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We encourage you to perform a real-time search of NLEBeta
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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, Ronald S. (Livermore, CA); Susoeff, Allan R. (Pleasanton, CA)

1994-01-01T23:59:59.000Z

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

1994-01-04T23:59:59.000Z

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

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

6

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

7

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

8

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

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

aiaa applied aerodynamics: Topics by E-print Network  

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

Aerodynamic Engineering Websites Summary: AIAA 96-0409 Automatic Aerodynamic Optimization on Distributed Memory Architectures Antony Jameson-0409 Automatic Aerodynamic...

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

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

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

Freight Wing Trailer Aerodynamics  

SciTech Connect (OSTI)

Freight Wing Incorporated utilized the opportunity presented by this DOE category one Inventions and Innovations grant to successfully research, develop, test, patent, market, and sell innovative fuel and emissions saving aerodynamic attachments for the trucking industry. A great deal of past scientific research has demonstrated that streamlining box shaped semi-trailers can significantly reduce a truck's fuel consumption. However, significant design challenges have prevented past concepts from meeting industry needs. Market research early in this project revealed the demands of truck fleet operators regarding aerodynamic attachments. Products must not only save fuel, but cannot interfere with the operation of the truck, require significant maintenance, add significant weight, and must be extremely durable. Furthermore, SAE/TMC J1321 tests performed by a respected independent laboratory are necessary for large fleets to even consider purchase. Freight Wing used this information to create a system of three practical aerodynamic attachments for the front, rear and undercarriage of standard semi trailers. SAE/TMC J1321 Type II tests preformed by the Transportation Research Center (TRC) demonstrated a 7% improvement to fuel economy with all three products. If Freight Wing is successful in its continued efforts to gain market penetration, the energy and environmental savings would be considerable. Each truck outfitted saves approximately 1,100 gallons of fuel every 100,000 miles, which prevents over 12 tons of CO2 from entering the atmosphere. If all applicable trailers used the technology, the country could save approximately 1.8 billion gallons of diesel fuel, 18 million tons of emissions and 3.6 billion dollars annually.

Graham, Sean (Primary Investigator); Bigatel, Patrick

2004-10-17T23:59:59.000Z

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

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

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 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

22

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

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

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

25

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.

26

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

27

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.

28

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

29

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

30

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

31

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.

32

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

33

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

34

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.

35

AIAA 20030185 Aerodynamically Controlled Expansion  

E-Print Network [OSTI]

undesirable over-expansion in generalized supersonic nozzle flows. Nomenclature A cross-sectional area fgAIAA 2003­0185 Aerodynamically Controlled Expansion Nozzle for STOVL Aircraft D.A. Terrier Lockheed Controlled Expansion Nozzle for STOVL Aircraft Douglas A. Terrier* Lockheed Martin Aeronautics Company, Fort

Texas at Arlington, University of

36

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

37

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

38

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

39

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.

40

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

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 features vehicle body components: Topics by E-print...  

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

is a considerable body of information available Kreinovich, Vladik 2 Aerodynamic optimization of a solar powered race vehicle MIT - DSpace Summary: Aerodynamic optimization was...

43

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

44

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

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 coe subject classifications. 65N12,65N15,65N30 1. Introduction. In aerodynamic computations like compressible

Hartmann, Ralf

46

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

47

16.100 Aerodynamics, Fall 2002  

E-Print Network [OSTI]

This course extends fluid mechanic concepts from Unified Engineering to the aerodynamic performance of wings and bodies in sub/supersonic regimes. 16.100 generally has four components: subsonic potential flows, including ...

Darmofal, David L.

48

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

49

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.

50

Inequality design limits in optimal aerodynamic shapes  

E-Print Network [OSTI]

INEQUALITY DESIGN LIMITS IN OPTIMAL AERODYNAMIC SHAPES A Thesis By CHARLES KNIGHT SEAMAN Submitted to the Graduate College of the Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1968... Major Subject: Aerospace Engineering INEQUALITY DESIGN LIMITS IN OPTIMAL AERODYNAMIC SHAPES A Thesis By CHARLES KNIGHT SEAMAN Approved as to style and content by: (Chairman of Committee) (Head of Department) (Member) (Member) May 1968...

Seaman, Charles Knight

1968-01-01T23:59:59.000Z

51

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

52

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

53

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

54

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

55

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

56

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

57

Comparison of the Coulter Multisizer and Aerodynamic Particle Sizer for obtaining the aerodynamic particle size of irregularly shaped dust  

E-Print Network [OSTI]

When studying air quality it is often necessary to measure the aerodynamic size distribution of particles. True aerodynamic diameter must be measured using a gravitational settling method, which is impractical. Other methods exist that use other...

