/hydroxide colloids. HA exhibits similar C 1s-NEXAFS features indicating a complexation reaction.

Rothe, Joerg; Plaschke, Markus; Denecke, Melissa A. [Forschungszentrum Karlsruhe, Institut fuer Nukleare Entsorgung, P.O. Box 3640, D-76021 Karlsruhe (Germany)

2007-02-02T23:59:59.000Z

305

SciTech Connect: Solar Energy Education. Reader, Part IV. Sun...  

Office of Scientific and Technical Information (OSTI)

Technical Report: Solar Energy Education. Reader, Part IV. Sun schooling Citation Details In-Document Search Title: Solar Energy Education. Reader, Part IV. Sun schooling A...

306

Generation IV International Forum Updates Technology Roadmap and Builds  

Broader source: Energy.gov (indexed) [DOE]

Generation IV International Forum Updates Technology Roadmap and Generation IV International Forum Updates Technology Roadmap and Builds Future Collaboration Generation IV International Forum Updates Technology Roadmap and Builds Future Collaboration December 31, 2013 - 12:14pm Addthis GIF Policy Group Meeting in Brussels, Belgium, November 2013 GIF Policy Group Meeting in Brussels, Belgium, November 2013 Deputy Assistant Secretary Kelly Deputy Assistant Secretary Kelly Deputy Assistant Secretary for Nuclear Reactor Technologies The Generation IV International Forum (GIF) held its 36th Policy Group (PG) meeting on November 21-22 in Brussels, Belgium. The PG reviewed progress on a number of on-going actions and received progress reports from the GIF Experts Group (EG) and the GIF Senior Industry Advisory Panel (SIAP).

307

Observations on A Technology Roadmap for Generation IV Nuclear Energy  

Broader source: Energy.gov (indexed) [DOE]

Observations on A Technology Roadmap for Generation IV Nuclear Observations on A Technology Roadmap for Generation IV Nuclear Energy Systems: Technical Roadmap Report Observations on A Technology Roadmap for Generation IV Nuclear Energy Systems: Technical Roadmap Report The development of advanced nuclear energy systems in the U.S. will depend greatly on the continued success of currently operating light water nuclear power plants and the ordering of new installations in the short term. DOE needs to give those immediate objectives the highest priority and any additional support they require to assure their success. DOE is pursuing two initiatives to encourage a greater use of nuclear energy systems. The initiatives have been reviewed by NERAC Subcommittee on Generation IV Technology Planning (GRNS) and they are: * A Near Term Development (NTD) Roadmap which is in the process of being

308

Synthesis, Characterization, and Cytotoxicity of Platinum(IV) Carbamate Complexes  

E-Print Network [OSTI]

The synthesis, characterization, and cytotoxicity of eight new platinum(IV) complexes having the general formula cis,cis,trans-[Pt(NH[subscript 3)[subscript 2]Cl[subscript 2](O[subscript 2]CNHR)[subscript 2

Wilson, Justin Jeff

309

DSM-IV and International Communication in Psychiatric Diagnosis  

Science Journals Connector (OSTI)

The Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) will be published in 1994 at...International Classification of Diseases..., 10th revision (ICD-10). This timing was chosen to facili...

Allen Frances; Harold Pincus; Thomas Widiger; Michael First…

1994-01-01T23:59:59.000Z

310

COMPARING PERSONALITY DISORDER MODELS: FFM AND DSM-IV-TR.  

E-Print Network [OSTI]

??The current edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR; American Psychiatric Association, 2000) defines personality disorders as categorical entities that are… (more)

Samuel, Douglas B.

2008-01-01T23:59:59.000Z

311

Significant Roles Paid by Mit Solar House IV  

Science Journals Connector (OSTI)

Experiences at the solar energy project of Massachusetts Institute of Technology with MIT Solar House IV during the two years period ... by this project for the later period of solar energy research are described...

Ken-ichi Kimura

2009-01-01T23:59:59.000Z

312

Victory Gardens I and IV | Open Energy Information  

Open Energy Info (EERE)

Victory Gardens I and IV Victory Gardens I and IV Jump to: navigation, search Name Victory Gardens I and IV Facility Victory Gardens I and IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Developer Zond Systems Energy Purchaser Southern California Edison Co Location Tehachapi CA Coordinates 35.07665°, -118.25529° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.07665,"lon":-118.25529,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

313

24th AIAA Applied Aerodynamics Conference, Jun. 5-8, 2006, San Francisco, CA Flight Control of a UAV with Inflatable Wings with  

E-Print Network [OSTI]

24th AIAA Applied Aerodynamics Conference, Jun. 5-8, 2006, San Francisco, CA Flight Control are conceptually possible in almost any size and have been developed with spans as small as 6 inches for missiles

Jacob, Jamey

314

Effects of tone on the three-way laryngeal distinction in Korean: An acoustic and aerodynamic comparison of the Seoul and South Kyungsang dialects  

E-Print Network [OSTI]

KU ScholarWorks | http://kuscholarworks.ku.edu Effects of tone on the three-way laryngeal distinction in Korean: An acoustic and aerodynamic comparison of the Seoul and South Kyungsang dialects by Hyunjung Lee and Allard Jongman KU Scholar... below. Lee, H., and Jongman, A. (2012). Effects of tone on the three-way laryngeal distinction in Korean: An acoustic and aerodynamic comparison of the Seoul and South Kyungsang dialects. Journal of the International Phonetic Association 42, 145...

Lee, Hyunjung; Jongman, Allard

2012-08-01T23:59:59.000Z

315

Reduction of aerodynamic forces on a minivan by a pair of vortex generators of a pocket type  

Science Journals Connector (OSTI)

Reduction of the aerodynamic forces on a minivan has been achieved using a pair of pockets at the left and the right sides, respectively, of the rear roof end of the vehicle. The two pockets generate cross-streamwise vortices that cause the turbulent kinetic energy to increase in the boundary layer in the downstream of the two pockets. This increased turbulent kinetic energy induces the flow separation to be delayed further downstream along the vehicle back. Unlike the common Vortex Generators (VGs) of extrusive type, these VGs of a pocket type do not cause any additional drag by themselves. This paper investigates numerically the effects of pockets on the reduction of the aerodynamic forces and the flow field around a minivan.

Inchul Kim; Hualei Chen

2010-01-01T23:59:59.000Z

316

Advanced Electric Systems and Aerodynamics for Efficiency Improvements in Heavy Duty Trucks  

SciTech Connect (OSTI)

The Advanced Electric Systems and Aerodynamics for Efficiency Improvements in Heavy Duty Trucks program (DE-FC26-04NT42189), commonly referred to as the AES program, focused on areas that will primarily benefit fuel economy and improve heat rejection while driving over the road. The AES program objectives were to: (1) Analyze, design, build, and test a cooling system that provided a minimum of 10 percent greater heat rejection in the same frontal area with no increase in parasitic fan load. (2) Realize fuel savings with advanced power management and acceleration assist by utilizing an integrated starter/generator (ISG) and energy storage devices. (3) Quantify the effect of aerodynamic drag due to the frontal shape mandated by the area required for the cooling system. The program effort consisted of modeling and designing components for optimum fuel efficiency, completing fabrication of necessary components, integrating these components into the chassis test bed, completing controls programming, and performance testing the system both on a chassis dynamometer and on the road. Emission control measures for heavy-duty engines have resulted in increased engine heat loads, thus introducing added parasitic engine cooling loads. Truck electrification, in the form of thermal management, offers technological solutions to mitigate or even neutralize the effects of this trend. Thermal control offers opportunities to avoid increases in cooling system frontal area and forestall reduced fuel economy brought about by additional aerodynamic vehicle drag. This project explored such thermal concepts by installing a 2007 engine that is compliant with current regulations and bears additional heat rejection associated with meeting these regulations. This newer engine replaced the 2002 engine from a previous project that generated less heat rejection. Advanced power management, utilizing a continuously optimized and controlled power flow between electric components, can offer additional fuel economy benefits to the heavy-duty trucking industry. Control software for power management brings added value to the power distribution and energy storage architecture on board a truck with electric accessories and an ISG. The research team has built upon a previous truck electrification project, formally, 'Parasitic Energy Loss Reduction and Enabling Technologies for Class 7/8 Trucks', DE-FC04-2000AL6701, where the fundamental concept of electrically-driven accessories replacing belt/gear-driven accessories was demonstrated on a Kenworth T2000 truck chassis. The electrical accessories, shown in Figure 1, were controlled to provide 'flow on demand' variable-speed operation and reduced parasitic engine loads for increased fuel economy. These accessories also provided solutions for main engine idle reduction in long haul trucks. The components and systems of the current project have been integrated into the same Kenworth T2000 truck platform. Reducing parasitic engine loading by decoupling accessory loads from the engine and driving them electrically has been a central concept of this project. Belt or gear-driven engine accessories, such as water pump, air conditioning compressor, or air compressor, are necessarily tied to the engine speed dictated by the current vehicle operating conditions. These conventional accessory pumps are sized to provide adequate flow or pressure at low idle or peak torque speeds, resulting in excess flow or pressure at cruising or rated speeds. The excess flow is diverted through a pressure-minimizing device such as a relief valve thereby expending energy to drive unnecessary and inefficient pump operation. This inefficiency causes an increased parasitic load to the engine, which leads to a loss of usable output power and decreased fuel economy. Controlling variable-speed electric motors to provide only the required flow or pressure of a particular accessory system can yield significant increases in fuel economy for a commercial vehicle. Motor loads at relatively high power levels (1-5 kW, or higher) can be efficiently provided

Larry Slone; Jeffrey Birkel

2007-10-31T23:59:59.000Z

317

Effect of lift force on the aerodynamics of dust grains in the protoplanetary disk  

E-Print Network [OSTI]

We newly introduce lift force into the aerodynamics of dust grains in the protoplanetary disk. Although many authors have so far investigated the effects of the drag force, gravitational force and electric force on the dust grains, the lift force has never been considered as a force exerted on the dust grains in the gas disk. If the grains are spinning and moving in the fluid, then the lift force is exerted on them. We show in this paper that the dust grains can be continuously spinning due to the frequent collisions so that the lift force continues to be exerted on them, which is valid in a certain parameter space where the grain size is larger than ~ 1 m and where the distance from the central star is larger than 1 AU for the minimum mass solar nebula. In addition, we estimate the effects of the force on the grain motion and obtain the result that the mean relative velocity between the grains due to the lift force is comparable to the gas velocity in the Kepler rotational frame when the Stokes number and li...

Yamaguchi, Masaki S

2014-01-01T23:59:59.000Z

318

Rather than resonance, flapping wing flyers may play on aerodynamics to improve performance  

E-Print Network [OSTI]

Saving energy and enhancing performance are secular preoccupations shared by both nature and human beings. In animal locomotion, flapping flyers or swimmers rely on the flexibility of their wings or body to passively increase their efficiency using an appropriate cycle of storing and releasing elastic energy. Despite the convergence of many observations pointing out this feature, the underlying mechanisms explaining how the elastic nature of the wings is related to propulsive efficiency remain unclear. Here we use an experiment with a self-propelled simplified insect model allowing to show how wing compliance governs the performance of flapping flyers. Reducing the description of the flapping wing to a forced oscillator model, we pinpoint different nonlinear effects that can account for the observed behavior ---in particular a set of cubic nonlinearities coming from the clamped-free beam equation used to model the wing and a quadratic damping term representing the fluid drag associated to the fast flapping motion. In contrast to what has been repeatedly suggested in the literature, we show that flapping flyers optimize their performance not by especially looking for resonance to achieve larger flapping amplitudes with less effort, but by tuning the temporal evolution of the wing shape (i.e. the phase dynamics in the oscillator model) to optimize the aerodynamics.

Sophie Ramananarivo; Ramiro Godoy-Diana; Benjamin Thiria

2011-08-29T23:59:59.000Z

319

Preliminary Measurements From A New Flat Plate Facility For Aerodynamic Research  

SciTech Connect (OSTI)

This paper details the design and preliminary measurements used in the characterisation of a new flat plate research facility. The facility is designed specifically to aid in the understanding of entropy generation throughout the boundary layer with special attention given to non-equilibrium flows. Hot-wire measurements were obtained downstream of two turbulence generating grids. The turbulence intensity, integral and dissipation length scale ranges measured are 1.6%-7%, 5mm-17mm and 0.7mm-7mm, respectively. These values compared well to existing correlations. The flow downstream of both grids was found to be homogenous and isotropic. Flow visualisation is employed to determine aerodynamic parameters such as flow 2-dimensionality and the effect of the flap angle on preventing separation at the leading edge. The flow was found to be 2-dimensional over all measurement planes. The non-dimensional pressure distribution of a modern turbine blade suction surface is simulated on the flat plate through the use of a variable upper wall. The Reynolds number range based on wetted plate length and inlet velocity is 70,000-4,000,000.

D. M. McEligot; D. W. Nigg; E. J. Walsh; D. Hernon; M.R.D. Davies

2005-03-01T23:59:59.000Z

320

A coupled mesoscale–microscale framework for wind resource estimation and farm aerodynamics  

Science Journals Connector (OSTI)

Abstract This study discusses the development of a coupled mesoscale–microscale framework for wind resource estimation and farm aerodynamics. WINDWYO is a computational framework for performing coupled mesoscale–microscale simulations. The framework is modular, automated and supports coupling of different mesoscale and microscale solvers using overset or matched grids. The modular nature of the framework and the support for overset grids allows the independent development of mesoscale and microscale solvers and the efficient coupling between the codes. The performance of the framework is evaluated by coupling Weather Research and Forecasting (WRF) model with three microscale computational fluid dynamics (CFD) codes of varying complexity. The solvers used are: (i) UWake: a blade element model with free-vortex wake, (ii) Flowyo: large eddy simulation code with actuator line/disk parametrization of the wind turbine and (iii) HELIOS: detached eddy simulation code with full rotor modeling and adaptive mesh refinement. Power predictions and wake visualization of single turbine and off-shore Lillgrund wind farm in uniform and turbulent inflow are used to demonstrate the capabilities of the framework.

Harish Gopalan; Christopher Gundling; Kevin Brown; Beatrice Roget; Jayanarayanan Sitaraman; Jefferey D. Mirocha; Wayne O. Miller

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Inflow Characterization and Aerodynamics Measurements on a SWT-2.3-101 Wind Turbine: Preprint  

SciTech Connect (OSTI)

Post processing techniques for aerodynamic data acquired from a Siemens SWT-2.3-101 turbine have been developed and applied in this paper. The turbine is installed at the National Wind Technology Center (NWTC) as part of Cooperative Research And Development Agreement between Siemens Wind Power and the National Renewable Energy Laboratory (NREL) under U.S. Department of Energy (DOE) sponsorship. The results indicate that the use of these corrections is essential for accurate analysis of the data. An example of local inflow angles, velocities, and inflow velocity over the rotor plane derived from measurements from a 5-hole probe is also presented. Finally the pressure measurements are used to characterize unsteady phenomenon, namely, rotational augmentation and dynamic stall on an inboard station. The results show that the rotational augmentation can considerably increase the attached flow regime compared to the 2D CFD results. The dynamic stall event was seen to significantly delay the stall. Furthermore, the nondimensionalized vortex convection derived from the dynamic stall event was found to agree well with results from others studies.

Medina, P.; Singh, M.; Johansen, J.; Jove, A.; Fingersh, L.; Schreck, S.

2012-01-01T23:59:59.000Z

322

Offshore floating vertical axis wind turbines, dynamics modelling state of the art. part I: Aerodynamics  

Science Journals Connector (OSTI)

Abstract The need to further exploit offshore wind resources has pushed offshore wind farms into deeper waters, requiring the use of floating support structures to be economically sustainable. The use of conventional wind turbines may not continue to be the optimal design for floating applications. Therefore it is important to assess other alternative concepts in this context. Vertical axis wind turbines (VAWTs) are one promising concept, and it is important to first understand the coupled and relatively complex dynamics of floating \\{VAWTs\\} to assess their technical feasibility. A comprehensive review detailing the areas of engineering expertise utilised in developing an understanding of the coupled dynamics of floating \\{VAWTs\\} has been developed through a series of articles. This first article details the aerodynamic modelling of VAWTs, providing a review of available models, discussing their applicability to floating \\{VAWTs\\} and current implementations by researchers in this field. A concise comparison between conventional horizontal axis wind turbines and \\{VAWTs\\} is also presented, outlining the advantages and disadvantages of these technologies for the floating wind industry. This article has been written both for researchers new to this research area, outlining underlying theory whilst providing a comprehensive review of the latest work, and for experts in this area, providing a comprehensive list of the relevant references where the details of modelling approaches may be found.

Michael Borg; Andrew Shires; Maurizio Collu

2014-01-01T23:59:59.000Z

323

Foote Creek Rim IV Wind Farm | Open Energy Information  

Open Energy Info (EERE)

IV Wind Farm IV Wind Farm Facility Foote Creek Rim IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Caithness Developer SeaWest Energy Purchaser Bonneville Power Admin Location Carbon County WY Coordinates 41.626456°, -106.202095° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.626456,"lon":-106.202095,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

324

Microsoft Word - Wilton IV DEIS_ 03 12 13.docx  

Broader source: Energy.gov (indexed) [DOE]

Wilton IV Wind Energy Center Wilton IV Wind Energy Center Draft Environmental Impact Statement DOE/EIS-0469 March 2013 COVER SHEET Lead Federal Agency: U.S. Department of Energy, Western Area Power Administration Title: Draft Environmental Impact Statement for the Wilton IV Wind Energy Center For additional information on this Draft Environmental Impact Statement contact: Mr. Matt Marsh Upper Great Plains Regional Office Western Area Power Administration P.O. Box 35800, Billings, MT 59107-5800 MMarsh@wapa.gov, (800) 358-3415 For general information on the U.S. Department of Energy's National Environmental Policy Act process please contact: Ms. Carol M. Borgstrom, Director Office of NEPA Policy and Compliance (GC-54) U.S. Department of Energy Washington, D.C. 20585 (202) 586-4600

325

Gen IV public comments-G Vine.PDF  

Broader source: Energy.gov (indexed) [DOE]

Generation IV Goals and Roadmap Generation IV Goals and Roadmap Public meeting, Thursday, Nov. 16, 2000 JW Marriott, Washington DC Gary Vine, EPRI I'd like to cite two regulatory landmarks established during the U.S. DOE/Industry ALWR Program, 1983-98, the intent of which should be incorporated into the goal setting for all future reactors. These are followed by four specific comments on the Generation IV goals. A. ALWR goals are Industry goals, and must be kept distinct from regulatory requirements. The ALWR Program was very careful to maintain and preserve clear separation between regulatory requirements and industry goals, as expressed in the EPRI ALWR Utility Requirements Document. The industry needed to decide how to comply with regulations in the most cost-effective way, and needed to strategically design-in the extra margins needed for investment protection, operational

326

Automatic generation and analysis of solar cell IV curves  

SciTech Connect (OSTI)

A photovoltaic system includes multiple strings of solar panels and a device presenting a DC load to the strings of solar panels. Output currents of the strings of solar panels may be sensed and provided to a computer that generates current-voltage (IV) curves of the strings of solar panels. Output voltages of the string of solar panels may be sensed at the string or at the device presenting the DC load. The DC load may be varied. Output currents of the strings of solar panels responsive to the variation of the DC load are sensed to generate IV curves of the strings of solar panels. IV curves may be compared and analyzed to evaluate performance of and detect problems with a string of solar panels.

Kraft, Steven M.; Jones, Jason C.

2014-06-03T23:59:59.000Z

327

Computational analysis of plasmepsin IV bound to an allophenylnorstatine inhibitor  

Science Journals Connector (OSTI)

The plasmepsin proteases from the malaria parasite Plasmodium falciparum are attracting attention as putative drug targets. A recently published crystal structure of Plasmodium malariae plasmepsin IV bound to an allophenylnorstatine inhibitor [Clemente, J.C. et al. (2006) Acta Crystallogr. D 62, 246–252] provides the first structural insights regarding interactions of this family of inhibitors with plasmepsins. The compounds in this class are potent inhibitors of HIV-1 protease, but also show nM binding affinities towards plasmepsin IV. Here, we utilize automated docking, molecular dynamics and binding free energy calculations with the linear interaction energy LIE method to investigate the binding of allophenylnorstatine inhibitors to plasmepsin IV from two different species. The calculations yield excellent agreement with experimental binding data and provide new information regarding protonation states of active site residues as well as conformational properties of the inhibitor complexes.

Hugo Gutiérrez-de-Terán; Martin Nervall; Ben M. Dunn; Jose C. Clemente; Johan Åqvist

2006-01-01T23:59:59.000Z

328

Tethys and Annex IV Progress Report for FY 2012  

SciTech Connect (OSTI)

The marine and hydrokinetic (MHK) environmental Impacts Knowledge Management System, dubbed “Tethys” after the mythical Greek titaness of the seas, is being developed by the Pacific Northwest National Laboratory (PNNL) to support the U.S. Department of Energy’s Wind and Water Power Program (WWPP). Functioning as a smart database, Tethys enables its users to identify key words or terms to help gather, organize and make available information and data pertaining to the environmental effects of MHK and offshore wind (OSW) energy development. By providing and categorizing relevant publications within a simple and searchable database, Tethys acts as a dissemination channel for information and data which can be utilized by regulators, project developers and researchers to minimize the environmental risks associated with offshore renewable energy developments and attempt to streamline the permitting process. Tethys also houses a separate content-related Annex IV data base with identical functionality to the Tethys knowledge base. Annex IV is a collaborative project among member nations of the International Energy Agency (IEA) Ocean Energy Systems – Implementing Agreement (OES-IA) that examines the environmental effects of ocean energy devices and projects. The U.S. Department of Energy leads the Annex IV working with federal partners such as the Federal Energy Regulatory Commission (FERC), the Bureau of Ocean Energy Management (BOEM), and the National Oceanic Atmospheric Administration (NOAA). While the Annex IV database contains technical reports and journal articles, it is primarily focused on the collection of project site and research study metadata forms (completed by MHK researchers and developers around the world, and collected by PNNL) which provide information on environmental studies and the current progress of the various international MHK developments in the Annex IV member nations. The purpose of this report is to provide a summary of the content, accessibility and functionality enhancements made to the Annex IV and Tethys knowledge bases in FY12.

Hanna, Luke A.; Butner, R. Scott; Whiting, Jonathan M.; Copping, Andrea E.

2013-09-01T23:59:59.000Z

329

The Spectrum of Fluorine, F II, F III, F IV  

Science Journals Connector (OSTI)

The spectrum of fluorine extending from 125A to 620A has been obtained by using a two-meter grazing-incidence spectrograph. A large number of these lines, including nearly all of the stronger ones, have been classified as transitions in the F II, F III and F IV ions. This has made possible the classification of additional lines measured by Dingle in the longer wave-length regions. These analyses yield the following ionization potentials: F II 34.81 volts, F III 62.35 volts, F IV 87.34 volts.

I. S. Bowen

1934-01-15T23:59:59.000Z

330

A nuclear magnetic resonance probe of group IV clathrates  

E-Print Network [OSTI]

A NUCLEAR MAGNETIC RESONANCE PROBE OF GROUP IV CLATHRATES A Dissertation by WEIPING GOU Submitted to the O–ce of Graduate Studies of Texas A&M University in partial fulflllment of the requirements for the degree of DOCTOR OF PHILOSOPHY August 2008... Major Subject: Physics A NUCLEAR MAGNETIC RESONANCE PROBE OF GROUP IV CLATHRATES A Dissertation by WEIPING GOU Submitted to the O–ce of Graduate Studies of Texas A&M University in partial fulflllment of the requirements for the degree of DOCTOR...

Gou, Weiping

2008-10-10T23:59:59.000Z

331

Plutonium Oxidation and Subsequent Reduction by Mn (IV) Minerals  

SciTech Connect (OSTI)

Plutonium sorbed to rock tuff was preferentially associated with manganese oxides. On tuff and synthetic pyrolusite (Mn{sup IV}O{sub 2}), Pu(IV) or Pu(V) was initially oxidized, but over time Pu(IV) became the predominant oxidation state of sorbed Pu. Reduction of Pu(V/VI), even on non-oxidizing surfaces, is proposed to result from a lower Gibbs free energy of the hydrolyzed Pu(IV) surface species versus that of the Pu(V) or Pu(VI) surface species. This work suggests that despite initial oxidation of sorbed Pu by oxidizing surfaces to more soluble forms, the less mobile form of Pu, Pu(IV), will dominate Pu solid phase speciation during long term geologic storage. The safe design of a radioactive waste or spent nuclear fuel geologic repository requires a risk assessment of radionuclides that may potentially be released into the surrounding environment. Geochemical knowledge of the radionuclide and the surrounding environment is required for predicting subsurface fate and transport. Although difficult even in simple systems, this task grows increasingly complicated for constituents, like Pu, that exhibit complex environmental chemistries. The environmental behavior of Pu can be influenced by complexation, precipitation, adsorption, colloid formation, and oxidation/reduction (redox) reactions (1-3). To predict the environmental mobility of Pu, the most important of these factors is Pu oxidation state. This is because Pu(IV) is generally 2 to 3 orders of magnitude less mobile than Pu(V) in most environments (4). Further complicating matters, Pu commonly exists simultaneously in several oxidation states (5, 6). Choppin (7) reported Pu may exist as Pu(IV), Pu(V), or Pu(VI) oxic natural groundwaters. It is generally accepted that plutonium associated with suspended particulate matter is predominantly Pu(IV) (8-10), whereas Pu in the aqueous phase is predominantly Pu(V) (2, 11-13). The influence of the character of Mn-containing minerals expected to be found in subsurface repository environments on Pu oxidation state distributions has been the subject of much recent research. Kenney-Kennicutt and Morse (14), Duff et al. (15), and Morgenstern and Choppin (16) observed oxidation of Pu facilitated by Mn(IV)-bearing minerals. Conversely, Shaughnessy et al. (17) used X-ray Absorption near-edge spectroscopy (XANES) to show reduction of Pu(VI) by hausmannite (Mn{sup II}Mn{sub 2}{sup III}O{sub 4}) and manganite ({gamma}-Mn{sup III}OOH) and Kersting et al., (18) observed reduction of Pu(VI) by pyrolusite (Mn{sup IV}O{sub 2}). In this paper, we attempt to reconcile the apparently conflicting datasets by showing that Mn-bearing minerals can indeed oxidize Pu, however, if the oxidized species remains on the solid phase, the oxidation step competes with the formation of Pu(IV) that becomes the predominant solid phase Pu species with time. The experimental approach we took was to conduct longer term (approximately two years later) oxidation state analyses on the Pu sorbed to Yucca Mountain tuff (initial analysis reported by Duff et al., (15)) and measure the time-dependant changes in the oxidation state distribution of Pu in the presence of the Mn mineral pyrolusite.

KAPLAN, DANIEL

2005-09-13T23:59:59.000Z

332

Mitigating wind-turbine induced avian mortality: Sensory, aerodynamic and cognitive constraints and options  

Science Journals Connector (OSTI)

Abstract Because of the fast rate of wind-energy development it will become a challenge to verify impacts on birdlife and construe ways to minimise these. Birds colliding with wind turbines are generally perceived as one of the major conflict issues for wind-energy development. Development of effective and practical measures to reduce bird mortality related to offshore and onshore wind energy is therefore paramount to avoid any delay in consenting processes. The expected efficacy of post-construction mitigation measures for wind-turbine induced avian mortality can be expected to be species-specific with regard to audible, optical and biomechanical constraints and options. Species-specific sensory faculties limit the ability to observe a wind turbine in a given circumstance. Their consequent cognitive perception may depend on the possibilities for associating wind turbines with risk, and discriminating these from other sources. Last but not least, perceived risks may only be evaded when their aerodynamic, locomotive physiology enables them to do so in due time. In order to be able to identify and construe functional mitigation measures these aspects need to be taken into account. Measures eliciting a series of intermittent strong stimuli that are variable in frequency may limit habituation effects; these should only be elicited specifically to mitigate imminent collision. Thus measures either adjusting turbine operation or warning/deterring birds approaching turbines are expected to be most functional. Warning signals may either be based on optical or audible stimuli; however, birds? hearing is inferior to humans while their visual acuity and temporal resolution is higher, but with great differences among species. Implementing effective mitigation measures could reduce the general level of conflicts with birdlife and thus enable both the development at new sites, at sites that have been declared having too high conflict levels, and utilise the wind resources better at specific sites without increasing the conflict levels.

R. May; O. Reitan; K. Bevanger; S.-H. Lorentsen; T. Nygård

2015-01-01T23:59:59.000Z

333

Inadale (Roscoe IV) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Inadale (Roscoe IV) Wind Farm Inadale (Roscoe IV) Wind Farm Jump to: navigation, search Name Inadale (Roscoe IV) Wind Farm Facility Inadale (Roscoe IV) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner E.On Climate & Renewables Developer E.On Climate & Renewables Location Scurry and Nolan Counties TX Coordinates 32.346675°, -100.379717° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.346675,"lon":-100.379717,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

334

Victory Gardens Phase IV Wind Farm II | Open Energy Information  

Open Energy Info (EERE)

Gardens Phase IV Wind Farm II Gardens Phase IV Wind Farm II Jump to: navigation, search Name Victory Gardens Phase IV Wind Farm II Facility Victory Gardens- Phase IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer Zond Systems Energy Purchaser Southern California Edison Co Location Tehachapi CA Coordinates 35.07665°, -118.25529° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.07665,"lon":-118.25529,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

335

13 - Generation IV reactor designs, operation and fuel cycle  

Science Journals Connector (OSTI)

Abstract: This chapter looks at Generation IV nuclear reactors, such as the very high-temperature reactor (VHTR), the supercritical water reactor (SCWR), the molten salt reactor (MSR), the sodium-cooled fast reactor (SFR), the lead-cooled fast reactor (LFR) and the gas-cooled fast reactor (GFR). Reactor designs and fuel cycles are also described.

N. Cerullo; G. Lomonaco

2012-01-01T23:59:59.000Z

336

GEODESIC FRCHET DISTANCE WITH POLYGONAL OBSTACLES Atlas F. Cook IV  

E-Print Network [OSTI]

GEODESIC FR�CHET DISTANCE WITH POLYGONAL OBSTACLES Atlas F. Cook IV Carola Wenk Abstract We present the first algorithm to compute the geodesic Fréchet distance between two polygonal curves in a plane of from a point source). This shortest path map supports geodesic distance queries from any point s ab

Texas at San Antonio, University of

337

IV.1. UNITARY GROUPS AND BASE CHANGE Michael Harris  

E-Print Network [OSTI]

IV.1. UNITARY GROUPS AND BASE CHANGE Michael Harris 1. Classification of unitary groups over number-split and we set (G) = 1. Typeset by AMS-TEX 1 #12;2 MICHAEL HARRIS Returning to the real case, we set (U(p, q

Harris, Michael - Institut de Mathématiques de Jussieu, Université Paris 7

338

I.V. Stasyuk, O.V. Velychko CONFIGURATIONAL MODEL  

E-Print Network [OSTI]

Complex formation reactions of metal ions and ligand groups are of great importance due to pollution of environment by heavy metal (including actinides) species. In general this type of reaction can be described' & $ % I.V. Stasyuk, O.V. Velychko CONFIGURATIONAL MODEL OF METAL ION COMPLEX FORMATION IN WATER

339

Economic Impact Report BInghamton UnIvERsIty  

E-Print Network [OSTI]

Economic Impact Report 2007 #12;BInghamton UnIvERsIty 8:1 return on investment The term "return will be returned to the state economy and $6 to the local economy -- delivering an economic impact of $8.65 billion as an engine of economic growth that improves the financial health of our region and state. EconomIc Impact

Suzuki, Masatsugu

340

Parameter extraction from I-V characteristics of PV devices  

SciTech Connect (OSTI)

Device parameters such as series and shunt resistances, saturation current and diode ideality factor influence the behaviour of the current-voltage (I-V) characteristics of solar cells and photovoltaic modules. It is necessary to determine these parameters since performance parameters are derived from the I-V curve and information provided by the device parameters are useful in analyzing performance losses. This contribution presents device parameters of CuIn(Se,S){sub 2}- and Cu(In,Ga)(Se,S){sub 2}-based solar cells, as well as, CuInSe{sub 2}, mono- and multicrystalline silicon modules determined using a parameter extraction routine that employs Particle Swarm Optimization. The device parameters of the CuIn(Se,S){sub 2}- and Cu(In,Ga)(Se,S){sub 2}-based solar cells show that the contribution of recombination mechanisms exhibited by high saturation current when coupled with the effects of parasitic resistances result in lower maximum power and conversion efficiency. Device parameters of photovoltaic modules extracted from I-V characteristics obtained at higher temperature show increased saturation current. The extracted values also reflect the adverse effect of temperature on parasitic resistances. The parameters extracted from I-V curves offer an understanding of the different mechanisms involved in the operation of the devices. The parameter extraction routine utilized in this study is a useful tool in determining the device parameters which reveal the mechanisms affecting device performance. (author)

Macabebe, Erees Queen B. [Department of Electronics, Computer and Communications Engineering, Ateneo de Manila University, Loyola Heights, Quezon City 1108 (Philippines); Department of Physics and Centre for Energy Research, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031 (South Africa); Sheppard, Charles J. [Department of Physics, University of Johannesburg, PO Box 524, Auckland Park 2006 (South Africa); Dyk, E. Ernest van [Department of Physics and Centre for Energy Research, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031 (South Africa)

2011-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

IV. On the Classification of Prequency-ratios  

Science Journals Connector (OSTI)

......the Author of a paper On the Distribution of the Proper Fractions, by D. M. T. Sommerville, D.Sc, Proc. Roy. Soe. Edia. Vol. xxxvi. (1906), pp. 116-129. Miscellanea 179 IV. On the Classification of Prequency-ratiosf. BY D. M. Y......

D. M. Y. SOMMERVILLE

1906-10-01T23:59:59.000Z

342

A VACANCY MODEL IN SOLID HELIUM IV B. CASTAING  

E-Print Network [OSTI]

536 A VACANCY MODEL IN SOLID HELIUM IV B. CASTAING Groupe de Physique des Solides de l here a new approach to the problem of vacancies in solid Helium 4, describing them as small liquid droplets. In this model the vacancy effective mass is very small : 0.1 mHe, where mHe is the atomic mass

Boyer, Edmond

343

Victory Gardens Phase IV Wind Farm I | Open Energy Information  

Open Energy Info (EERE)

Gardens Phase IV Wind Farm I Gardens Phase IV Wind Farm I Jump to: navigation, search Name Victory Gardens Phase IV Wind Farm I Facility Victory Gardens- Phase IV Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer Zond Systems Energy Purchaser Southern California Edison Co Location Tehachapi CA Coordinates 35.07665°, -118.25529° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.07665,"lon":-118.25529,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

344

class ID Last Name First name Dr. Advisor_Family Name 1 Med. IV 200600652 Abi Aad Yasmin Dr. Azar  

E-Print Network [OSTI]

Mostafa Dr. Nihmah-Majdalani 43 Med. IV 200600637 Hseiki Rasha Dr. Noureddine 44 Med. IV 200600642 Ismail. Wakim 70 Med. IV 200600877 Shawwa Khalid Dr. Younis 71 Med. IV 200600332 Shibbani Kamel Dr. Zeinelddineclass ID Last Name First name Dr. Advisor_Family Name 1 Med. IV 200600652 Abi Aad Yasmin Dr. Azar 2

Shihadeh, Alan

345

September 2002 Working Group Meeting on Heavy Vehicle Aerodynamic Drag: Presentations and Summary of Comments and Conclusions  

SciTech Connect (OSTI)

A Working Group Meeting on Heavy Vehicle Aerodynamic Drag was held at NASA Ames Research Center on September 23, 2002. The purpose of the meeting was to present and discuss technical details on the experimental and computational work in progress and future project plans. Representatives from the Department of Energy (DOE)/Office of Energy Efficiency and Renewable Energy/Office of FreedomCAR & Vehicle Technologies, Lawrence Livermore National Laboratory (LLNL), Sandia National Laboratories (SNL), NASA Ames Research Center (NASA), University of Southern California (USC), California Institute of Technology (Caltech), Georgia Tech Research Institute (GTRI), Argonne National Laboratory (ANL), Freightliner, and Portland State University participated in the meeting. This report contains the technical presentations (viewgraphs) delivered at the Meeting, briefly summarizes the comments and conclusions, and outlines the future action items. The meeting began with an introduction by the Project Lead Rose McCallen of LLNL, where she emphasized that the world energy consumption is predicted to relatively soon exceed the available resources (i.e., fossil, hydro, non-breeder fission). This short fall is predicted to begin around the year 2050. Minimizing vehicle aerodynamic drag will significantly reduce our Nation's dependence on foreign oil resources and help with our world-wide fuel shortage. Rose also mentioned that educating the populace and researchers as to our world energy issues is important and that our upcoming United Engineering Foundation (UEF) Conference on ''The Aerodynamics of Heavy Vehicles: Trucks, Busses, and Trains'' was one way our DOE Consortium was doing this. Mentioned were the efforts of Fred Browand from USC in organizing and attracting internationally recognized speakers to the Conference. Rose followed with an overview of the DOE project goals, deliverables, and FY03 activities. The viewgraphs are attached at the end of this report. Sid Diamond of DOE discussed the reorganization of the Office of Energy Efficiency and Renewable Energy and that the Office of Heavy Vehicle Technology is now part of the Office of FreedomCAR & Vehicle Technologies. Sid reviewed the FY03 budget and provided information on some plans for FY04. The soon to be posted DOE request for proposals from industry for projects related to parasitic energy losses was discussed. A minimum of 50% cost share by industry will be required and the proposal must be submitted by industry. Collaborative efforts in aerodynamic drag with members of the DOE consortium are encouraged. Sid also mentioned interest in aerodynamic drag contribution due to wheel wells and underbody flow. Sid also mentioned his continued interest in the application of our computational and experimental expertise to the area of locomotive and railcar aerodynamics for the reduction of drag effects and thus, the reduction of fuel consumption by trains. In summary, the technical presentations at the meeting included a review of experimental results and plans by GTRI, USC, and NASA Ames, the computational results from LLNL and SNL for the integrated tractor-trailer benchmark geometry called the Ground Transportation System (GTS) model, and by LLNL for the tractor-trailer gap and trailer wake flow, and turbulence model development and benchmark simulations being investigated by Caltech. USC is also investigating an acoustic drag reduction device that has been named ''Mozart'', GTRI continues their investigation of a blowing device, and LLNL presented their ideas for 2 new base drag reduction devices. ANL presented their plans for a DOE supported Cooperative Research and Development Agreement (CRADA) with Paccar Truck Company utilizing commercial software tools to simulate the flow and drag for an actual tractor and showed the results of some preliminary griding attempts. The attendees also had the opportunity to tour the 12-ft pressure wind tunnel the machine shop were the Generic Conventional Model (GCM, a.k.a. SLRT) was being readied for the scheduled November experiments. Much of

McCallen, R

2002-09-01T23:59:59.000Z

346

Development of Modeling Techniques for A Generation IV Gas Fast Reactor  

E-Print Network [OSTI]

Worldwide, multiple countries are investing a great deal of time and energy towards developing a new class of technologically advanced nuclear reactors. These new reactors have come to be known as the Generation IV (Gen IV) class of nuclear...

Dercher, Andrew Steven

2012-10-19T23:59:59.000Z

347

E-Print Network 3.0 - azapodandov iv indutsirovannyj Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

LAP: Ionizing Radiation Dosimetry SUBJECT: Category IV (mixed betas and photons... ) - ANSI N13.32-2008 Category IV of ANSI N13.32-2008, Performance Testing of Extremity...

348

Annex IV Environmental Webinar: Effects of Energy Removal on Physical Systems  

Broader source: Energy.gov [DOE]

Please mark your calendars for the next Annex IV Environmental webinar titled: Effects of Energy Removal on Physical Systems. Held under the auspices of the Annex IV initiative to the IEA Ocean...

349

E-Print Network 3.0 - air pollution iv Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

iv Search Powered by Explorit Topic List Advanced Search Sample search results for: air pollution iv Page: << < 1 2 3 4 5 > >> 1 Pacific Institute 654 13th Street, Oakland, CA...