McClure, Joshua Wayne

2002-01-01T23:59:59.000Z

58

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.

59

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

60

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

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While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

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

62

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

63

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

64

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.

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. 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

66

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.

67

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.

68

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.

69

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

70

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

71

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

72

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

73

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

74

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.

75

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

76

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

77

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.

78

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.

79

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

80

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

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

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

82

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

83

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

84

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

85

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

86

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.

87

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

88

Anisotropic Grid Adaptation for Multiple Aerodynamic Outputs  

E-Print Network [OSTI]

Anisotropic Grid Adaptation for Multiple Aerodynamic Outputs David A. Venditti and David L Anisotropic grid­adaptive strategies are presented for viscous flow simulations in which the accurate estimation and Hessian-based anisotropic grid adaptation. Airfoil test cases are presented to demonstrate

Peraire, Jaime

89

Device for reducing vehicle aerodynamic resistance  

DOE Patents [OSTI]

A device for reducing vehicle aerodynamic resistance for vehicles having a generally rectangular flat front face comprising a plurality of load bearing struts of a predetermined size attached to the flat front face adjacent the sides and top thereof, a pair of pliable opposing flat sheets having an outside edge portion attached to the flat front face adjacent the sides thereof and an upper edge with a predetermined curve; the opposing flat sheets being bent and attached to the struts to form effective curved airfoil shapes, and a top pliable flat sheet disposed adjacent the top of the flat front face and having predetermined curved side edges, which, when the top sheet is bent and attached to the struts to form an effective curved airfoil shape, mate with the curved upper edges of the opposing sheets to complete the aerodynamic device.

Graham, Sean C.

2006-03-07T23:59:59.000Z

90

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

91

Device for reducing vehicle aerodynamic resistance  

DOE Patents [OSTI]

A device for reducing vehicle aerodynamic resistance for vehicles having a generally rectangular body disposed above rear wheels, comprising a plurality of load bearing struts attached to the bottom of the rectangular body adjacent its sides, a plurality of opposing flat sheets attached to the load bearing struts, and angled flaps attached to the lower edge of the opposing sheets defining an obtuse angle with the opposing flat sheets extending inwardly with respect to the sides of the rectangular body to a predetermined height above the ground, which, stiffen the opposing flat sheets, bend to resist damage when struck by the ground, and guide airflow around the rear wheels of the vehicle to reduce its aerodynamic resistance when moving.

Graham, Sean C.

2006-08-22T23:59:59.000Z

92

Device for reducing vehicle aerodynamic resistance  

DOE Patents [OSTI]

A device for a vehicle with a pair of swinging rear doors, which converts flat sheets of pliable material hinged to the sides of the vehicle adjacent the rear thereof into effective curved airfoils that reduce the aerodynamic resistance of the vehicle, when the doors are closed by hand, utilizing a plurality of stiffeners disposed generally parallel to the doors and affixed to the sheets and a plurality of collapsible tension bearings struts attached to each stiffener and the adjacent door.

Graham, Sean C.

2005-02-15T23:59:59.000Z

93

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

94

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

95

LABORATORY IV ELECTRIC CIRCUITS  

E-Print Network [OSTI]

LABORATORY IV ELECTRIC CIRCUITS Lab IV - 1 In the first laboratory, you studied the behavior of electric fields and their effect on the motion of electrons using a cathode ray tube (CRT). This beam of electrons is one example of an electric current ­ charges in motion. The current in the CRT was simple

Minnesota, University of

96

aerodynamic shape design: Topics by E-print Network  

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

MASTER OF SCIENCE May 1968... Seaman, Charles Knight 2012-06-07 2 Numerical Shape Optimization of Airfoils With Practical Aerodynamic Design Requirements. Open Access Theses and...

97

advanced aerodynamic devices: Topics by E-print Network  

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

power line icing and wind turbine icing Hu, Hui 2 Advances in Aerodynamic Shape Optimization Antony Jameson1 Engineering Websites Summary: implicitly via a second order...

98

aerodynamic response approximation: Topics by E-print Network  

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

Page Topic Index 1 Managing Approximate Models in Evolutionary Aerodynamic Design Optimization Computer Technologies and Information Sciences Websites Summary: algorithm to a...

99

aerodynamic control preprint: Topics by E-print Network  

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

of 2 Aerodynamic design via control theory CiteSeer Summary: wing design; optimization. flow; inverse I. INTRODUCTION AND HISTORICAL SURVEY Computers have had a twofold...