350

Generation-IV Roadmap Report of the Fuel Cycle Crosscut Group | Department  

Broader source: Energy.gov (indexed) [DOE]

Generation-IV Roadmap Report of the Fuel Cycle Crosscut Group Generation-IV Roadmap Report of the Fuel Cycle Crosscut Group Generation-IV Roadmap Report of the Fuel Cycle Crosscut Group The Charter of the Generation IV Roadmap Fuel Cycle Crosscut Group (FCCG) is to (1) examine the fuel cycle implications for alternative nuclear power scenarios in terms of Generation IV goals and (2) identify key fuel cycle issues associated with Generation IV goals. This included examination of "fuel resource inputs and waste outputs for the range of potential Generation IV fuel cycles, consistent with projected energy demand scenarios." This report summarizes the results of the studies. The membership of the FCCG comprised 8 US members and 7 members from Generation IV International Forum (GIF) countries including members from

351

Expanding the Autism Ontology to DSM-IV Criteria Omri Mugzach1  

E-Print Network [OSTI]

Expanding the Autism Ontology to DSM-IV Criteria Omri Mugzach1 , BA; Mor Peleg1 , PhD; Steven C Ontology with DSM-IV vocabulary definitions, risk factors, phenotypic manifestations and their prevalence and the DSM-IV criteria. Background: The mechanism of autism is unknown, and it is critical to organize

Peleg, Mor

352

EKF BASED ESTIMATOR FOR FDI IN THE MODEL IV FCCU Yuanjie Huang, Sourabh Dash  

E-Print Network [OSTI]

EKF BASED ESTIMATOR FOR FDI IN THE MODEL IV FCCU Yuanjie Huang, Sourabh Dash G. V. Reklaitis study, a EKF based estimator for the Model IV FCCU is investigated. This model is multivariable variables. Performance of the estimator's application to the AmocoModel IV FCCU case study in terms of early

Venkatasubramanian, Venkat

353

Estimation of exhaust gas aerodynamic force on the variable geometry turbocharger actuator: 1D flow model approach  

Science Journals Connector (OSTI)

Abstract This paper provides a reliable tool for simulating the effects of exhaust gas flow through the variable turbine geometry section of a variable geometry turbocharger (VGT), on flow control mechanism. The main objective is to estimate the resistive aerodynamic force exerted by the flow upon the variable geometry vanes and the controlling actuator, in order to improve the control of vane angles. To achieve this, a 1D model of the exhaust flow is developed using Navier–Stokes equations. As the flow characteristics depend upon the volute geometry, impeller blade force and the existing viscous friction, the related source terms (losses) are also included in the model. In order to guarantee stability, an implicit numerical solver has been developed for the resolution of the Navier–Stokes problem. The resulting simulation tool has been validated through comparison with experimentally obtained values of turbine inlet pressure and the aerodynamic force as measured at the actuator shaft. The simulator shows good compliance with experimental results.

Fayez Shakil Ahmed; Salah Laghrouche; Adeel Mehmood; Mohammed El Bagdouri

2014-01-01T23:59:59.000Z

354

Medicine Bow Wind Farm IV | Open Energy Information  

Open Energy Info (EERE)

Medicine Bow Wind Farm IV Medicine Bow Wind Farm IV Facility Medicine Bow Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Platte River Power Authority Developer Northern Alternative Energy Energy Purchaser Platte River Power Authority Location Medicine Bow WY Coordinates 41.927554°, -106.371968° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.927554,"lon":-106.371968,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

355

McNeilus Wind Farm IV | Open Energy Information  

Open Energy Info (EERE)

IV IV Facility McNeilus Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner G. McNeilus Developer G. McNeilus Energy Purchaser Xcel Energy Location Mower County MN Coordinates 43.673251°, -92.665436° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.673251,"lon":-92.665436,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

356

Ridgetop Energy Wind Farm IV | Open Energy Information  

Open Energy Info (EERE)

IV IV Facility Ridgetop Energy Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Caithness Energy Purchaser Southern California Edison Co Location Tehachapi CA Coordinates 35.1317°, -118.451° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.1317,"lon":-118.451,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

357

SEGS IV Solar Power Plant | Open Energy Information  

Open Energy Info (EERE)

Solar Power Plant Solar Power Plant Jump to: navigation, search Name SEGS IV Solar Power Plant Facility SEGS IV Sector Solar Facility Type Concentrating Solar Power Developer Luz Location Kramer Junction, California Coordinates 34.9925°, -117.540833° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.9925,"lon":-117.540833,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

358

Safety evaluation of RTG launches aboard Titan IV launch vehicles  

SciTech Connect (OSTI)

The analytical tool used to evaluate accidents aboard a Titan IV launch vehicle involving a Radioisotope Thermoelectric Generator (RTG) is discussed. The Launch Accident Scenario Evaluation Program-Titan IV version (LASEP-T) uses a Monte Carlo approach to determine the response of an RTG to various threatening environments. The threatening environments arise from a complex interplay of probabilistic and deterministic processes, and are therefore parameterized by a set of random variables with probability distributions. The assessment of the RTG response to a given environment is based on both empirical data and theoretical modeling. Imbedding detailed, complex response models into the LASEP-T calculation was not practical. Simpler response models have been constructed to capture both the inherent variability due to the phenomenology of the accident scenario along with the uncertainty of predicting response behavior. The treatment of variability and uncertainty as it pertains to the launch accident evaluation of RTG response will be discussed.

Rosko, Robert J.; Loughin, Stephen [Lockheed Martin Missiles and Space P.O. Box 8555 Philadelphia, Pennsylvania 19101 (United States)

1997-01-10T23:59:59.000Z

359

IV Festival Controamericano de Teatro: El Salvador 96  

E-Print Network [OSTI]

FALL 1997 151 IV Festival Centroamericano de Teatro: El Salvador 96 Beatriz J. Rizk En la ciudad de San Salvador, la llamada apropiadamente Valle de las Hamacas por sus temblores de tierra que parecen formar parte de las actividades cotidianas... Honduras, Costa Rica, El Salvador y Guatemala, además de contar con la participación de Cuba, Argentina, Estados Unidos y México. Para la ocasión se utilizaron tres espacios de manera simultánea: la Gran Sala y la Pequeña Sala del fastuoso Teatro...

Rizk, Beatriz J.

1997-10-01T23:59:59.000Z

360

Teaching solar cell I-V characteristics using SPICE  

Science Journals Connector (OSTI)

The basic equivalent circuit of a p-n junctionsolar cell is most commonly represented as consisting of a current source in parallel with two diodes and two parasitic resistances. The output of a solar cell is measured by obtaining the current-voltage (I–V) characteristics for different illumination intensities and various parameters are extracted from these characteristics. Because the nature of the information derived from these characteristics is not obvious to the beginning students in photovoltaics a simulation using SPICE was utilized to explain three solar cellI–V characteristics—dark I–V illuminated I–V and open circuit voltage versus the short circuit current (illumination intensity). Students can construct a solar cell and study the effect of the diode and parasitic parameters on the three output I–Vcharacteristics. Series and parallel combinations of solar cells for arrays and modules using bypass diodes are demonstrated using SPICE as educational tools for understanding the role of bypass diodes.

Archana Devasia; Santosh K. Kurinec

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

C-terminal region of DNA ligase IV drives XRCC4/DNA ligase IV complex to chromatin  

SciTech Connect (OSTI)

Highlights: •Chromatin binding of XRCC4 is dependent on the presence of DNA ligase IV. •C-terminal region of DNA ligase IV alone can recruit itself and XRCC4 to chromatin. •Two BRCT domains of DNA ligase IV are essential for the chromatin binding of XRCC4. -- Abstract: DNA ligase IV (LIG4) and XRCC4 form a complex to ligate two DNA ends at the final step of DNA double-strand break (DSB) repair through non-homologous end-joining (NHEJ). It is not fully understood how these proteins are recruited to DSBs. We recently demonstrated radiation-induced chromatin binding of XRCC4 by biochemical fractionation using detergent Nonidet P-40. In the present study, we examined the role of LIG4 in the recruitment of XRCC4/LIG4 complex to chromatin. The chromatin binding of XRCC4 was dependent on the presence of LIG4. The mutations in two BRCT domains (W725R and W893R, respectively) of LIG4 reduced the chromatin binding of LIG4 and XRCC4. The C-terminal fragment of LIG4 (LIG4-CT) without N-terminal catalytic domains could bind to chromatin with XRCC4. LIG4-CT with W725R or W893R mutation could bind to chromatin but could not support the chromatin binding of XRCC4. The ability of C-terminal region of LIG4 to interact with chromatin might provide us with an insight into the mechanisms of DSB repair through NHEJ.

Liu, Sicheng; Liu, Xunyue; Kamdar, Radhika Pankaj; Wanotayan, Rujira; Sharma, Mukesh Kumar [Research Laboratory for Nuclear Reactors and Department of Nuclear Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8550 (Japan)] [Research Laboratory for Nuclear Reactors and Department of Nuclear Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8550 (Japan); Adachi, Noritaka [Graduate School of Nanobioscience, Yokohama City University, Yokohama 236-0027 (Japan)] [Graduate School of Nanobioscience, Yokohama City University, Yokohama 236-0027 (Japan); Matsumoto, Yoshihisa, E-mail: yoshim@nr.titech.ac.jp [Research Laboratory for Nuclear Reactors and Department of Nuclear Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8550 (Japan)] [Research Laboratory for Nuclear Reactors and Department of Nuclear Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8550 (Japan)

2013-09-20T23:59:59.000Z

362

Wind Tunnel Aerodynamic Tests of Six Airfoils for Use on Small Wind Turbines; Period of Performance: October 31, 2002--January 31, 2003  

SciTech Connect (OSTI)

Wind Tunnel Aerodynamic Tests of Six Airfoils for Use on Small Wind Turbinesrepresents the fourth installment in a series of volumes documenting the ongoing work of th University of Illinois at Urbana-Champaign Low-Speed Airfoil Tests Program. This particular volume deals with airfoils that are candidates for use on small wind turbines, which operate at low Reynolds numbers.

Selig, M. S.; McGranahan, B. D.

2004-10-01T23:59:59.000Z

363

Journal of Wind Engineering and Industrial Aerodynamics, 30 (1988) 233-241 233 Elsevier Science Publishers B.V., Amsterdam --Printed in The Netherlands  

E-Print Network [OSTI]

Journal of Wind Engineering and Industrial Aerodynamics, 30 (1988) 233-241 233 Elsevier Science Publishers B.V., Amsterdam -- Printed in The Netherlands EFFECT OF PARAMETRIC UNCERTAINTIES ON WIND EXCITED the influence of parametric uncertainties on the wind excited response of structures. Based on the available

Kareem, Ahsan

364

Determination of the solubility of Np(IV), Pu(III) - (VI),Am(III) - (VI), and Te(IV), (V) hydroxo compounds in 0.5 - 14 M NaOH solutions  

SciTech Connect (OSTI)

The solubilities of Am(III), Np(IV), Pu(IV), Tc(IV), Np(V), Pu(V), Am(V), and Tc(V) hydroxo compounds were studied in 0.5 to 14 M NaOH solutions at 25{+-}2 {degrees}C. The effects of fluoride, phosphate, carbonate, oxalate, and some other organic complexing agents on the solubilities of Np(IV), Pu(IV), and TC(IV) hydroxides were investigated at 1.0 and 4.0 M NAOH. Some predictions were made on the dissolved (I.V) and (V) species present in alkali solutions.

Delegard, C.H.

1996-09-24T23:59:59.000Z

365

Supporting Technology for Enhanced Oil Recovery-EOR Thermal Processes Report IV-12  

SciTech Connect (OSTI)

This report contains the results of efforts under the six tasks of the Ninth Amendment and Extension of Annex IV, Enhanced Oil Recovery Thermal Processes of the Venezuela/USA Agreement. The report is presented in sections (for each of the 6 tasks) and each section contains one or more reports prepared by various individuals or groups describing the results of efforts under each of the tasks. A statement of each task, taken from the agreement, is presented on the first page of each section. The tasks are numbered 62 through 67. The first, second, third, fourth, fifth, sixth, seventh, eight, and ninth reports on Annex IV, [Venezuela MEM/USA-DOE Fossil Energy Report IV-1, IV-2, IV-3, IV-4, IV-5, IV-6, IV-7, and IV-8 (DOE/BETC/SP-83/15, DOE/BC-84/6/SP, DOE/BC-86/2/SP, DOE/BC-87/2/SP, DOE/BC-89/1/SP, DOE/BC-90/1/SP) DOE/BC-92/1/SP, DOE/BC-93/3/SP, and DOE/BC-95/3/SP] contain the results from the first 61 tasks. Those reports are dated April 1983, August 1984, March 1986, July 1! 987, November 1988, December 1989, October 1991, February 1993, and March 1995 respectively.

Izequeido, Alexandor

2001-04-01T23:59:59.000Z

366

Modeling the Arm II core in MicroCap IV  

SciTech Connect (OSTI)

This paper reports on how an electrical model for the core of the Arm II machine was created and how to use this model. We wanted to get a model for the electrical characteristics of the ARM II core, in order to simulate this machine and to assist in the design of a future machine. We wanted this model to be able to simulate saturation, variable loss, and reset. Using the Hodgdon model and the circuit analysis program MicroCap IV, this was accomplished. This paper is written in such a way as to allow someone not familiar with the project to understand it.

Dalton, A.C.

1996-11-01T23:59:59.000Z

367

Texas Rice, Volume IV, Number 9, Winter Issue  

E-Print Network [OSTI]

Texas A&M University System Agricultural Research and Extension Center Beaumont, Texas Winter 2004 Volume IV Number 9 Texas Rice Web Management Tool To Help Monitor Grain Storage continued on page 6 Grain Moth http...://beaumont.tamu.edu/RiceSSWeb From planting, through matu- ration and harvest, farmers must keep a continuous watch to make sure their crop is protected. Yet, getting the crop out of the field and into storage bins doesn’t mean the grain is safe from damage. The big- gest threats...

2004-01-01T23:59:59.000Z

368

F-Area Type IV Tank Liner Life Estimation  

SciTech Connect (OSTI)

The Savannah River Site (SRS) is proceeding with closure of the Type IV waste tanks that are located in F-area. These tanks are underground concrete vaults and have been in service since the early 1960's. The interior of the concrete vault is lined with carbon steel plate. The time necessary for the carbon steel plate to disintegrate was estimated. These calculations assumed that the concrete structure was degraded and therefore the exterior of the liner is exposed to the soil conditions. Two corrosion mechanisms were examined: pitting and general corrosion. Data from soil corrosion studies performed by the National Bureau of Standards (NBS) was utilized to estimate the corrosion rate of the carbon steel liner. The following conclusions were made: (1) Cecil Clay Loam in Atlanta, Georgia, a soil tested by the NBS, is representative of the SRS soil conditions near the F-Area Type IV tanks. (2) The time to tank wall disintegration due to general corrosion only was estimated to be 770 years after concrete vault failure. (3) The time to tank wall disintegration due to pitting corrosion was estimated to be 675 years after concrete vault failure. (4) The lower bound estimate for the time to tank wall disintegration is 675 years.

Wiersman, B. J.

2005-10-01T23:59:59.000Z

369

Generation IV PR and PP Methods and Applications  

SciTech Connect (OSTI)

This paper presents an evaluation methodology for proliferation resistance and physical protection (PR&PP) of Generation IV nuclear energy systems (NESs). For a proposed NES design, the methodology defines a set of challenges, analyzes system response to these challenges, and assesses outcomes. The challenges to the NES are the threats posed by potential actors (proliferant States or sub-national adversaries). The characteristics of Generation IV systems, both technical and institutional, are used to evaluate the response of the system and determine its resistance against proliferation threats and robustness against sabotage and terrorism threats. The outcomes of the system response are expressed in terms of six measures for PR and three measures for PP, which are the high-level PR&PP characteristics of the NES. The methodology is organized to allow evaluations to be performed at the earliest stages of system design and to become more detailed and more representative as design progresses. Uncertainty of results are recognized and incorporated into the evaluation at all stages. The results are intended for three types of users: system designers, program policy makers, and external stakeholders. Particular current relevant activities will be discussed in this regard. The methodology has been illustrated in a series of demonstration and case studies and these will be summarized in the paper.

Bari,R.A.

2008-10-13T23:59:59.000Z

370

EIS-0402: Santa Susana Field Laboratory Area IV, California | Department of  

Broader source: Energy.gov (indexed) [DOE]

2: Santa Susana Field Laboratory Area IV, California 2: Santa Susana Field Laboratory Area IV, California EIS-0402: Santa Susana Field Laboratory Area IV, California Summary This EIS evaluates the environmental impacts of remediation of Area IV of the Santa Susana Field Laboratory (SSFL Area IV). SSFL Area IV, occupying approximately 290 acres of the total 2,852-acre SSFL site is located in the hills between Chatsworth and Simi Valley, CA, and was developed as a remote site to test rocket engines and conduct nuclear research. This EIS will evaluate alternatives for disposition of radiological facilities and support buildings, remediation of the affected environment, and disposal of all resulting waste at existing, approved sites. Public Comment Opportunities No public comment opportunities available at this time.

371

E-Print Network 3.0 - annual iv zoledronic Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Corporation Prostate Cancer Summary: to treatment with zoledronic acid (4 mg) IV infusion or placebo every 3 months. BMD of the lumbar spine, left... randomly assigned to...

372

Regularities of the influence of the aerodynamic coupling of blades on the formation of the spectrum of natural vibrations of the rims of turbine wheels of gas-turbine engines  

Science Journals Connector (OSTI)

We present the results of analytic and numerical investigations aimed at the evaluation of the influence of the aerodynamic coupling of blades on the formation of the spectrum of natural vibrations of the rims...

A. P. Zinkovskii; A. V. Poberezhnikov; V. A. Tsimbalyuk

2010-10-01T23:59:59.000Z

373

EXHIBIT IV DOE/EV-0003/29 ORNL-5734  

Office of Legacy Management (LM)

v EXHIBIT IV - DOE/EV-0003/29 ORNL-5734 Radiological Survey of the Former Kellex Research Facility, Jersey City, New Jersey 6. A. Berven H. W. Dickson W. A. Goldsmith W. M. Johnson W. D. Cottrell R. W. Doane F. F. Haywood M. T. Ryan W. H. Shinpaugh DOE/EV-0005/29 ORNL-5734 Dist. Category UC-70 Contract No. W-7405-eng-26 Health and Safety Research Division RADIOLOGICAL SURVEY OF THE FORMER KELLEX RESEARCH FACILITY, JERSEY CITY, NEW JERSEY B. A. Berven W. D. Cottrell H. W. Dickson R. W. Doane W. A. Goldsmith F. F. Haywood W. M. Johnson M. T. Ryan W. H. Shinpaugh Worked performed as part of the Remedial Action Survey and Certification Activities Date Published: February 1982 , OAK RIDGE NATIONAL LABORATORY operated by UNION'CARBIDE CORPORATION for the

374

IvPE-cEAEs?nILE!! P  

Office of Legacy Management (LM)

Cw-rent: _______ rT--- Cw-rent: _______ rT--- Owner contacted 0 yes J7' j-r~~; if ye.. date contacted ___ IvPE-cEAEs?nILE!! P Research & Development 0 Production scale testing Cl Pilot Scale 0 Bench Scale Process 0 Theoretical Studies 0 Sample & Analysis 0 Production 0 Disposal/Storage 0 Prime ,!Z! Subcontract& JZl Purchase Order q Facility Type q Manufacturing q University 0 Research Organization 0 Government Sponsored Facility 0 Other --------------------- [7 Other information (i.e., cost + fixed fee, unit price, time & material, etc)------- OWNERSHIP: AEC/tlED AEC/MED GOVT GOVT CONTRACTOR CONTRACTOR OWNE_D LEfEEE !a!N_E_D !E!_sED OWNED ---------- ---LEASED LANDS BUILDINGS !I : 0 # % :: EQUIPMENT ; 0 0 1 ORE OR RAW MATL 0 0 FINAL PRODUCT 0 WASTE & RESIDUE q

375

Generation IV International Forum Signs Agreement to Collaborate on Sodium  

Broader source: Energy.gov (indexed) [DOE]

Forum Signs Agreement to Collaborate on Forum Signs Agreement to Collaborate on Sodium Cooled Fast Reactors Generation IV International Forum Signs Agreement to Collaborate on Sodium Cooled Fast Reactors February 17, 2006 - 11:58am Addthis FUKUI , JAPAN - The Department of Energy today announced that the United States signed a sodium-cooled fast reactor systems arrangement with France and Japan, providing the framework for collaboration among these countries on the research and development of these advanced nuclear reactors. The signing of the agreement took place on February 16, 2006. This arrangement will support the development of technologies associated with the U.S.-led Global Nuclear Energy Partnership (GNEP), announced earlier this month by Secretary of Energy Samuel W. Bodman. GNEP is a

376

8 - Mobile Robot Control IV: Fuzzy and Neural Methods  

Science Journals Connector (OSTI)

Fuzzy logic systems (or, simply, fuzzy systems, FSs) and neural networks are universal approximators, that is, they can approximate any nonlinear function (mapping) with any desired accuracy, and have found wide application in the identification, planning, and model-free control of complex nonlinear systems, such as robotic systems and industrial processes. Fuzzy logic offers a linguistic (approximate) way of drawing conclusions from uncertain data, and neural networks offer the capability of learning and training with or without a teacher (supervisor). The objectives of this chapter are the following: (i) to provide a brief introduction to neural networks and fuzzy systems, (ii) to derive and discuss the general structure of fuzzy and neural robot controllers, (iii) to provide the details of mobile (nonholonomic) fuzzy tracker controller design, (iv) to fuzzy the model-based sliding mode controller and apply it to mobile robots, and (v) to solve the mobile adaptive tracking controller design problem using multilayer perceptrons and radial basis function neural networks.

Spyros G. Tzafestas

2014-01-01T23:59:59.000Z

377

A survey of ideal fluid propeller theories and a study of the effects of aerodynamic propeller loading on trailing vortex induced velocity and thrust  

E-Print Network [OSTI]

A SURVEY OF IDEAL FLUID PRO~ THEORIES AND A STUIE OP THE EFFECTS OF AERODYNAMIC PRO~ LOADING ON TRAILING VORTEX INDUCED VELOCITY AND THRUST A Thesis EDWARD MADISON ~ Suhmitted to the Graduate College of Texas A&M University in Partial... fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1969 h'h, jor Suhgect: Mechanical Engineering A SURVEY OF IDEAL FLUID PROPELLEB THEORIES AND A STUDY OF THE EFFKTS OF AERODYKVGC PROPELLER LOADING ON TRAILING VORTEX INDUCED...

Kelley, Edward Madison

2012-06-07T23:59:59.000Z

378

SCR as an IV&V Tool Steve Easterbrook and John Callahan  

E-Print Network [OSTI]

SCR as an IV&V Tool Steve Easterbrook and John Callahan fsteve,callahang@cerc.wvu.edu NASA West of SCR-style speci cation as a tool for Independent Veri cation and Validation IV&V. Our intention processes. However, there are a number of problems that need to be solved before SCR-style methods can

Easterbrook, Steve

379

COMPUTATIONS OF NUCLEAR RESPONSE FUNCTIONS WITH MACK-IV M. A. Abdou and Y. Gohar  

E-Print Network [OSTI]

on The Technology of Controlled Nuclear Fusion May 9-11f 1978 Santa Fer NM UofGAUAUSQOE ARGONNE NATIONAL LABORATORY OF NUCLEAR RESPONSE FUNCTIONS WITH MACK-IV M. A. Abdou and Y. Gohar APPLIED PHYSICS DIVISION, ARGONNECOMPUTATIONS OF NUCLEAR RESPONSE FUNCTIONS WITH MACK-IV M. A. Abdou and Y. Gohar Ttm ttpait * i

Abdou, Mohamed

380

Houston, We Have a Success Story: Technology Transfer at the NASA IV&V Facility  

E-Print Network [OSTI]

Houston, We Have a Success Story: Technology Transfer at the NASA IV&V Facility Ken McGill, Wes of and technology transfer from NASA's research program in Independent Verification and Validation (IV, Verification. Keywords Technology transfer, Independent Verification and Validation, Research. 1. INTRODUCTION

Dekhtyar, Alexander

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Plutonium(IV) precipitates formed in alkaline media in the presence of various anions  

SciTech Connect (OSTI)

The tendency of Pu(IV) to hydrolyze and form true solutions, colloid solutions, or insoluble precipitates has been known since the Manhattan Project. Since then, specific studies have been performed to examine in detail the equilibria of Pu(IV) hydrolytic reactions in various media. Great attention also has been paid to the preparation, structure, and properties of Pu(IV) polymers or colloids. These compounds found an important application in sol-gel technology for the preparation of nuclear fuel materials. A most important result of these works was the conclusion that Pu(IV) hydroxide, after some aging, consists of very small PuO{sub 2} crystallites and should therefore be considered to be Pu(IV) hydrous oxide. However, studies of the properties and behavior of solid Pu(IV) hydroxide in complex heterogeneous systems are rare. The primary goal of this investigation was to obtain data on the composition and properties of Pu(IV) hydrous oxide or other compounds formed in alkaline media under different conditions. Such information is important to understand Pu(IV) behavior and the forms of its existence in the Hanford Site alkaline tank waste sludge. This knowledge then may be applied in assessing plutonium criticality hazards in the storage, retrieval, and treatment of Hanford Site tank wastes as well as in understanding its contribution to the transuranic waste inventory (threshold at 100 nCi/g or about 5 {times} 10{sup {minus}6} M) of the separate solution and solid phases.

Krot, N.N.; Shilov, V.P.; Yusov, A.B.; Tananaev, I.G.; Grigoriev, M.S.; Garnov, A.Yu.; Perminov, V.P.; Astafurova, L.N.

1998-09-01T23:59:59.000Z

382

RESEARCH ARTICLE Open Access Cross-national epidemiology of DSM-IV major  

E-Print Network [OSTI]

RESEARCH ARTICLE Open Access Cross-national epidemiology of DSM-IV major depressive episode Evelyn of adults. Results: The average lifetime and 12-month prevalence estimates of DSM-IV MDE were 14.6% and 5 as defined by the Diagnostic and Sta- tistical Manual of Mental Disorders, third edition (DSM-III) from 10

Paris-Sud XI, Université de

383

DOE Hydrogen Program FY 2005 Progress Report IV.F Photoelectrochemical  

E-Print Network [OSTI]

barriers from the Hydrogen Production section of the Hydrogen, Fuel Cells and Infrastructure TechnologiesDOE Hydrogen Program FY 2005 Progress Report 13 IV.F Photoelectrochemical IV.F.1 High-Efficiency Generation of Hydrogen Using Solar Thermochemical Splitting of Water - UNLV: Photoelectrochemical Hydrogen

384

Enhanced-oil-recovery thermal processes, annex IV. Venezuela-MEM/USA-DOE fossil-energy report IV-1  

SciTech Connect (OSTI)

The Agreement between the United States and Venezuela was designed to further energy research and development in six areas. This report focuses on Annex IV - Enhanced-Oil-Recovery Thermal Processes which was divided into seven tasks. This report will discuss the information developed within Task I related to the Department of Energy providing data on the performance of insulated oil-well tubulars. Surface generated steam has been traditionally used in thermal enhanced oil recovery processes. In past years the tubing through which the steam is injected into the reservoir has been bare with relatively high heat losses. In recent years however various materials and designs for insulating the tubing to reduce heat losses have been developed. Evaluation of several of these designs in an instrumented test tower and in an oil field test environment was undertaken. These tests and the resulting data are presented.

Peterson, G.; Schwartz, E.

1983-04-01T23:59:59.000Z

385

Boattail Plates With Non-Rectangular Geometries For Reducing Aerodynamic Base Drag Of A Bluff Body In Ground Effect  

DOE Patents [OSTI]

An apparatus for reducing the aerodynamic base drag of a bluff body having a leading end, a trailing end, a top surface, opposing left and right side surfaces, and a base surface at the trailing end substantially normal to a longitudinal centerline of the bluff body, with the base surface joined (1) to the left side surface at a left trailing edge, (2) to the right side surface at a right trailing edge, and (3) to the top surface at a top trailing edge. The apparatus includes left and right vertical boattail plates which are orthogonally attached to the base surface of the bluff body and inwardly offset from the left and right trailing edges, respectively. This produces left and right vertical channels which generate, in a flowstream substantially parallel to the longitudinal centerline, respective left and right vertically-aligned vortical structures, with the left and right vertical boattail plates each having a plate width defined by a rear edge of the plate spaced from the base surface. Each plate also has a peak plate width at a location between top and bottom ends of the plate corresponding to a peak vortex of the respective vertically-aligned vortical structures.

Ortega, Jason M. (Pacifica, CA); Sabari, Kambiz (Livermore, CA)

2006-03-07T23:59:59.000Z

386

Extraction behavior of uranium(VI), plutonium(IV), zirconium(IV), ruthenium(III) and europium(III) with ?-pre-irradiated solutions of N,N?-methylbutyl substituted amides in n-dodecane  

Science Journals Connector (OSTI)

The extraction of plutonium(IV), uranium(VI), zirconium(IV), europium(III) and ruthenium(III) with ?-pre-irradiated n-dodecane solutions of methylbutyl substituted hexanamide (MBHA), octanamide (MBOA) and deca...

P. B. Ruikar; M. S. Nagar; M. S. Subramanian…

1995-09-15T23:59:59.000Z

387

Method PAD Districts I II III IV V United States  

U.S. Energy Information Administration (EIA) Indexed Site

Method Method PAD Districts I II III IV V United States Table 9. Refinery Receipts of Crude Oil by Method of Transportation by PAD District, 2012 (Thousand Barrels) Pipeline Domestic 3,989 665,625 988,103 88,072 243,055 1,988,844 Foreign 21,230 569,209 374,991 81,074 55,191 1,101,695 Tanker Domestic 3,537 0 6,795 0 182,822 193,154 Foreign 269,722 0 1,261,640 0 367,865 1,899,227 Barge Domestic 11,303 8,899 130,591 0 408 151,201 Foreign 12,497 596 43,718 0 23,652 80,463 Tank Cars Domestic 5,916 2,070 12,072 0 10,027 30,085 Foreign 3,685 0 235 0 194 4,114 Trucks Domestic 3,715 7,856 73,171 39,163 7,347 131,252 Foreign 0 0 0 0 0 0 Total Domestic 28,460 684,450 1,210,732 127,235 443,659 2,494,536 Foreign 307,134 569,805 1,680,584 81,074 446,902 3,085,499

388

Commodity PAD Districts I II III IV V United States  

U.S. Energy Information Administration (EIA) Indexed Site

Commodity Commodity PAD Districts I II III IV V United States Table 10a. Fuel Consumed at Refineries by PAD District, 2012 (Thousand Barrels, Except Where Noted) Crude Oil 0 0 0 0 0 0 Liquefied Petroleum Gases 0 464 490 49 518 1,521 Distillate Fuel Oil 4 89 236 1 209 539 Residual Fuel Oil 26 18 11 16 469 540 Still Gas 13,838 50,328 108,359 8,694 38,875 220,094 Marketable Petroleum Coke 0 0 0 528 166 694 Catalyst Petroleum Coke 9,003 17,611 42,614 2,852 12,416 84,496 Natural Gas (million cubic feet) 38,347 143,702 474,359 26,971 159,849 843,228 Coal (thousand short tons) 30 0 0 0 0 30 Purchased Electricity (million kWh) 2,355 11,892 23,255 2,003 5,130 44,635 Purchased Steam (million pounds) 3,849 12,723 88,922 1,439 14,426 121,359 Other Products 40 47 677 67 1,141 1,972

389

Rocky Mountain area petroleum product availability with reduced PADD IV refining capacity  

SciTech Connect (OSTI)

Studies of Rocky Mountain area petroleum product availability with reduced refining capacity in Petroleum Administration for Defense IV (PADD IV, part of the Rocky Mountain area) have been performed with the Oak Ridge National Laboratory Refinery Yield Model, a linear program which has been updated to blend gasolines to satisfy constraints on emissions of nitrogen oxides and winter toxic air pollutants. The studies do not predict refinery closures in PADD IV. Rather, the reduced refining capacities provide an analytical framework for probing the flexibility of petroleum refining and distribution for winter demand conditions in the year 2000. Industry analysts have estimated that, for worst case scenarios, 20 to 35 percent of PADD IV refining capacity could be shut-down as a result of clean air and energy tax legislation. Given these industry projections, the study scenarios provide the following conclusions: The Rocky Mountain area petroleum system would have the capability to satisfy winter product demand with PADD IV refinery capacity shut-downs in the middle of the range of industry projections, but not in the high end of the range of projections. PADD IV crude oil production can be maintained by re-routing crude released from PADD IV refinery demands to satisfy increased crude oil demands in PADDs II (Midwest), III (Gulf Coast), and Washington. Clean Air Act product quality regulations generally do not increase the difficulty of satisfying emissions reduction constraints in the scenarios.

Hadder, G.R.; Chin, S.M.

1994-02-01T23:59:59.000Z

390

Product: Tetrakis(dimethylamino)titanium(IV) P-6331 Date: February 2005 Copyright 2005, Praxair Technology, Inc. Page 1 of 8  

E-Print Network [OSTI]

Product: Tetrakis(dimethylamino)titanium(IV) P-6331 Date: February 2005 Copyright © 2005, Praxair Technology, Inc. Page 1 of 8 All rights reserved. Praxair Material Safety Data Sheet 1. Chemical Product-(dimethylamino)titanium(IV)] (MSDS No. P-6331) Trade Name: Praxair® TDMAT Chemical Name: Tetrakis(dimethylamino)titanium(IV) Synonyms

Rubloff, Gary W.

391

Microsoft Word - Outside_CoverFinalEIS Volume IV.doc  

Broader source: Energy.gov (indexed) [DOE]

IV - Public Comments IV - Public Comments June 2009 Big Stone II Power Plant and Transmission Project Prepared for: Lead Agency: Western Area Power Administration Cooperating Agency: U.S. Army Corps of Engineers DOE/EIS-0377 Final Environmental Impact Statement Volume IV - Public Comments June 2009 Big Stone II Power Plant and Transmission Project Prepared for: Lead Agency: Western Area Power Administration Cooperating Agency: U.S. Army Corps of Engineers VOLUME CONTENTS Volume I Executive Summary Acronyms Table of Contents Chapter 1 - Introduction Chapter 2 - Proposed Project, Proposed Federal Actions, and Alternatives Chapter 3 - Affected Environment Chapter 4 - Environmental Consequences

392

Solvent Extraction Behavior of Plutonium (IV) Ions in the Presence of Simple Hydroxamic Acids  

SciTech Connect (OSTI)

Formo-and aceto-hydroxamic acids are very effective reagents for stripping Pu(IV) ions from a tri-butyl phosphate phase into nitric acid. Distribution data for Pu(IV) in the presence of these hydroxamate ions have been obtained and trends established. The affinity of aceto-hydroxamic acid for Pu(IV) ions and its selectivity over U(VI) ions is demonstrated by the values of the stability constants in HCIO4. These data support the applications of simple hydroxamic acids in advanced Purex-type solvent extraction systems.

Carrott, M. J.; Fox, O. D.; Maher, C. J.; Mason, C.; Taylor, Robin J.; Sinkov, Sergey I.; Choppin, Gregory R.

2007-11-15T23:59:59.000Z

393

Computational mechanics research and support for aerodynamics and hydraulics at TFHRC, year 1 quarter 3 progress report.  

SciTech Connect (OSTI)

The computational fluid dynamics (CFD) and computational structural mechanics (CSM) focus areas at Argonne's Transportation Research and Analysis Computing Center (TRACC) initiated a project to support and compliment the experimental programs at the Turner-Fairbank Highway Research Center (TFHRC) with high performance computing based analysis capabilities in August 2010. The project was established with a new interagency agreement between the Department of Energy and the Department of Transportation to provide collaborative research, development, and benchmarking of advanced three-dimensional computational mechanics analysis methods to the aerodynamics and hydraulics laboratories at TFHRC for a period of five years, beginning in October 2010. The analysis methods employ well-benchmarked and supported commercial computational mechanics software. Computational mechanics encompasses the areas of Computational Fluid Dynamics (CFD), Computational Wind Engineering (CWE), Computational Structural Mechanics (CSM), and Computational Multiphysics Mechanics (CMM) applied in Fluid-Structure Interaction (FSI) problems. The major areas of focus of the project are wind and water loads on bridges - superstructure, deck, cables, and substructure (including soil), primarily during storms and flood events - and the risks that these loads pose to structural failure. For flood events at bridges, another major focus of the work is assessment of the risk to bridges caused by scour of stream and riverbed material away from the foundations of a bridge. Other areas of current research include modeling of flow through culverts to assess them for fish passage, modeling of the salt spray transport into bridge girders to address suitability of using weathering steel in bridges, vehicle stability under high wind loading, and the use of electromagnetic shock absorbers to improve vehicle stability under high wind conditions. This quarterly report documents technical progress on the project tasks for the period of April through June 2011.

Lottes, S.A.; Kulak, R.F.; Bojanowski, C. (Energy Systems)

2011-08-26T23:59:59.000Z

394

China and Russia to Join the Generation IV International Forum | Department  

Broader source: Energy.gov (indexed) [DOE]

China and Russia to Join the Generation IV International Forum China and Russia to Join the Generation IV International Forum China and Russia to Join the Generation IV International Forum July 13, 2006 - 3:03pm Addthis International Scope of Nuclear Nations Pursuing Advanced Reactors Broadens WASHINGTON, DC - U.S. Department of Energy Assistant Secretary for Nuclear Energy Dennis Spurgeon today announced that China and Russia are expected to join the Generation IV International Forum (GIF), a group of the world's leading nuclear nations who are working together to develop more efficient and less waste-intensive advanced reactors to meet future energy challenges. Earlier today, the GIF Policy Group voted unanimously to extend an offer of membership to China and Russia. China and Russia's formal entry into GIF is expected to be finalized by November 2006.

395

O'Brien Biogas IV LLC Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

O'Brien Biogas IV LLC Biomass Facility O'Brien Biogas IV LLC Biomass Facility Jump to: navigation, search Name O'Brien Biogas IV LLC Biomass Facility Facility O'Brien Biogas IV LLC Sector Biomass Facility Type Landfill Gas Location Middlesex County, New Jersey Coordinates 40.4111363°, -74.3587473° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.4111363,"lon":-74.3587473,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

396

EIS-0469: Proposed Wilton IV Wind Energy Center Project, Burleigh County,  

Broader source: Energy.gov (indexed) [DOE]

9: Proposed Wilton IV Wind Energy Center Project, Burleigh 9: Proposed Wilton IV Wind Energy Center Project, Burleigh County, North Dakota EIS-0469: Proposed Wilton IV Wind Energy Center Project, Burleigh County, North Dakota Summary Western Area Power Administration is evaluating the potential environmental impacts of interconnecting NextEra Energy Resources proposed Wilton IV Wind Energy Center Project, near Bismarck, North Dakota, to Western's existing Wilton/Baldwin substation and allowing NextEra's existing wind projects in this area to operate above 50 annual MW. Western is preparing a Supplemental Draft EIS to address substantial changes to the proposal, including 30 turbine locations and 5 alternate turbine locations in Crofte Township. Public Comment Opportunities None available at this time. Documents Available for Download

397

China and Russia to Join the Generation IV International Forum | Department  

Broader source: Energy.gov (indexed) [DOE]

China and Russia to Join the Generation IV International Forum China and Russia to Join the Generation IV International Forum China and Russia to Join the Generation IV International Forum July 13, 2006 - 3:03pm Addthis International Scope of Nuclear Nations Pursuing Advanced Reactors Broadens WASHINGTON, DC - U.S. Department of Energy Assistant Secretary for Nuclear Energy Dennis Spurgeon today announced that China and Russia are expected to join the Generation IV International Forum (GIF), a group of the world's leading nuclear nations who are working together to develop more efficient and less waste-intensive advanced reactors to meet future energy challenges. Earlier today, the GIF Policy Group voted unanimously to extend an offer of membership to China and Russia. China and Russia's formal entry into GIF is expected to be finalized by November 2006.

398

Controlled Substance Security Plan (Schedules I, II, III, IV and V Controlled Substances)  

E-Print Network [OSTI]

Controlled Substance Security Plan (Schedules I, II, III, IV and V Controlled Substances) Guidelines for Acquiring & Accounting for Controlled Substances for Scientific Use Lawrence Berkeley National;LAWRENCEBERKELEYr\\IATIOMLI-ABOMTORY CONTROLLEDSUBSTANCEPROTOCOL (SCHEDULEr& il CONTROLLEDSUBSTANCES) Gontrolled

Eisen, Michael

399

Ultrastructure of the Reproductive System of the Black Swamp Snake (Seminatrix pygaea). IV. Occurrence of an  

E-Print Network [OSTI]

Ultrastructure of the Reproductive System of the Black Swamp Snake (Seminatrix pygaea). IV gefu¨llt sein." In the next paragraph, van den Broek turns his atten- tion to snakes and reported, "Auf

Sever, David M.

400

Subunit Compositions of the RNA-Silencing Enzymes Pol IV and...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Subunit Compositions of the RNA-Silencing Enzymes Pol IV and Pol V Reveal Their Origins as Specialized Forms of RNA Polymerase Subunit Compositions of the RNA-Silencing Enzymes Pol...

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Reforming the EU: The Future of European Law and Policy IV CONFERENCE PROGRAMME  

E-Print Network [OSTI]

Reforming the EU: The Future of European Law and Policy IV CONFERENCE session "Reforming the EU" Chair: Dr Luca Rubini, Deputy Director Institute Rubini Reforming European competition law: should the European Commission have

Birmingham, University of

402

Energy-level and lifetime measurements for Sb iv and Sb v  

Science Journals Connector (OSTI)

A study of the beam-foil spectrum produced by a 1-MeV beam of antimony ions has yielded lifetimes for nine lowlying terms of Sb iv and six of Sb v. Decay-curve analysis incorporating...

Pinnington, E H; Ansbacher, W; Kernahan, J A; Gosselin, R N; Bahr, J L; Inamdar, A S

1985-01-01T23:59:59.000Z

403

Mental health clinicians' views on superficial self-mutilation in the DSM-IV-TR.  

E-Print Network [OSTI]

?? Self-mutilation is a phenomenon that affects a significant percentage of the teenage and adult population. The Diagnostic and Statistical Manual of Mental Disorders (DSM-IV-TR)… (more)

Michaels, Thomas Roy

2010-01-01T23:59:59.000Z

404

Dimensional representations of DSM-IV personality disorders: relationships to functional impairment.  

E-Print Network [OSTI]

??OBJECTIVE: This study compared three-dimensional representations of DSM-IV personality disorders and standard categories with respect to their associations with psychosocial functioning. METHOD: Six hundred sixty-eight… (more)

Skodol, Andrew E.

2005-01-01T23:59:59.000Z

405

Two-Phase Equilibrium in Binary and Ternary Systems. IV. The Thermodynamic Properties of Propane  

Science Journals Connector (OSTI)

...IV. The Thermodynamic Properties of Propane J. H. Burgoyne Existing physical and thermal data relative to propane have been summarized and correlated...obtained the entropy and enthalpy of propane have been calculated for conditions of...

1940-01-01T23:59:59.000Z

406

Analysis of the raw data of sample plots in NFIMAP Cycle IV ...  

Open Energy Info (EERE)

Action Plan (PRAP). The report details the results of an analysis of the raw data of primary sample plots (PSPs) collected during Cycle IV of the National Forest Inventory and...

407

Architecture and urbanism in Henri IV's Paris : the Place Royale, Place Dauphine, and Hôpital St. Louis  

E-Print Network [OSTI]

This dissertation concerns the extensive building program which Henri IV undertook in Paris from 1600 to 1610. Focusing on the place Royale (now called the place des Vosges) , the place Dauphine, rue Dauphine, and Pont ...

Ballon, Hilary Meg

1985-01-01T23:59:59.000Z

408

Methylbutylmalonamide as an extractant for U(VI), Pu(IV) and Am(III)  

Science Journals Connector (OSTI)

The unsymmetrical diamide methylbuthylmalonamide has been synthesized and used in the extraction of U(VI), Pu(IV) and Am(III) in benzene medium. The distribution ratio for the three cations was found to increa...

G. M. Nair; D. R. Prabhu; G. R. Mahajan

1994-01-03T23:59:59.000Z

409

Dioctyl butyramide and dioctyl isobutyramide as extractants for uranium(VI) and plutonium(IV)  

Science Journals Connector (OSTI)

Two isomeric monoamides, dioctyl butyramide (DOBA) and dioctyl isobutyramide (DOIBA) were synthesized for extracting uranium(VI) and plutonium(IV) from aqueous nitric acid medium into various diluents such asn-do...

G. M. Nair; G. R. Mahajan; D. R. Prabhu

1996-03-01T23:59:59.000Z

410

A review of "Historiography at the Court of Christian IV." by Karen Skovgaard-Petersen  

E-Print Network [OSTI]

284 SEVENTEENTH-CENTURY NEWS Karen Skovgaard-Petersen. Historiography at the Court of Christian IV (1588-1648): Studies in the Latin Histories of Denmark by Johannes Pontanus and Johannes Meursius. Copenhagen: Museum Tusculanum Press, 2002.... Review by MARY E. AILES, UNIVERSITY OF NEBRASKA AT KEARNEY. Throughout his reign (1588-1648), Christian IV of Denmark filled his court with artists and scholars and encouraged a cultural renaissance partially to showcase his kingdom?s wealth, influence...

Mary E. Ailes

2002-01-01T23:59:59.000Z

411

Removal of Vanadium(IV) from Aqueous Solutions by Adsorption Process with Aluminum-Pillared Bentonite  

Science Journals Connector (OSTI)

The objective of this research work is to investigate the possibility of using a natural bentonite clay as a precursor to produce aluminum-pillared clay (Al?PILC) for the removal of vanadium(IV) from aqueous solutions. ... The original bentonite and Al?PILC were characterized with the help of surface area analyzer, X-ray diffraction, scanning electron microscopy, and potentiometric titration. ... The adsorption of vanadium(IV) onto Al?PILC has been dynamically and thermodynamically investigated. ...

D. M. Manohar; B. F. Noeline; T. S. Anirudhan

2005-07-08T23:59:59.000Z

412

EXAFS Study of Sn(IV) Immobilization by Hardened Cement Paste and Calcium Silicate Hydrates  

Science Journals Connector (OSTI)

An alternative structural model for Sn(IV) binding in HCP has been developed, assuming that ettringite is the uptake-controlling phase. ... Although there is no Al in C?S?H, Al is a possible second neighbor in HCP due to the presence of Al-containing phases, e.g., monosulfate, ettringite, and hydrogarnet. ... Preliminary experiments further support that ettringite could be a possible host phase for Sn(IV) (39). ...

Isabelle Bonhoure; Erich Wieland; André M. Scheidegger; Michael Ochs; Dominik Kunz

2003-04-12T23:59:59.000Z

413

C IV LINE-WIDTH ANOMALIES: THE PERILS OF LOW SIGNAL-TO-NOISE SPECTRA  

SciTech Connect (OSTI)

Comparison of six high-redshift quasar spectra obtained with the Large Binocular Telescope with previous observations from the Sloan Digital Sky Survey shows that failure to correctly identify absorption and other problems with accurate characterization of the C IV ?1549 emission line profile in low signal-to-noise (S/N) data can severely limit the reliability of single-epoch mass estimates based on the C IV emission line. We combine the analysis of these new high-quality data with a reanalysis of three other samples based on high-S/N spectra of the C IV emission line region. We find that a large scatter between the H?- and C IV-based masses remains even for this high-S/N sample when using the FWHM to characterize the broad-line region velocity dispersion and the standard virial assumption to calculate the mass. However, we demonstrate that using high-quality data and the line dispersion to characterize the C IV line width leads to a high level of consistency between C IV- and H?-based masses, with <0.3 dex of observed scatter and an estimated ?0.2 dex intrinsic scatter, in the mass residuals.

Denney, K. D.; Vestergaard, M. [Dark Cosmology Centre, Niels Bohr Institute, Juliane Maries Vej 30, DK-2100 Copenhagen Ø (Denmark); Pogge, R. W.; Kochanek, C. S.; Peterson, B. M. [Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210 (United States); Assef, R. J., E-mail: kelly@dark-cosmology.dk [Jet Propulsion Laboratory, California Institute of Technology, MS 169-530, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)

2013-09-20T23:59:59.000Z

414

Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines  

E-Print Network [OSTI]

Internal combustion engines dominate transportation of people and goods, contributing significantly to air pollution, and requiring large amounts of fossil fuels. With increasing public concern about the environment and ...

McClure, Fiona

2007-01-01T23:59:59.000Z

415

AIAA 960409 Automatic Aerodynamic  

E-Print Network [OSTI]

. Secondly, the complexity of the required calculations has lengthened the turn-around time to a point where with effectively. In the last four years, considerable efforts have been directed towards the solution of these two coefficient, lift/drag ratio, difference from a specified pressure distribution, etc.), it is customary

Jameson, Antony

416

The aerodynamic wall  

Science Journals Connector (OSTI)

...internal ballistics focuses on the physics of launching (inside the bore...of the beautiful game. Sport physics. Palaiseau, France: Editions...Haynes, MW (ed.) 2013 CRC handbook of chemistry and physics, vol. 93. New York, NY...

2014-01-01T23:59:59.000Z

417

Introduction. Computational aerodynamics  

Science Journals Connector (OSTI)

...for fans, turbines and compressors...inside modern gas turbine aeroengines...Eddy-resolving strategies that reduce...state-of-the-art and RANS development priorities...some cases, development impossible...systems in gas turbine aeroengines...

2007-01-01T23:59:59.000Z

418

On the role of Mn(IV) vacancies in the photoreductive dissolution of hexagonal birnessite  

SciTech Connect (OSTI)

Photoreductive dissolution of layer type Mn(IV) oxides (birnessite) under sunlight illumination to form soluble Mn(II) has been observed in both field and laboratory settings, leading to a consensus that this process is a key driver of the biogeochemical cycling of Mn in the euphotic zones of marine and freshwater ecosystems. However, the underlying mechanisms for the process remain unknown, although they have been linked to the semiconducting characteristics of hexagonal birnessite, the ubiquitous Mn(IV) oxide produced mainly by bacterial oxidation of soluble Mn(II). One of the universal properties of this biogenic mineral is the presence of Mn(IV) vacancies, long-identified as strong adsorption sites for metal cations. In this paper, the possible role of Mn vacancies in photoreductive dissolution is investigated theoretically using quantum mechanical calculations based on spin-polarized density functional theory (DFT). Our DFT study demonstrates unequivocally that Mn vacancies significantly reduce the band-gap energy for hexagonal birnessite relative to a hypothetical vacancy-free MnO{sub 2} and thus would increase the concentration of photo-induced electrons available for Mn(IV) reduction upon illumination of the mineral by sunlight. Calculations of the charge distribution in the presence of vacancies, although not fully conclusive, show a clear separation of photo-induced electrons and holes, implying a slow recombination of these charge-carriers that facilitates the two-electron reduction of Mn(IV) to Mn(II).

Kwon, K.D.; Refson, K.; Sposito, G.

2009-06-01T23:59:59.000Z

419

What every designated representative should know about Title IV and Title V enforcement provisions  

SciTech Connect (OSTI)

Title IV of the Clean Air Act not only created a regulatory program unlike any other under the Clean Air Act, but also established a unique position--the designated representative--as an integral part of the program. The designated representative is required to meet certain basic obligations under Title IV, and a panoply of enforcement mechanisms are available to EPA in the event of noncompliance with these obligations. Also, because a designated representative may take on responsibilities under the permit provisions of Title V of the Clean Air Act, the designated representative can also be subject to an enforcement action for failure to comply with certain Title V permit requirements. This paper considers the basic definition of the designated representative under EPA`s Title IV and Title V regulations, identifies the responsibilities assigned to the designated representative, and then analyzes the enforcement mechanisms that may be applied to the designated representative if a regulatory responsibility has not been satisfied.

Bischoff, C.A. [Gallagher and Kennedy, Phoenix, AZ (United States); Dayal, P. [Tucson Electric Power Co., Tucson, AZ (United States)

1995-12-31T23:59:59.000Z

420

Enhanced oil recovery for thermal processes. First amendment and extension to Annex IV  

SciTech Connect (OSTI)

This report contains the result of efforts under the several tasks of the First Amendment and Extension of Annex IV, Enhanced Oil Recovery Thermal processes. The report is presented in six sections (for each of the six tasks) and each section contains one or more reports prepared by various individuals or groups describing the results of efforts under each one of the tasks. Each section has been abstracted and processed for inclusion in the Energy Data Base. A statement of each task, taken from the agreement, is presented on the first page of each section. The tasks are numbered 8-13. The first report on Annex IV, Venezuela-MEM/USE-DOE Fossil Energy Report IV-1, (DOE/BETC/SP-83/15), contains the results from the first seven tasks. That report is dated April 1983, entitled, EOR Thermal Processes.

Peterson, G.; Schwartz, E.

1984-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Generation IV Nuclear Energy Systems Construction Cost Reductions through the Use of Virtual Environments - Task 5 Report: Generation IV Reactor Virtual Mockup Proof-of-Principle Study  

SciTech Connect (OSTI)

Task 5 report is part of a 3 year DOE NERI-sponsored effort evaluating immersive virtual reality (CAVE) technology for design review, construction planning, and maintenance planning and training for next generation nuclear power plants. Program covers development of full-scale virtual mockups generated from 3D CAD data presented in a CAVE visualization facility. Created a virtual mockup of PBMR reactor cavity and discussed applications of virtual mockup technology to improve Gen IV design review, construction planning, and maintenance planning.

Timothy Shaw; Anthony Baratta; Vaughn Whisker

2005-02-28T23:59:59.000Z

422

From DSM-IV to DSM-5 alcohol use disorder: An overview of epidemiological data  

Science Journals Connector (OSTI)

AbstractIntroduction The fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) has made several changes to criteria for alcohol use disorder (AUD). The objective of this systematic review is to assess if new DSM-5 diagnostic criteria will increase the prevalence rates of AUD in clinical and non-clinical samples as compared with DSM-IV criteria. Methods We searched PubMed, Scopus, and PsycINFO (via ProQuest) electronic databases, with no language restrictions. We included studies with data available on both DSM-IV (and DSM-IV-TR) and DSM-5 AUD in samples of adults, estimating from each study an expected increase in prevalence rates with relevant 95% confidence intervals (CIs). Results Twelve studies were included in this review. Seven studies showed an increase, two no substantial difference, and three a decrease in AUD prevalence according to DSM-5 diagnostic criteria, with differences in rates (95% CIs) varying between ? 12.4% (? 27.4 to + 5.6%) and + 61.3% (+ 46.7 to + 77.3%). Additional analyses provided confirmatory results. Conclusions DSM-5 diagnostic criteria seem to inflate prevalence rates of AUD as compared with DSM-IV. The increasing likelihood of a DSM-5 AUD diagnosis may be explained by the amount of DSM-IV ‘diagnostic orphans’ which are more prevalent than DSM-IV single-criterion alcohol abuse individuals. Further research should be aimed to study if similar trends are detectable also for other substance use disorders that experienced similar changes in DSM-5 diagnostic criteria.

Francesco Bartoli; Giuseppe Carrà; Cristina Crocamo; Massimo Clerici

2015-01-01T23:59:59.000Z

423

The preparation for and survival of an EPA Title IV and Title V facility audit  

SciTech Connect (OSTI)

As part of the 1990 Clean Air Act Amendments, major facilities are required to obtain federally enforceable operating permits (Title V). In a separate permitting action, the electric utilities with units generating more then 25 megawatts are required to obtain permits for NO{sub x} and SO{sub x}, the emissions which contribute to acid rain (Title IV). The Title IV permit is included as part of the Title V permit. This paper will use an actual audit experience at a coal fired generation facility as a case study for the preparation for and outcome of an EPA Title IV Level 3 audit. The paper will document the procedures for preparation, the audit process, and the outcome. The audit is part of the EPA's process for review of the record keeping and instrument calibration methods outlined in Title IV. Both types of permits have many different record keeping and monitoring requirements as well as separate reporting requirements which are submitted to both federal; state and local regulatory agencies for review and evaluation. Title IV units include very specific instrument calibration/audit requirements, and Title V has compliance testing and monitoring requirements. Alliant Power was notified in August 1998 of the intent of EPA Region VII to conduct a Level 3 audit at the Lansing Generation Station. The US EPA and the State of Iowa intended to review all Title IV record keeping (Level 1), continuous emission monitoring calibrations and linearity testing (Level 2) and observe the annual Relative Accuracy Testing Audit performed by an outside contractor. In addition, during this facility site visit, the compliance with Title V permit requirements was also audited.

Facca, G.L.; Faler, M.

1999-07-01T23:59:59.000Z

424

Effect of the mobility on (I-V) characteristics of the MOSFET  

SciTech Connect (OSTI)

MOSFET Transistor was the subject of many studies and research works (electronics, data-processing, telecommunications...) in order to exploit its interesting and promising characteristics. The aim of this contribution is devoted to the effect of the mobility on the static characteristics I-V of the MOSFET. The study enables us to calculate the drain current as function of bias in both linear and saturated modes; this effect is evaluated using a numerical simulation program. The influence of mobility was studied. Obtained results allow us to determine the mobility law in the MOSFET which gives optimal (I-V) characteristics of the component.

Benzaoui, Ouassila, E-mail: o-benzaoui@yahoo.fr [Technology Department, Faculty of Technology, 20 August 1955 University, BP 26, El-Hadaiek Street 21000 Skikda, Algeria and Department of Physics, Faculty of Science, Thin Films and Interfaces Laboratory, P. B 325, Ain El Bey Street, Mentouri Univers (Algeria); Azizi, Cherifa, E-mail: aziziche@yahoo.fr [Department of Material Sciences, Larbi Ben M'hidi University, BP 358, Constantine Street, 04000 Oum El-Bouaghi, Algeria and Department of Physics, Faculty of Science, Thin Films and Interfaces Laboratory, P. B 325, Ain El Bey Street, Mentouri Univers (Algeria)

2013-12-16T23:59:59.000Z

425

EIS-0402: Remediation of Area IV of the Santa Susana Field Laboratory, California  

Broader source: Energy.gov [DOE]

DOE is preparing an EIS for cleanup of Area IV, including the Energy Technology Engineering Center (ETEC), as well as the Northern Buffer Zone of the Santa Susana Field Laboratory (SSFL) in eastern Ventura County, California, approximately 29 miles north of downtown Los Angeles. (DOE’s operations bordered the Northern Buffer Zone. DOE is responsible for soil cleanup in Area IV and the Northern Buffer Zone.) In the EIS, DOE will evaluate reasonable alternatives for disposition of radiological facilities and support buildings, remediation of contaminated soil and groundwater, and disposal of all resulting waste at permitted facilities.

426

CONSTRUCTION OF WEB-ACCESSIBLE MATERIALS HANDBOOK FORGENERATION IV NUCLEAR REACTORS  

SciTech Connect (OSTI)

The development of a web-accessible materials handbook in support of the materials selection and structural design for the Generation IV nuclear reactors is being planned. Background of the reactor program is briefly introduced. Evolution of materials handbooks for nuclear reactors over years is reviewed in light of the trends brought forth by the rapid advancement in information technologies. The framework, major features, contents, and construction considerations of the web-accessible Gen IV Materials Handbook are discussed. Potential further developments and applications of the handbook are also elucidated.

Ren, Weiju [ORNL

2005-01-01T23:59:59.000Z

427

NREL Studies Wind Farm Aerodynamics to Improve Siting (Fact Sheet), The Spectrum of Clean Energy Innovation, NREL (National Renewable Energy Laboratory)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Studies Wind Farm Studies Wind Farm Aerodynamics to Improve Siting NREL researchers have used high-tech instruments and high- performance computing to understand atmospheric turbulence and turbine wake behavior in order to improve wind turbine design and siting within wind farms. The knowledge gained from this research could lead to improved turbine design standards, increased productivity in large wind farms, and a lower cost of energy from wind power. This is key, because as turbines grow in size-approximately doubling in height over the past five years-they present more complex challenges to wind turbine designers and operators. To gain new insights into turbine wind wakes, NREL and the Renewable and Sustainable Energy Institute (RASEI) joined together with the National Oceanic and Atmospheric Administration (NOAA), the

428

UMBC Policy # IV-2.20.01 Page 1 of 5 UMBC POLICY ON EXPORT CONTROL REGULATIONS  

E-Print Network [OSTI]

UMBC Policy # IV-2.20.01 Page 1 of 5 UMBC POLICY ON EXPORT CONTROL REGULATIONS UMBC IV-2.20.01 I. POLICY STATEMENT It is the policy of the University to comply with U.S. Export control regulations nationals on U.S. soil. II. PURPOSE FOR POLICY Export control regulations are a group of federal regulations

Adali, Tulay

429

Comparison between steady-state and dynamic I-V measurements from a single-cell thermionic fuel element  

SciTech Connect (OSTI)

A comparison between steady-state and dynamic I-V measurements from a single-cell thermionic fuel element (TFE) is made. The single-cell TFE used in this study is the prototype for the 40 kW{sub e} space nuclear power system that is similar to the 6 kW{sub e} TOPAZ-II. The steady-state I-V measurements influence the emitter temperature due to electron cooling. Therefore, to eliminate the steady-state I-V measurement influence on the TFE and provide a better understanding of the behavior of the thermionic energy converter and TFE characteristics, dynamic I-V measurements are made. The dynamic I-V measurements are made at various input power levels, cesium pressures, collector temperatures, and steady-state current levels. From these measurements, it is shown that the dynamic I-V's do not change the TFE characteristics at a given operating point. Also, the evaluation of the collector work function from the dynamic I-V measurements shows that the collector optimization is not due to a minimum in the collector work function but due to an emission optimization. Since the dynamic I-V measurements do not influence the TFE characteristics, it is believed that these measurements can be done at a system level to understand the influence of TFE placement in the reactor as a function of the core thermal distribution.

Wernsman, Bernard [New Mexico Engineering Research Institute Thermionics Evaluation Facility 901 University SE Albuquerque, New Mexico 87106 (United States)

1997-01-10T23:59:59.000Z

430

Multiple periodic solutions of an impulsive predator-prey model with Holling-type IV functional response  

Science Journals Connector (OSTI)

An impulsive periodic predator-prey model with Holling-type IV functional response is considered. Using the continuation theorem of coincidence degree theory, we present an easily verifiable sufficient condition on the existence of multiple periodic ... Keywords: Coincidence degree, Holling-type IV functional response, Impulse, Periodic solution, Predator-prey model

Qi Wang; Binxiang Dai; Yuming Chen

2009-05-01T23:59:59.000Z

431

IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries. Estoril, Portugal, June 26-28 2013 ABSTRACT QUESTIONNAIRE  

E-Print Network [OSTI]

IV Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries. Estoril, Portugal, June 26 Other Marketing analysis Standards and regulations #12;IV Iberian Symposium on Hydrogen, Fuel Cells PEM fuel cells X Numerical simulation SO fuel cells New materials Other fuel cells New processes

Batlle, Carles

432

CIS 677 LAB IV: Transparent Bridge To understand the transparent bridge concept.  

E-Print Network [OSTI]

CIS 677 LAB IV: Transparent Bridge 1 Goals To understand the transparent bridge concept. To implement a simpli ed transparent bridge algorithm. 2 Features of Transparent Bridges The three features of transparent bridges are: 1. The promiscuous listen and the store and forwarding capabilities. 2. Learning

Jain, Raj

433

Media Transatlantic IV March 29 31, 2012, University of Paderborn, Germany  

E-Print Network [OSTI]

Media Transatlantic IV March 29 ­ 31, 2012, University of Paderborn, Germany Traffic Aiming to bring together media scholars from the United States, Canada, and Germany, the conference continues Schabacher (University of Siegen, Germany): Traffic as 'Dirt Experience'. Harold Innis' Tracing of Media. 04

Paderborn, Universität

434

Current Topics in Investment Management 2013-14 (Code C31IV)  

E-Print Network [OSTI]

Current Topics in Investment Management 2013-14 (Code C31IV) Course Co-ordinator: Prof Andy Adams in investment management and enable them to reflect on and analyse the issues involved. Students will meet Introduction to the Course Week 2 Case Study: The Split Capital Investment Trust Crisis Week 3 Business Ethics

Painter, Kevin

435

Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report Section IV. Fuel Cells  

E-Print Network [OSTI]

W advanced PEM power plant. Approach Figure 1 provides a schematic of the gasoline fuel cell power plantHydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report 265 Section IV. Fuel Cells #12;Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report 266 #12;Hydrogen

436

Comparison of electronic structure of group IV A tetrahalides using MS-X? calculations  

Science Journals Connector (OSTI)

The charge transfer spectral properties of group IV A tetrahalides (where M=Ti, Zr or Hf and X=F, Cl, Br or I) have been calculated using the Ms-X? method and compared with experimental values. The order of li...

V Subramanian; T Ramasami

1997-10-01T23:59:59.000Z

437

Definition of the Floating System for Phase IV of OC3  

SciTech Connect (OSTI)

Phase IV of the IEA Annex XXIII Offshore Code Comparison Collaboration (OC3) involves the modeling of an offshore floating wind turbine. This report documents the specifications of the floating system, which are needed by the OC3 participants for building aero-hydro-servo-elastic models.

Jonkman, J.

2010-05-01T23:59:59.000Z

438

Hydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report IV.E Air Management Subsystems  

E-Print Network [OSTI]

the motor driven compressor/expander and evaluated performance, weight and cost projection data. As comparedHydrogen, Fuel Cells, and Infrastructure Technologies FY 2002 Progress Report 490 IV.E Air and by improving upon previous project results. · Reduce turbocompressor/motor controller costs while increasing

439

Comparison between steady-state and dynamic I-V measurements from a single-cell thermionic fuel element  

SciTech Connect (OSTI)

A comparison between steady-state and dynamic I-V measurements from a single-cell thermionic fuel element (TFE) is made. The single-cell TFE used in this study is the prototype for the 40kW{sub e} space nuclear power system that is similar to the 6kW{sub e} TOPAZ-II. The steady-state I-V measurements influence the emitter temperature due to electron cooling. Therefore, to eliminate the steady-state I-V measurement influence on the TFE and provide a better understanding of the behavior of the thermionic energy converter and TFE characteristics, dynamic I-V measurements are made. The dynamic I-V measurements are made at various input power levels, cesium pressures, collector temperatures, and steady-state current levels. From these measurements, it is shown that the dynamic I-V{close_quote}s do not change the TFE characteristics at a given operating point. Also, the evaluation of the collector work function from the dynamic I-V measurements shows that the collector optimization is not due to a minimum in the collector work function but due to an emission optimization. Since the dynamic I-V measurements do not influence the TFE characteristics, it is believed that these measurements can be done at a system level to understand the influence of TFE placement in the reactor as a function of the core thermal distribution. {copyright} {ital 1997 American Institute of Physics.}

Wernsman, B. [New Mexico Engineering Research Institute Thermionics Evaluation Facility 901 University SE Albuquerque, New Mexico87106 (United States)

1997-01-01T23:59:59.000Z

440

Making appropriate comparisons of estimated and actual costs of reducing SO{sub 2} emissions under Title IV  

SciTech Connect (OSTI)

A current sentiment within some parts of the environmental policy community is that market-based regulatory approaches such as emissions trading have proven so effective that actual costs will be only a small fraction of what ex ante cost estimation procedures would project. With this line of reasoning, some have dismissed available cost estimates for major proposed new regulations, such as the new PM and ozone NAAQS, as not meaningful for policy decisions. The most commonly used evidence in support of this position is the experience with SO{sub 2} reductions under Title IV of the 1990 Clean Air Act Amendments. In Title IV, a market for emissions allowances has been used to achieve reductions in sulfur dioxides (SO{sub 2}) to ameliorate acid rain. It is commonly asserted today that the cost of achieving the SO{sub 2} emissions reductions has been only one-tenth or less of what Title IV was originally expected to cost. This paper demonstrates that, to the contrary, actual costs for SO{sub 2} reductions remain roughly in line with original estimates associated with Title IV. Erroneous conclusions about Title IV`s costs are due to inappropriate comparisons of a variety of different measures that appear to be comparable only because they are all stated in dollars per ton. Program cost estimates include the total costs of a fully-implemented regulatory program. The very low costs of Title IV that are commonly cited today are neither directly reflective of a fully implemented Title IV, (which is still many years away) nor reflective of all the costs already incurred. Further, a careful review of history finds that the initial cost estimates that many cite were never associated with Title IV. Technically speaking, people are comparing the estimated control costs for the most-costly power plant associated with earlier acid rain regulatory proposals with prices from a market that do not directly reflect total costs.

Smith, A.E. [DFI/Aeronomics Inc., Washington, DC (United States)

1998-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Suirr 300, 955 L*Enfwu Plaza. S. Iv.. Washingron. D.C. 200242174.  

Office of Legacy Management (LM)

Suirr 300, 955 L*Enfwu Plaza. S. Iv.. Washingron. D.C. 200242174. Suirr 300, 955 L*Enfwu Plaza. S. Iv.. Washingron. D.C. 200242174. 7117-03.87.cdy.43 23 September 1987 M r. Andrew Wallo, III, NE-23 Division of Facility & Site Decommissioning Projects U.S. Department of Energy Germantown, Maryland 20545 Dear M r. Wallo: I ELIMINATION~RECOMMENDATION -- COLLEGES AND "NIY$RfITIES / t kphonc (202) d.t%xO The attached elimination recommendation was prepared lin accordance with your suggestion during our meeting on 22 September! The recommenda includes 26 colleges and universities identified.in Enclosure 4 to Aerospace letter subject: Status of Actions - FUSRAP Site' List, dated 27 May 1987; three institutions (Tufts College. University of Virginia, and the University of Washington) currently identified on phe FUSRAP

442

Microsoft PowerPoint - Roberts, IV and Stewardship (SSAB April 2010).ppt [Compatibility Mode]  

Broader source: Energy.gov (indexed) [DOE]

Independent Independent Verification and Independent Verification and Stewardship April 29, 2010 Sarah Roberts, CHP Acting Program Director, ORISE IEAV Benefits of IV "IV is an important quality assurance step that ensures cleanup goals have been achieved" (DOE Lessons Learned from Independent have been achieved (DOE Lessons Learned from Independent Verification Activities, July 2008) * Offers a cost-effective way to provide assurance that the site was successfully remediated to the risk-based release criteria was successfully remediated to the risk based release criteria * Enhances public credibility and builds stakeholder trust in environmental cleanup * Provides consistency among multiple D&D projects at a particular site * Ensures D&D plans and reports are technically sound

443

DEVELOPMENT OF A METHODOLOGY TO ASSESS PROLIFERATION RESISTANCE AND PHYSICAL PROTECTION FOR GENERATION IV SYSTEMS  

SciTech Connect (OSTI)

Enhanced proliferation resistance and physical protection (PR&PP) is one of the technology goals for advanced nuclear concepts, such as Generation IV systems. Under the auspices of the Generation IV International Forum, the Office of Nuclear Energy, Science and Technology of the U.S. DOE, the Office of Nonproliferation Policy of the National Nuclear Security Administration, and participating organizations from six other countries are sponsoring an international working group to develop an evaluation methodology for PR&PP. This methodology will permit an objective PR&PP comparison between alternative nuclear systems (e.g., different reactor types or fuel cycles) and support design optimization to enhance robustness against proliferation, theft and sabotage. The paper summarizes the proposed assessment methodology including the assessment framework, measures used to express the PR&PP characteristics of the system, threat definition, system element and target identification, pathway identification and analysis, and estimation of the measures.

Nishimura, R.; Bari, R.; Peterson, P.; Roglans-Ribas, J.; Kalenchuk, D.

2004-10-06T23:59:59.000Z

444

New method of parameters extraction from dark I-V curve  

SciTech Connect (OSTI)

It is very necessary, for solar cells, to obtain a low series resistance and to be able to determine it with accuracy because it is an important parameter of fill factor and efficiency improvement. In the case of low series resistance, the authors have developed a new method of parameters extraction from only one dark I-V characteristic. They have also improved another technique (the integral) of series resistance extraction. They have compared these two methods to two other ones (the derivative and Lee et al. method). The method gives very good results. Moreover, it is very simple to use and presents the advantage of being independent of the voltage step in contrary to the derivative and to the integral. They have then applied their technique to a whole solar cell I-V curve and the results are very good.

Kaminski, A.; Marchand, J.J.; Fave, A.; Laugier, A. [INSA de Lyon, Villeurbanne (France). Lab. de Physique de la Matiere

1997-12-31T23:59:59.000Z

445

Heteroepitaxy of group IV-VI nitrides by atomic layer deposition  

SciTech Connect (OSTI)

Heteroepitaxial growth of selected group IV-VI nitrides on various orientations of sapphire (?-Al{sub 2}O{sub 3}) is demonstrated using atomic layer deposition. High quality, epitaxial films are produced at significantly lower temperatures than required by conventional deposition methods. Characterization of electrical and superconducting properties of epitaxial films reveals a reduced room temperature resistivity and increased residual resistance ratio for films deposited on sapphire compared to polycrystalline samples deposited concurrently on fused quartz substrates.

Klug, Jeffrey A., E-mail: jklug@anl.gov; Groll, Nickolas R.; Pellin, Michael J.; Proslier, Thomas, E-mail: prolier@anl.gov [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)] [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Becker, Nicholas G.; Cao, Chaoyue; Zasadzinski, John F. [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616 (United States); Weimer, Matthew S. [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States) [Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616 (United States)

2013-11-18T23:59:59.000Z

446

EIS-0469: Proposed Wilton IV Wind Energy Center Project, Burleigh County, North Dakota  

Broader source: Energy.gov [DOE]

Western Area Power Administration is evaluating the potential environmental impacts of interconnecting NextEra Energy Resources proposed Wilton IV Wind Energy Center Project, near Bismarck, North Dakota, to Western’s existing Wilton/Baldwin substation and allowing NextEra’s existing wind projects in this area to operate above 50 annual MW. Western is preparing a Supplemental Draft EIS to address substantial changes to the proposal, including 30 turbine locations and 5 alternate turbine locations in Crofte Township.

447

XAS Characterization of a Nitridoiron(IV) Complex with a Very Short Fe-N Bond  

SciTech Connect (OSTI)

X-ray absorption spectroscopy has been used to characterize the novel nitridoiron(IV) units in two [PhBP{sup R}{sub 3}]Fe(N) complexes (R = iPr and CyCH{sub 2}) and obtain direct spectroscopic evidence for a very short Fe-N distance. The distance of 1.51-1.55 {angstrom} reflects the presence of an Fe{triple_bond}N triple bond in accord with the observed Fe{triple_bond}N vibration observed for one of these species ({nu}{sub FeN} = 1034 cm{sup -1}). This highly covalent bonding interaction results in the appearance of an unusually intense pre-edge peak, whose estimated area of 100(20) units is much larger than those of the related tetrahedral complexes with Fe{sup I}-N{sub 2}-Fe{sup I}, Fe{sup II}-NPh{sub 2}, and Fe{sup III}NAd motifs, and those of recently described six-coordinate Fe{sup V}{triple_bond}N and Fe{sup VI}{triple_bond}N complexes. The observation that the Fe{sup IV}-N distances of two [PhBP{sup R}{sub 3}]Fe(N) complexes are shorter than the Fe{sup IV}-O bond lengths of oxoiron(IV) complexes may be rationalized on the basis of the greater {pi} basicity of the nitrido ligand than the oxo ligand and a lower metal coordination number for the Fe(N) complex.

Rohde,J.; Betley, T.; Jackson, T.; Saouma, C.; Peters, J.; Que, Jr., L.

2007-01-01T23:59:59.000Z

448

XAS Characterization of a Nitridoiron(IV) Complex With a Very Short Fe-N Bond  

SciTech Connect (OSTI)

X-ray absorption spectroscopy has been used to characterize the novel nitridoiron(IV) units in two [PhBP{sup R}{sub 3}]Fe(N) complexes (R = iPr and CyCH{sub 2}) and obtain direct spectroscopic evidence for a very short Fe-N distance. The distance of 1.51--1.55 {angstrom} reflects the presence of an Fe{triple_bond}N triple bond in accord with the observed Fe{triple_bond}N vibration observed for one of these species (v{sub FeN}=1034 cm{sup -1}). This highly covalent bonding interaction results in the appearance of an unusually intense pre-edge peak, whose estimated area of 100(20) units is much larger than those of the related tetrahedral complexes with Fe{sup I}-N{sub 2}-Fe{sup I}, Fe{sup II}-NPh{sub 2}, and Fe{sup III}{triple_bond}NAd motifs, and those of recently described six-coordinate Fe{sup V}{triple_bond}N and Fe{sup VI}{triple_bond}N complexes. The observation that the Fe{sup IV}-N distances of two [PhBP{sup R}{sub 3}]Fe(N) complexes are shorter than the Fe{sup IV}-O bond lengths of oxoiron(IV) complexes may be rationalized on the basis of the greater ? basicity of the nitrido ligand than the oxo ligand and a lower metal coordination number for the Fe(N) complex.

Rohde, J.-U.; Betley, T.A.; Jackson, T.A.; Saouma, C.T.; Peters, J.C.; Que, L.; Jr.

2009-06-04T23:59:59.000Z

449

GEN IV MATERIALS HANDBOOK BETA RELEASE FOR STRUCTURAL AND FUNCTIONAL EVALUATION  

SciTech Connect (OSTI)

Development of the Gen IV Materials Handbook is briefly summarized up to date. Current status of the Handbook website construction is described. The developed Handbook components and access control of the beta version are discussed for the present evaluation release. Detailed instructions and examples are given to provide guidance for evaluators to browse the constructed parts and use all the currently developed functionalities of the Handbook in evaluation.

Ren, Weiju [ORNL] [ORNL; Luttrell, Claire [ORNL] [ORNL

2006-09-12T23:59:59.000Z

450

Theoretical Physics IV -SS 2007 -R. Flume to hand in April 24th -30th, 2007  

E-Print Network [OSTI]

Theoretical Physics IV - SS 2007 - R. Flume Exercise I to hand in April 24th - 30th, 2007 potential of the i-th component as µi ( U Ni )S,V,N1,..,cNi,..,Nr . The equations of state are T = T(S, VAU/N . What is the corresponding fundamental equation? Hint: To integrate, let s = Dun vm e-Au where D, n

Buse, Karsten

451

Mejora docente y adaptacin al Espacio Europeo de Educacin Superior Tabla IV. Hitos Futuros  

E-Print Network [OSTI]

Mejora docente y adaptación al Espacio Europeo de Educación Superior Tabla IV. Hitos Futuros Hito Ámbito Descripción Fecha Esperada Medio de verificación 1. Mejora docente y adaptación al EEES Creación y CQUID 2. Mejora docente y adaptación al EEES Consolidación del observatorio UPF de buenas prácticas

Geffner, Hector

452

Producing Early-Maturity (Group IV) Soybeans on the Texas Gulf Coast  

E-Print Network [OSTI]

, to date, have commanded good prices in oil, feed, and export markets. Soybean acreage has increased in Victoria, Calhoun, Jackson, and Matagorda counties because of the crop?s low input costs. Selection: Adaption and Maturity Primarily Group IV and very... and Extension Specialists, Agronomy, The Texas A&M University System. Texas AgriLife Extension Service ? Zerle L. Carpenter, Director ? The Texas A&M University System ? College Station, Texas ARANSAS VICTORIA GOLIAD REFUGIO KARNES DE WITT LAVACA JACKSON MATA...

Klosterboer, Arlen; Miller, Travis; Livingston, Stephen

1996-04-11T23:59:59.000Z

453

Reductive Dissolution of Pu(IV) by Clostridium sp. Under Anaerobic Conditions  

Science Journals Connector (OSTI)

238,239,240Pu (gross alpha activity 1.7 × 105?pCi/L) isotopes were detected in leachate samples collected from the low-level radioactive-waste disposal sites at West Valley, NY and Maxey Flats, KY (3-5). ... Pu in trench leachates at the Maxey Flats radioactive waste disposal site exists as dissolved species, primarily Pu(IV) complexes with strong org. ... The SIT is used for ionic strength corrections. ...

Arokiasamy J. Francis; Cleveland J. Dodge; Jeffrey B. Gillow

2008-02-26T23:59:59.000Z

454

Solvent Extraction Behavior of Neptunium (IV) Ions between Nitric Acid and Diluted 30% Tri-butyl Phosphate in the Presence of Simple Hydroxamic Acids  

SciTech Connect (OSTI)

Formo- and aceto-hydroxamic acids are very effective reagents for stripping tetravalent actinide ions such as Np(IV) and Pu(IV) ions from a tri-butyl phosphate phase into nitric acid. Distribution data for Np(IV) in the presence of these hydroxamate ions have now been accumulated and trends established. Stability constants for aceto-hydroxamate complexes of Np(IV) and Np(V) ions have also been determined in a perchlorate medium, and these reaffirm the affinity of hydroxamate ligands for actinide (IV) ions over actinyl (V,VI) ions.

Taylor, Robin J.; Sinkov, Sergey I.; Choppin, Gregory R.; May, Iain

2008-01-15T23:59:59.000Z

455

Longitudinal diagnostic efficiency of DSM-IV criteria for obsessive–compulsive personality disorder: a 2-year prospective study.  

E-Print Network [OSTI]

??Objective: To examine the longitudinal diagnostic efficiency of the DSM-IV criteria for obsessive–compulsive personality disorder (OCPD). Method: At baseline, criteria and diagnoses were determined using… (more)

Grilo, Carlos M.

2004-01-01T23:59:59.000Z

456

A century of controversy surrounding posttraumatic stress-spectrum syndromes: The impact on DSM-III and DSM-IV  

Science Journals Connector (OSTI)

The authors describe historical clinical reports that preceded the development of criteria for posttraumatic stress disorder (PTSD) and influenced the formation of PTSD in DSM-IV. These reports were identified fr...

J. David Kinzie; Rupert R. Goetz

1996-04-01T23:59:59.000Z

457

The type IV pilin, PilA, is required for full virulence of Francisella tularensis subspecies tularensis  

Science Journals Connector (OSTI)

All four Francisella tularensis subspecies possess gene clusters with potential to express type IV pili (Tfp). These clusters include putative pilin genes, as well as pilB, pilC and pilQ, required for secretion a...

Anna-Lena Forslund; Emelie Näslund Salomonsson; Igor Golovliov…

2010-08-01T23:59:59.000Z

458

Extraction of uranium(VI) and plutonium(IV) with dihexylbutyramide and dihexylisobutyramide from nitric acid medium  

Science Journals Connector (OSTI)

The extraction of uranium(VI) and plutonium(IV) was carried out with two isomeric monoamides, dihexylbutyramide (DHBA) and dihexylisobutyramide (DHIBA) from nitric acid medium, usingn-dodecane as diluent. The pos...

G. M. Nair; D. R. Prabhu; G. R. Mahajan

1994-08-01T23:59:59.000Z

459

The Path of Carbon in Photosynthesis IV. The Identity and Sequence fo the Intermediates in Sucrose Synthesis  

E-Print Network [OSTI]

B&TH OF CARBON IN PHOTOSYNTHESIS IV. THE IDENTITY Alii'])eigl, AMS Monograph on Photosynthesis, .in press. UCRL-254in a 9O-second photosynthesis, an activity of 30,000 cpm is

Calvin, M.; Benson, A.

2008-01-01T23:59:59.000Z

460

Aerodynamics and Heat Transfer Studies of Parameters Specific to the IGCC-Requirements: Endwall Contouring, Leading Edge and Blade Tip Ejection under Rotating Turbine Conditions  

SciTech Connect (OSTI)

This report deals with the specific aerodynamics and heat transfer problematic inherent to high pressure (HP) turbine sections of IGCC-gas turbines. Issues of primary relevance to a turbine stage operating in an IGCC-environment are: (1) decreasing the strength of the secondary flow vortices at the hub and tip regions to reduce (a), the secondary flow losses and (b), the potential for end wall deposition, erosion and corrosion due to secondary flow driven migration of gas flow particles to the hub and tip regions, (2) providing a robust film cooling technology at the hub and that sustains high cooling effectiveness less sensitive to deposition, (3) investigating the impact of blade tip geometry on film cooling effectiveness. The document includes numerical and experimental investigations of above issues. The experimental investigations were performed in the three-stage multi-purpose turbine research facility at the Turbomachinery Performance and Flow Research Laboratory (TPFL), Texas A&M University. For the numerical investigations a commercial Navier-Stokes solver was utilized.

Schobeiri, Meinhard; Han, Je-Chin

2014-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Generation IV Nuclear Energy Systems Construction Cost Reductions through the Use of Virtual Environments - Final Report  

SciTech Connect (OSTI)

Final report of 3 year DOE NERI-sponsored effort evaluating immersive virtual reality (CAVE) technology for design review, construction planning, and maintenance planning and training for next generation nuclear power plants. Program covers development of full-scale virtual mockups generated from 3D CAD data presented in a CAVE visualization facility. Mockups applied to design review of AP600/1000, Construction planning for AP 600, and AP 1000 maintenance evaluation. Proof of concept study also performed for GenIV PBMR models.

Timothy Shaw; Anthony Baratta; Vaughn Whisker

2005-02-28T23:59:59.000Z

462

Generic process for preparing a crystalline oxide upon a group IV semiconductor substrate  

DOE Patents [OSTI]

A process for growing a crystalline oxide epitaxially upon the surface of a Group IV semiconductor, as well as a structure constructed by the process, is described. The semiconductor can be germanium or silicon, and the crystalline oxide can generally be represented by the formula (AO).sub.n (A'BO.sub.3).sub.m in which "n" and "m" are non-negative integer repeats of planes of the alkaline earth oxides or the alkaline earth-containing perovskite oxides. With atomic level control of interfacial thermodynamics in a multicomponent semiconductor/oxide system, a highly perfect interface between a semiconductor and a crystalline oxide can be obtained.

McKee, Rodney A. (Kingston, TN); Walker, Frederick J. (Oak Ridge, TN); Chisholm, Matthew F. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

463

THE ENIGMATIC PAIR OF DWARF GALAXIES LEO IV AND LEO V: COINCIDENCE OR COMMON ORIGIN?  

SciTech Connect (OSTI)

We have obtained deep photometry in two 1{sup 0} x 1{sup 0} fields covering the close pair of dwarf spheroidal galaxies Leo IV and Leo V and part of the area in between. From the distribution of likely red giant branch (RGB) and horizontal-branch (HB) stars in the data set, we find that both Leo IV and Leo V are significantly larger than indicated by previous measurements based on shallower data. With a half-light radius of r{sub h} = 4.'6 +- 0.'8 (206 +- 36 pc) and r{sub h} = 2.'6 +- 0.'6 (133 +- 31 pc), respectively, both systems are now well within the physical size bracket of typical dwarf spheroidal Milky Way satellites. Both are also found to be significantly elongated with an ellipticity of epsilon {approx_equal} 0.5, a characteristic shared by many of the fainter (M{sub V} > - 8) Milky Way dwarf spheroidals. The large spatial extent of our survey allows us to search for extra-tidal features in the area between the two dwarf galaxies with unprecedented sensitivity. The spatial distribution of candidate RGB and HB stars in this region is found to be non-uniform at the {approx}3sigma level. Interestingly, this substructure is aligned along the direction connecting the two systems, indicative of a possible 'bridge' of extra-tidal material. Fitting the stellar distribution with a linear Gaussian model yields a significance of 4sigma for this overdensity, a most likely FWHM of {approx}16 arcmin, and a central surface brightness of {approx_equal}32 mag arcsec{sup -2}. We investigate different scenarios to explain the close proximity of Leo IV and Leo V, and the possible tidal bridge between them. Orbit calculations demonstrate that the two systems cannot share the exact same orbit, while a compromise orbit does not approach the Galactic center more than {approx}160 kpc, rendering it unlikely that they are remnants of a single disrupted progenitor. A comparison with cosmological simulations shows that a chance collision between unrelated subhalos is negligibly small. Given their relative distance and velocity, Leo IV and Leo V could be a bound 'tumbling pair', if their combined mass exceeds (8 +- 4) x 10{sup 9} M{sub sun}. The scenario of an internally interacting pair that fell into the Milky Way together appears to be the most viable explanation for this close celestial companionship.

De Jong, Jelte T. A.; Martin, Nicolas F.; Rix, Hans-Walter; Smith, Kester W.; Maccio, Andrea V. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany); Jin, Shoko, E-mail: dejong@mpia.d [Astronomisches Rechen-Institut, Zentrum fuer Astronomie der Universitaet Heidelberg, Moenchhofstrasse 12-14, D-69120 Heidelberg (Germany)

2010-02-20T23:59:59.000Z

464

Prospective study evaluating the use of IV contrast on IMRT treatment planning for lung cancer  

SciTech Connect (OSTI)

Purpose: To investigate the impact of exclusively using intravenous (IV) contrast x-ray computed tomography (CT) scans on lung cancer intensity-modulated radiation therapy (IMRT) treatment planning. Methods: Eight patients with lung cancer (one small cell, seven nonsmall cell) scheduled to receive IMRT consented to acquisition of simulation CT scans with and without IV contrast. Clinical treatment plans optimized on the noncontrast scans were recomputed on contrast scans and dose coverage was compared, along with the ? passing rates. Results: IV contrast enhanced scans provided better target and critical structure conspicuity than the noncontrast scans. Using noncontrast scan as a reference, the median absolute/relative differences in mean, maximum, and minimum doses to the planning target volume (PTV) were ?4.5 cGy/?0.09%, 41.1 cGy/0.62%, and ?19.7 cGy/?0.50%, respectively. Regarding organs-at-risk (OARs), the median absolute/relative differences of maximum dose to heart was ?13.3 cGy/?0.32%, to esophagus was ?63.4 cGy/?0.89%, and to spinal cord was ?16.3 cGy/?0.46%. The median heart region of interest CT Hounsfield Unit (HU) number difference between noncontrast and contrast scans was 136.4 HU (range, 94.2–161.8 HU). Subjectively, the regions with absolute dose differences greater than 3% of the prescription dose were small and typically located at the patient periphery and/or at the beam edges. The median ? passing rate was 0.9981 (range, 0.9654–0.9999) using 3% absolute dose difference/3 mm distance-to-agreement criteria. Overall, all evaluated cases were found to be clinically equivalent. Conclusions: PTV and OARs dose differences between noncontrast and contrast scans appear to be minimal for lung cancer patients undergoing IMRT. Using IV contrast scans as the primary simulation dataset could increase treatment planning efficiency and accuracy by avoiding unnecessary scans, manually region overriding, and planning errors caused by nonperfect image registrations.

Li, Hua, E-mail: huli@radonc.wustl.edu; Bottani, Beth; DeWees, Todd; Michalski, Jeff M.; Mutic, Sasa; Bradley, Jeffrey D.; Robinson, Clifford G. [Department of Radiation Oncology, Washington University School of Medicine, Saint Louis, Missouri 63110 (United States)] [Department of Radiation Oncology, Washington University School of Medicine, Saint Louis, Missouri 63110 (United States); Low, Daniel A. [Department of Radiation Oncology, University of California Los Angeles, Los Angeles, California 90095 (United States)] [Department of Radiation Oncology, University of California Los Angeles, Los Angeles, California 90095 (United States)

2014-03-15T23:59:59.000Z

465

Distribution Behavior of U(VI), Pu(IV), Am(III), and Zr(IV) with N,N-Dihexyl Octanamide Under Uranium-Loading Conditions  

SciTech Connect (OSTI)

While the tri-n-butyl phosphate (TBP)-based PUREX process has been the workhorse of the nuclear fuel reprocessing industry for the last four and a half decades, a few drawbacks associated with the use of TBP have caused concern to the separation scientists and technologists. These shortcomings may pose a serious challenge particularly during the reprocessing of (a) short cooled thermal reactor fuels, (b) fast reactor fuels with the larger Pu content and significantly higher burn up, and (c) while treating various waste streams for their disposal to the environment. The N,N-dialkyl aliphatic amides have received particular attention as alternate potential extractants for the reprocessing of spent nuclear fuels in view of (a) the innocuous nature of their degradation products, namely, carboxylic acids/amines and (b) the possibility to incinerate the used solvent leading to reduced volume of secondary waste. The physical and chemical properties of these amides are influenced strongly by the nature of alkyl groups. The extractant N,N-dihexyl octanamide (DHOA) was found to be a promising candidate among a large number of extractants studied. Laboratory batch studies as well as mixer settler studies were performed under process conditions with DHOA and compared with those of TBP. DHOA was found to extract Pu(IV) more efficiently than TBP, both at trace-level concentration as well as under uranium loading conditions. In addition, the extraction behavior of Am(III) and Zr(IV) was studied at varying nitric acid concentrations (1 to 6 M). Extraction behavior of uranium at macroconcentrations (9.9 to 157.7 g/l) was carried out at different temperatures, and it was observed that D{sub U} decreased with the increase in U loading as well as with the increase of temperature (in the range 25 to 45 deg. C) and that the two-phase reaction was exothermic in nature. Mixer settler studies on U(VI) revealed that DHOA is similar to TBP during the extraction cycle but better than TBP during the stripping cycle.

Manchanda, V.K.; Ruikar, P.B.; Sriram, S.; Nagar, M.S.; Pathak, P.N.; Gupta, K.K.; Singh, R.K.; Chitnis, R.R.; Dhami, P.S.; Ramanujam, A. [Bhabha Atomic Research Centre (India)

2001-06-15T23:59:59.000Z

466

Comparison of BWR-stability measurements with calculations using the code LAPUR-IV  

SciTech Connect (OSTI)

A parametric study of stability characteristics in boiling water reactors (BWRs) was performed using the frequency domain code LAPUR-IV. Two different reactors, Peach Bottom Unit 2 and Vermont Yankee, were considered in a total of 17 different operating conditions that corresponded to three series of low-flow stability tests performed in these two reactors. Stability margins, in terms of decay ratio and natural frequency of the closed loop reactivity-to-power transfer function (T.F.), were calculated and then compared with the experimental results. In addition, a sensitivity analysis was performed to determine the changes in calculated results to be expected in response to alterations in the density reactivity coefficient (DRC), the recirculation loop pressure-to-flow T.F. parameters, and the fuel-to-cladding-gap heat conductance. This allows assessment of the effect of input data uncertainty on the calculated results. Satisfactory agreement was found between the stability margins calculated using LAPUR-IV and the experimental results. The sensitivity analysis shows that the DRC is the most critical of the parameters investigated for accurate stability calculations.

March-Leuba, J.; Otaduy, P.J.

1983-01-01T23:59:59.000Z

467

Status of advanced fuel candidates for Sodium Fast Reactor within the Generation IV International Forum  

SciTech Connect (OSTI)

The main challenge for fuels for future Sodium Fast Reactor systems is the development and qualification of a nuclear fuel sub-assembly which meets the Generation IV International Forum goals. The Advanced Fuel project investigates high burn-up minor actinide bearing fuels as well as claddings and wrappers to withstand high neutron doses and temperatures. The R&D outcome of national and collaborative programs has been collected and shared between the AF project members in order to review the capability of sub-assembly material and fuel candidates, to identify the issues and select the viable options. Based on historical experience and knowledge, both oxide and metal fuels emerge as primary options to meet the performance and the reliability goals of Generation IV SFR systems. There is a significant positive experience on carbide fuels but major issues remain to be overcome: strong in-pile swelling, atmosphere required for fabrication as well as Pu and Am losses. The irradiation performance database for nitride fuels is limited with longer term R&D activities still required. The promising core material candidates are Ferritic/Martensitic (F/M) and Oxide Dispersed Strengthened (ODS) steels.

F. Delage; J. Carmack; C. B. Lee; T. Mizuno; M. Pelletier; J. Somers

2013-10-01T23:59:59.000Z

468

Evaluation of copper for divider subassembly in MCO Mark IA and Mark IV scrap fuel baskets  

SciTech Connect (OSTI)

The K Basin Spent Nuclear Fuel (SNF) Project Multi-Canister Overpack (MCO) subprojection eludes the design and fabrication of a canister that will be used to confine, contain, and maintain fuel in a critically safe array to enable its removal from the K Basins, vacuum drying, transport, staging, hot conditioning, and interim storage (Goldinann 1997). Each MCO consists of a shell, shield plug, fuel baskets (Mark IA or Mark IV), and other incidental equipment. The Mark IA intact and scrap fuel baskets are a safety class item for criticality control and components necessary for criticality control will be constructed from 304L stainless steel. It is proposed that a copper divider subassembly be used in both Mark IA and Mark IV scrap baskets to increase the safety basis margin during cold vacuum drying. The use of copper would increase the heat conducted away from hot areas in the baskets out to the wall of the MCO by both radiative and conductive heat transfer means. Thus copper subassembly will likely be a safety significant component of the scrap fuel baskets. This report examines the structural, cost and corrosion consequences associated with using a copper subassembly in the stainless steel MCO scrap fuel baskets.

Graves, C.E.

1997-09-29T23:59:59.000Z

469

EXPERIMENTAL OBSERVATIONS ON THE ROLES OF CADMIUM POOL IN MARK-IV ELECTROREFINER  

SciTech Connect (OSTI)

Idaho National Laboratory and Argonne National Laboratory have developed and demonstrated a pyroprocessing technology for the Department of Energy to reprocess spent nuclear fuel. One of the key steps in the pyroprocessing was electrorefining the spent fuel in a metal form in a molten LiCl-KCl-UCl3/liquid cadmium system using an engineering scale electrorefiner (Mark-IV ER). This article summarizes experimental observations and engineering aspects for the roles of the liquid cadmium for electrorefining of the spent fuel in the Mark-IV ER. It was found that the liquid cadmium pool acted as an intermediate electrode during the electrorefining process. The cadmium level gradually decreased due to its high vapor pressure at the ER operating temperature. The low cadmium level caused the anode assembly to electrically short with the ER vessel hardware, which resulted in difficulty determining the endpoint of uranium dissolution from the anode baskets and reducing the current efficiency. A reflux cadmium vapor trap has successfully prevented the cadmium level from decreasing and mitigated cadmium vapor deposition on cold metal surface inside the ER.

SHELLY X. LI

2008-05-01T23:59:59.000Z

470

Supporting technology for enhanced oil recovery: Third ammendment and extension to Annex IV enhanced oil recovery thermal processes  

SciTech Connect (OSTI)

This report contains the results of efforts under the seven tasks of the Third Amendment and Extension of Annex IV, Enhanced Oil Recovery Thermal Processes of the Venezuela/USA Agreement. The report is presented in sections (for each of the tasks) and each section contains one or more reports prepared by various individuals or groups describing the results of effort under each of the tasks. A statement of each task, taken from the agreement, is presented on the first page of each section. The tasks are numbered 25 through 31. The first, second, and third reports on Annex IV, ((Venezuela-MEM/USA-DOE Fossil Energy Report IV-1, IV-2, and IV-3 (DOE/BETC/SP-83/15, DOE/BC-84/6/SP, and DOE/BC-86/2/SP)) contain the results from the first 24 tasks. Those reports are dated April 1983, August 1984, and March 1986. Selected papers have been processed for inclusion in the Energy Data Base.

Peterson, G.; Munoz, J.D.

1987-07-01T23:59:59.000Z

471

A Project Management and Systems Engineering Structure for a Generation IV Very High Temperature Reactor  

SciTech Connect (OSTI)

The Very High Temperature Reactor (VHTR) will be an advanced, very high temperature (approximately 1000o C. coolant outlet temperature), gas cooled nuclear reactor and is the nearest term of six Generation IV reactor technologies for nuclear assisted hydrogen production. In 2001, the Generation IV International Forum (GIF), a ten nation international forum working together with the Department of Energy’s (DOE) Nuclear Energy Research Advisory Committee (NERAC), agreed to proceed with the development of a technology roadmap and identified the next generation of nuclear reactor systems for producing new sources of power. Since a new reactor has not been licensed in the United States since the 1970s, the risks are too large for a single utility to assume in the development of an unprecedented Generation IV reactor. The government must sponsor and invest in the research to resolve major first of a kind (FOAK) issues through a full-scale demonstration prior to industry implementation. DOE’s primary mission for the VHTR is to demonstrate nuclear reactor assisted cogeneration of electricity and hydrogen while meeting the Generation IV goals for safety, sustainability, proliferation resistance and physical security and economics. The successful deployment of the VHTR as a demonstration project will aid in restarting the now atrophied U.S. nuclear power industry infrastructure. It is envisioned that VHTR project participants will include DOE Laboratories, industry partners such as designers, constructors, manufacturers, utilities, and Generation IV international countries. To effectively mange R&D, engineering, procurement, construction, and operation for this multi-organizational and technologically complex project, systems engineering will be used extensively to ensure delivery of the final product. Although the VHTR is an unprecedented FOAK system, the R&D, when assessed using the Office of Science and Technology Gate Model, falls primarily in the 3rd - Exploratory Development, 4th – Advanced Development, and 5th- Engineering Development stages of maturity rather than in the basic and viability stages. Therefore the R&D must be controlled and project driven from the top down to address specific issues of feasibility, proof of design or support of engineering. The design evolution must be through the systems approach including an iterative process of high-level requirements definition, engineering to focus R&D to verify feasibility, requirements development and conceptual design, R&D to verify design and refine detailed requirements for final detailed design. This paper will define a framework for project management and application of systems engineering at the Idaho National Engineering and Environmental Laboratory (INEEL). The VHTR Project includes an overall reactor design and construction activity and four major supporting activities: fuel development and qualification, materials selection and qualification, NRC licensing and regulatory support, and the hydrogen production plant.

Ed Gorski; Dennis Harrell; Finis Southworth

2004-09-01T23:59:59.000Z

472

Conserved structural chemistry for incision activity in structurally non-homologous apurinic/apyrimidinic endonuclease APE1 and endonuclease IV DNA repair enzymes.  

E-Print Network [OSTI]

specificity for DNA repair enzyme superfamily. Nat StructIV. Characterization of an enzyme that recognizes oxidativemultifunctional DNA-repair enzyme exonuclease III. Nature

Tsutakawa, Susan E.

2014-01-01T23:59:59.000Z

473

Effect of temperature on the extraction of nitric acid and plutonium(IV) nitrate with 30 vol% tributyl phosphate (TBP)  

SciTech Connect (OSTI)

The author's own and published data were evaluated for characterizing the effect of temperature on the distribution of nitric acid and plutonium(IV). The solutes were distributed between 30 vol% TBP in an aliphatic diluent and aqueous solutions containing nitric acid and zero to macro amounts of plutonium(IV) and uranyl nitrates. The temperature dependence of the distribution ratios is described with empirical model equations and examples of the dependence in the absence and presence of uranium(VI) are given. Taking infinite dilution of all solutes of the system as a standard state, the enthalpy change of the extraction reaction could be estimated as -17 kJ/mol for nitric acid, but no numerical estimate was possible for plutonium(IV).

Kolarik, Z.

1984-01-01T23:59:59.000Z

474

Shipment and Disposal of Solidified Organic Waste (Waste Type IV) to the Waste Isolation Pilot Plant (WIPP)  

SciTech Connect (OSTI)

In April of 2005, the last shipment of transuranic (TRU) waste from the Rocky Flats Environmental Technology Site to the WIPP was completed. With the completion of this shipment, all transuranic waste generated and stored at Rocky Flats was successfully removed from the site and shipped to and disposed of at the WIPP. Some of the last waste to be shipped and disposed of at the WIPP was waste consisting of solidified organic liquids that is identified as Waste Type IV in the Contact-Handled Transuranic Waste Authorized Methods for Payload Control (CH-TRAMPAC) document. Waste Type IV waste typically has a composition, and associated characteristics, that make it significantly more difficult to ship and dispose of than other Waste Types, especially with respect to gas generation. This paper provides an overview of the experience gained at Rocky Flats for management, transportation and disposal of Type IV waste at WIPP, particularly with respect to gas generation testing. (authors)

D'Amico, E. L [Washington TRU Solutions (United States); Edmiston, D. R. [John Hart and Associates (United States); O'Leary, G. A. [CH2M-WG Idaho, LLC (United States); Rivera, M. A. [Aspen Resources Ltd., Inc. (United States); Steward, D. M. [Boulder Research Enterprises, LLC (United States)

2006-07-01T23:59:59.000Z

475

EVALUATION METHODOLOGY FOR PROLIFERATION RESISTANCE AND PHYSICAL PROTECTION OF GENERATION IV NUCLEAR ENERGY SYSTEMS: AN OVERVIEW.  

SciTech Connect (OSTI)

This paper provides an overview of the methodology approach developed by the Generation IV International Forum Expert Group on Proliferation Resistance & Physical Protection for evaluation of Proliferation Resistance and Physical Protection robustness of Generation IV nuclear energy systems options. The methodology considers a set of alternative systems and evaluates their resistance or robustness to a collection of potential threats. For the challenges considered, the response of the system to these challenges is assessed and expressed in terms of outcomes. The challenges to the system are given by the threats posed by potential proliferant States and sub-national adversaries on the nuclear systems. The characteristics of the Generation IV systems, both technical and institutional, are used to evaluate their response to the threats and determine their resistance against the proliferation threats and robustness against sabotage and theft threats. System response encompasses three main elements: (1) System Element Identification. The nuclear energy system is decomposed into smaller elements (subsystems) at a level amenable to further analysis. (2) Target Identification and Categorization. A systematic process is used to identify and select representative targets for different categories of pathways, within each system element, that actors (proliferant States or adversaries) might choose to use or attack. (3) Pathway Identification and Refinement. Pathways are defined as potential sequences of events and actions followed by the proliferant State or adversary to achieve its objectives (proliferation, theft or sabotage). For each target, individual pathway segments are developed through a systematic process, analyzed at a high level, and screened where possible. Segments are connected into full pathways and analyzed in detail. The outcomes of the system response are expressed in terms of PR&PP measures. Measures are high-level characteristics of a pathway that include information important to the evaluation methodology users and to the decisions of a proliferant State or adversary. They are first evaluated for segments and then aggregated for complete pathways. Results are aggregated as appropriate to permit pathway comparisons and system assessment. The paper highlights the current achievements in the development of the Proliferation Resistance and Physical Protection Evaluation Methodology. The way forward is also briefly presented together with some conclusions.

BARI, R.; ET AL.

2006-03-01T23:59:59.000Z

476

Multiple Pathways for Benzyl Alcohol Oxidation by Ru(V)?O3+ and Ru(IV)?O2+  

SciTech Connect (OSTI)

Significant rate enhancements are found for benzyl alcohol oxidation by the Ru{sup V}?O{sup 3+} form of the water oxidation catalyst [Ru(Mebimpy)(bpy)(OH{sub 2})]{sup 2+} [Mebimpy = 2,6-bis(1-methylbenzimidazol-2-yl)pyridine; bpy = 2,2?-bipyridine] compared to Ru{sup IV}?O{sup 2+} and for the Ru{sup IV}?O{sup 2+} form with added bases due to a new pathway involving concerted hydride proton transfer (HPT).

Paul, Amit; Hull, Jonathan F; Norris, Michael R; Chen, Zuofeng; Ess, Daniel H.; Concepcion, Javier J; Meyer, Thomas J.

2011-01-01T23:59:59.000Z

477

Multiple Pathways for Benzyl Alcohol Oxidation by RuV=O3+ and RuIV=O2+  

SciTech Connect (OSTI)

Significant rate enhancements are found for benzyl alcohol oxidation by the Ru{sup V}?O{sup 3+} form of the water oxidation catalyst [Ru(Mebimpy)(bpy)(OH{sub 2})]{sup 2+} [Mebimpy = 2,6-bis(1-methylbenzimidazol-2-yl)pyridine; bpy = 2,2?-bipyridine] compared to Ru{sup IV}?O{sup 2+} and for the Ru{sup IV}?O{sup 2+} form with added bases due to a new pathway, concerted hydride proton transfer (HPT).

Paul, Amit; Hull, Jonathan F; Norris, Michael R; Chen, Zuofeng; Ess, Daniel H; Concepcion, Javier J; Meyer, Thomas J

2011-01-01T23:59:59.000Z

478

Ciencias Agrarias Plan de Actuacin 2014-2017 Anexo IV: Plan de Actuacin del rea de Ciencias Agrarias  

E-Print Network [OSTI]

1 1 4 7 Plan de Actuación Área de Ciencias Agrarias #12;2 Plan de Actuación 2014-2017 Anexo IV: Plan de Actuación del Área de Ciencias Agrarias 1 1 4 7 Plan de Actuación del Área de Ciencias Agrarias RESumEN EjECutIvO La misión del Área de Ciencias Agrarias (CCAGR) es generar el conocimiento cientí

Fitze, Patrick

479

Uncertainty Quantification in the Reliability and Risk Assessment of Generation IV Reactors: Final Scientific/Technical Report  

SciTech Connect (OSTI)

The project entitled, “Uncertainty Quantification in the Reliability and Risk Assessment of Generation IV Reactors”, was conducted as a DOE NERI project collaboration between Texas A&M University and The Ohio State University between March 2006 and June 2009. The overall goal of the proposed project was to develop practical approaches and tools by which dynamic reliability and risk assessment techniques can be used to augment the uncertainty quantification process in probabilistic risk assessment (PRA) methods and PRA applications for Generation IV reactors. This report is the Final Scientific/Technical Report summarizing the project.

Vierow, Karen; Aldemir, Tunc

2009-09-10T23:59:59.000Z

480

Environmental assessment for operations, upgrades, and modifications in SNL/NM Technical Area IV  

SciTech Connect (OSTI)

The proposed action for this EA for Sandia National Laboratories/New Mexico Technical Area IV, includes continuing existing operations, modification of an existing accelerator (Particle Beam Fusion Accelerator II) to support defnese-related Z-pinch experiments, and construction of two transformer oil storage tanks to support the expansion of the Advanced Pulsed Power Research Module, a single pulse accelerator. Based on the analyses in the EA, DOE believes that the proposed action is not a major federal action significantly affecting the quality of the human environment within the meaning of NEPA and CEQ NEPA implementing regulations in 40 CFR 1508.18 and 1508.27. Therefore, an environmental impact statement is not required, and a Finding of No Significant Impact is issued.

NONE

1996-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "aerodynamics iv skirts" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

ERANOS 2.1 : International Code System for GEN IV Fast Reactor Analysis  

SciTech Connect (OSTI)

The aim of the paper is to present the new release of the European Reactor Analysis Optimized code System, ERANOS 2.1. This version has been developed and validated to establish a suitable basis for reliable neutronic calculations of current, as well as advanced fast reactor cores of the GEN IV International Forum. The latest version of the ERANOS code and data system, ERANOS 2.1, contains all of the functions required for reference and design calculations of Liquid Metal Fast Reactors (LMFR's), with extended capabilities for treating advanced reactor fuel subassemblies and cores of Gas Cooled Fast Reactors (GCFR's). The releases of recent, modern neutron data libraries: JENDL-3.3 in 2002, JEFF-3.1 in 2005 and soon ENDF/B-VII are also available. (authors)

Ruggieri, J.M.; Tommasi, J.; Lebrat, J.F.; Suteau, C.; Plisson-Rieunier, D.; De Saint Jean, C.; Rimpault, G.; Sublet, J.C. [CEA/DEN/DER/SPRC/LEPH, CEA/Cadarache, 13108 Saint Paul Lez Durance, Cedex (France)

2006-07-01T23:59:59.000Z

482

Aerospace Engineering Pickup Truck AerodynamicsPickup Truck Aerodynamics  

E-Print Network [OSTI]

distribution on a generic pickup truck geometry. · To measure the unsteady flow field in the near wake, suction type wind tunnel · Pickup truck model provided by GM R&D · Ground board mounted on top side of tunnel · Actual wind tunnel cross section 60 x 50 cm · Model mounted 380 mm from ground board leading

Al-Garni, Abdullah M.

483

JOURNAL DE PHYSIQUE IV C2-303 Collogue C2, suppl. au Journal de Physique II, Vol. 1, septembre 1991  

E-Print Network [OSTI]

JOURNAL DE PHYSIQUE IV C2-303 Collogue C2, suppl. au Journal de Physique II, Vol. 1, septembre 1991). In these conditions, conductance versus temperarature curves can exhibit maxima with some gases. There are principally and available at http://dx.doi.org/10.1051/jp4:1991237 #12;JOURNAL DE PHYSIQUE IV possible, in some cases

Boyer, Edmond

484

Nox reduction with CO over supported Pd catalysts under simulated post Euro-IV diesel exhaust conditions  

Science Journals Connector (OSTI)

The catalytic reduction of NOx with CO over Pd/Al2O3 and Pd/TiO2/Al2O3 under simulated post Euro-IV diesel exhaust conditions was studied. The catalytic activities obtained...2 loadings and total amounts of reduc...

Yinghua Li; Dae-Won Lee; Young-Chul Ko…

2008-12-01T23:59:59.000Z

485

Water management studies in PEM fuel cells, part IV: Effects of channel surface wettability, geometry and orientation on the  

E-Print Network [OSTI]

Water management studies in PEM fuel cells, part IV: Effects of channel surface wettability in the commercialization of proton exchange membrane fuel cells (PEMFCs) due to its association with the performance, cost-phase flow in parallel gas channels of proton exchange membrane fuel cells (PEMFCs) are investigated. Ex situ

Kandlikar, Satish

486

KINETICS OF OXIDATION OF AQUEOUS SULFUR(IV) BY NITROGEN DIOXIDE YIN-NAN LEE AND STEPHEN E. SCHWARTZ  

E-Print Network [OSTI]

, reagent gas solubilities, mass trans- fer, stoichiometry, and reaction rate were not systematicallyKINETICS OF OXIDATION OF AQUEOUS SULFUR(IV) BY NITROGEN DIOXIDE YIN-NAN LEE AND STEPHEN E. SCHWARTZ for the oxidation of these compounds and their incorpo- ration into atmospheric liquid water are not fully

Schwartz, Stephen E.

487

Plutonium(IV) Reduction by the Metal-Reducing Bacteria Geobacter metallireducens GS15 and Shewanella oneidensis MR1  

Science Journals Connector (OSTI)

...effectively treat with traditional remedial approaches. Currently, there...has been recommended as a remedial strategy for U-contaminated...these environments. A recent investigation of the stability of U(IV...been suggested as a possible remedial strategy for actinide-contaminated...

Hakim Boukhalfa; Gary A. Icopini; Sean D. Reilly; Mary P. Neu

2007-07-20T23:59:59.000Z

488

Efficient dehydration of carbohydrates to 5-hydroxymethylfurfural in ionic liquids catalyzed by tin(IV) phosphonate and zirconium phosphonate  

Science Journals Connector (OSTI)

In this work, we synthesized tin(IV) phosphonate (SnBPMA) and zirconium phosphonate (ZrBPMA) by the reaction of SnCl4·5H2O or ZrOCl2·8H2O with N,N...-bis(phosphonomethyl)aminoacetic acid, which was synthesized fr...

Hui Ning; JinLiang Song; MinQiang Hou; DeZhong Yang; HongLei Fan…

2013-11-01T23:59:59.000Z

489

Influence of photoperiod on the time of birth in the rat. IV. Effects of an imposed feeding rhythm  

E-Print Network [OSTI]

et al., 1980 ; Miyabo et al., 1980). Periodic food distribution has often been utilized in ratsInfluence of photoperiod on the time of birth in the rat. IV. Effects of an imposed feeding rhythm on the time of birth in rats, the onset of fetus expulsion was determined in six experimental groups. Under

Boyer, Edmond

490

JOURNAL DE PHYSIQUE IV Colloque C1, supplkment au Journal de Physique 111,Volume 5,janvier 1995  

E-Print Network [OSTI]

Positron Annihilation Characteristics in Perfect and Imperfect Transition Metal Carbides and Nitrides M-principles electronic structure and positron state calculations for transition metal carbides and nitrides are performed with recent positron lifetime measurements for group IV and V refractory metal carbides and in hexagonal WC

Paris-Sud XI, Université de

491

J. PHYS IV FRANCE 7 (1997) Colloque C1, Supplkmentau Journal de Physique I11 de mars 1997  

E-Print Network [OSTI]

solar furnace [I]. A charge of 5g of (Ni,Mn) ferrite powder mixed with 7.5g of A1203 grains was loadedinJ. PHYS IV FRANCE 7 (1997) Colloque C1, Supplkmentau Journal de Physique I11 de mars 1997 Solar was reversible and could be carried out repeatedly. 1. INTRODUCTION Solar thermal production of hydrogen

Paris-Sud XI, Université de

492

J. PHYS IV FRANCE 7 (1997) Colioque C1, Suppl6mentau Journal de Physique111de mars 1997  

E-Print Network [OSTI]

furnace. Samples were directly exposed for short time intervals to a solar flux irradiation of 300 WIcm furnace and in a high-flux solar furnace. This note summarizesthe main results obtained. 2. EXPERIMENTALJ. PHYS IV FRANCE 7 (1997) Colioque C1, Suppl6mentau Journal de Physique111de mars 1997 The Solar

Paris-Sud XI, Université de

493

Aerodynamics, computers and the environment  

Science Journals Connector (OSTI)

...8] discuss turbine blade cooling...the low-pressure turbine, which provides...a medium-sized gas turbine engine). Hence...the flow control strategy interacts with the...commercial, stunts the development of high-order...

2014-01-01T23:59:59.000Z

494

Micro-unmanned aerodynamic vehicle  

DOE Patents [OSTI]

A MEMS-based micro-unmanned vehicle includes at least a pair of wings having leading wing beams and trailing wing beams, at least two actuators, a leading actuator beam coupled to the leading wing beams, a trailing actuator beam coupled to the trailing wing beams, a vehicle body having a plurality of fulcrums pivotally securing the leading wing beams, the trailing wing beams, the leading actuator beam and the trailing actuator beam and having at least one anisotropically etched recess to accommodate a lever-fulcrum motion of the coupled beams, and a power source.

Reuel, Nigel (Rio Rancho, NM); Lionberger, Troy A. (Ann Arbor, MI); Galambos, Paul C. (Albuquerque, NM); Okandan, Murat (Albuquerque, NM); Baker, Michael S. (Albuquerque, NM)

2008-03-11T23:59:59.000Z

495

Aerodynamic Lightweight Cab Structure Components  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

496

TIMEINTEGRATION METHODS IN COMPUTATIONAL AERODYNAMICS  

E-Print Network [OSTI]

.0000 to 0.3825 & % #12;' $ Vortical Flow around a F18 & % #12;#12;' $ Steady-State Solvers based on Time

Stanford University

497

The Crystal Structure of a High-Spin Oxoiron(IV) Complex and Characterization of Its Self-Decay Pathway  

SciTech Connect (OSTI)

[Fe{sup IV}(O)(TMG{sub 3}tren)]{sup 2+} (1; TMG{sub 3}tren = 1,1,1-tris{l_brace}2-[N{sup 2}-(1,1,3,3-tetramethylguanidino)]ethyl{r_brace}amine) is a unique example of an isolable synthetic S = 2 oxoiron(IV) complex, which serves as a model for the high-valent oxoiron(IV) intermediates observed in nonheme iron enzymes. Congruent with DFT calculations predicting a more reactive S = 2 oxoiron(IV) center, 1 has a lifetime significantly shorter than those of related S = 1 oxoiron(IV) complexes. The self-decay of 1 exhibits strictly first-order kinetic behavior and is unaffected by solvent deuteration, suggesting an intramolecular process. This hypothesis was supported by ESI-MS analysis of the iron products and a significant retardation of self-decay upon use of a perdeuteromethyl TMG{sub 3}tren isotopomer, d{sub 36}-1 (KIE = 24 at 25 C). The greatly enhanced thermal stability of d{sub 36}-1 allowed growth of diffraction quality crystals for which a high-resolution crystal structure was obtained. This structure showed an Fe=O unit (r = 1.661(2) {angstrom}) in the intended trigonal bipyramidal geometry enforced by the sterically bulky tetramethylguanidinyl donors of the tetradentate tripodal TMG{sub 3}tren ligand. The close proximity of the methyl substituents to the oxoiron unit yielded three symmetrically oriented short C-D {hor_ellipsis} O nonbonded contacts (2.38-2.49 {angstrom}), an arrangement that facilitated self-decay by rate-determining intramolecular hydrogen atom abstraction and subsequent formation of a ligand-hydroxylated iron(III) product. EPR and Moessbauer quantification of the various iron products, referenced against those obtained from reaction of 1 with 1,4-cyclohexadiene, allowed formulation of a detailed mechanism for the self-decay process. The solution of this first crystal structure of a high-spin (S = 2) oxoiron(IV) center represents a fundamental step on the path toward a full understanding of these pivotal biological intermediates.

England, J.; Guo, Y; Farquhar, E; Young, Jr., V; Münck, E; Que, Jr., L

2010-01-01T23:59:59.000Z

498

BigBOSS: The Ground-Based Stage IV Dark Energy Experiment  

E-Print Network [OSTI]

The BigBOSS experiment is a proposed DOE-NSF Stage IV ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of structure with an all-sky galaxy redshift survey. The project is designed to unlock the mystery of dark energy using existing ground-based facilities operated by NOAO. A new 4000-fiber R=5000 spectrograph covering a 3-degree diameter field will measure BAO and redshift space distortions in the distribution of galaxies and hydrogen gas spanning redshifts from 0.2merit (DETF FoM) for this experiment is expected to be equal to that of a JDEM mission for BAO with the lower risk and cost typical of a ground-based experiment. This project will enable an unprecedented multi-object spectroscopic capability for the U.S. community through an existing NOAO facility. The U.S. community would have access directly to this instrument/telescope combination, as well as access to the legacy archives that will be created by the ...

Schlegel, David J; Heetderks, Henry; Ho, Shirley; Lampton, Michael; Levi, Michael; Mostek, Nick; Padmanabhan, Nikhil; Perlmutter, Saul; Roe, Natalie; Sholl, Michael; Smoot, George; White, Martin; Dey, Arjun; Abraham, Tony; Jannuzi, Buell; Joyce, Dick; Liang, Ming; Merrill, Mike; Olsen, Knut; Salim, Samir

2009-01-01T23:59:59.000Z

499

Effect of aging on the solubility and crystallinity of Np(IV) hydrous oxide  

SciTech Connect (OSTI)

Neptunium(IV) hydrous oxide (NpO/sub 2/ x xH/sub 2/O) was aged in aqueous suspensions with pH values ranging from 4 to 12. Initially amorphous NpO/sub 2/ x xH/sub 2/O developed strong X-ray diffraction peaks within one month that corresponded to crystalline NpO/sub 2/. The oxidation state analyses of the 1.8 nm filtered solutions showed the Np to be primarily present as Np(V). The solubility of NpO/sub 2/ x xH/sub 2/O in suspensions at pH values < 8.5 followed the NpO/sub 2/ x xH/sub 2/O in equilibrium NpO/sub 2//sup +/ + e/sup -/ + xH/sub 2/O reaction with an apparent log K/sup 0/ (after 200 days) of -10 +/- 1. The results of the aqueous suspensions with pH values > 8.5 were complicated by the partial conversion of the NpO/sub 2/ x xH/sub 2/O to an amorphous, oxidized Np solid, and possibly by Np aqueous speciation other than NpO/sub 2/OH/sup 0/. 13 references, 4 figures, 3 tables.

Strickert, R.G.; Rai, D.; Fulton, R.W.

1984-01-01T23:59:59.000Z

500

Method and apparatus for I-V data acquisition from solar cells  

DOE Patents [OSTI]

A method and apparatus for logging current-voltage (I-V) characteristic d of a solar cell module (10) in two modes using a portable instrument. One mode controls the load current through a circuit (36) in 256 equal intervals while voltage is measured from open circuit to at least halfway into the knee of the curve and the other mode controls the load voltage through a circuit (34) in 256 equal intervals from the lowest voltage measurement possible (short circuit) to at least halfway into the knee of the curve, under control of a microcomputer (12). All measurements are packed by discarding each measurement that is within 0.5% of the value predicted from two previous measurements, except every ninth (9th) measurement which is retained. The remaining data is further packed into a memory block of a detachable storage medium (14) by recording the data points in sequence following a header containing data common to all points, with each point having the value of the controlled parameter recorded as the number of increments from the previous point recorded followed by the measured value. The detachable storage medium is preferably a solid state device for reliability, and is transferable to a playback terminal which unpacks the data for analysis and display.

Cole, Steven W. (Covina, CA)

1985-01-01T23:59:59.000Z