100

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

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

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

102

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

103

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...

104

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...

105

E-Print Network 3.0 - active aerodynamic control Sample Search...  

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

aerodynamic control Search Powered by Explorit Topic List Advanced Search Sample search results for: active aerodynamic control Page: << < 1 2 3 4 5 > >> 1 MECHANICAL AND AEROSPACE...

106

E-Print Network 3.0 - aircraft aerodynamic derivatives Sample...  

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

aerodynamic derivatives Search Powered by Explorit Topic List Advanced Search Sample search results for: aircraft aerodynamic derivatives Page: << < 1 2 3 4 5 > >> 1 Morphing...

107

E-Print Network 3.0 - analytical aerodynamic model Sample Search...  

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

aerodynamic model Search Powered by Explorit Topic List Advanced Search Sample search results for: analytical aerodynamic model Page: << < 1 2 3 4 5 > >> 1 LABORATOIRE D'INGNIERIE...

108

E-Print Network 3.0 - aerodynamic space -to Sample Search Results  

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

Aerodynamics... Measurements of Air Quality Gas Dynamics High-Speed Aerodynamics and Heat Transfer Kinetic Theory-Based ... Source: Texas A&M University, Texas Transportation...

109

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...

110

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...

111

E-Print Network 3.0 - aerodynamic measurement technology Sample...  

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

Technology, 2434 BRISBANE QLD 4001 AUSTRALIA Abstract In order to reduce aerodynamic... -17 December 2004 Identification of aerodynamic sound source in the wake of a rotating...

112

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

113

E-Print Network 3.0 - aerodynamic side loads Sample Search Results  

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

University Collection: Engineering 5 Aerodynamic Shape Optimization of a Freight Train Subjected to a 30 Side Wind with CFD Summary: Aerodynamic Shape Optimization of a...

114

aerodynamic design optimization: Topics by E-print Network  

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

aerodynamic design optimization First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Aerodynamic design...

115

aerodynamic shape optimization: Topics by E-print Network  

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

aerodynamic shape optimization First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 AIAA 982538 Aerodynamic...

116

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

117

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

118

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

119

Methods of reducing vehicle aerodynamic drag  

SciTech Connect (OSTI)

A small scale model (length 1710 mm) of General Motor SUV was built and tested in the wind tunnel for expected wind conditions and road clearance. Two passive devices, rear screen which is plate behind the car and rear fairing where the end of the car is aerodynamically extended, were incorporated in the model and tested in the wind tunnel for different wind conditions. The conclusion is that rear screen could reduce drag up to 6.5% and rear fairing can reduce the drag by 26%. There were additional tests for front edging and rear vortex generators. The results for drag reduction were mixed. It should be noted that there are aesthetic and practical considerations that may allow only partial implementation of these or any drag reduction options.

Sirenko V.; Rohatgi U.

2012-07-08T23:59:59.000Z

120

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...

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-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

122

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...

123

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

124

Aerodynamic performance measurements in a counter-rotating aspirated compressor  

E-Print Network [OSTI]

This thesis is an experimental investigation of the aerodynamic performances of a counter-rotating aspirated compressor. This compressor is implemented in a blow-down facility, which gives rigorous simulation of the ...

Onnée, Jean-François

2005-01-01T23:59:59.000Z

125

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

126

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

127

Aerodynamic optimization of a solar powered race vehicle  

E-Print Network [OSTI]

Aerodynamic optimization was performed on Tesseract, the MIT Solar Electric Vehicle Team's 2003-2005 solar car using Wind Tunnel 8 at Jacobs/Sverdrup Drivability Test Facility in Allen Park, MI. These tests include angle ...

Augenbergs, Peteris K

2006-01-01T23:59:59.000Z

128

Reduced-order aerodynamic models for aeroelastic control of turbomachines  

E-Print Network [OSTI]

Aeroelasticity is a critical consideration in the design of gas turbine engines, both for stability and forced response. Current aeroelastic models cannot provide high-fidelity aerodynamics in a form suitable for design ...

Willcox, Karen Elizabeth

129

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

130

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

131

DOE Project on Heavy Vehicle Aerodynamic Drag  

SciTech Connect (OSTI)

Class 8 tractor-trailers consume 11-12% of the total US petroleum use. At highway speeds, 65% of the energy expenditure for a Class 8 truck is in overcoming aerodynamic drag. The project objective is to improve fuel economy of Class 8 tractor-trailers by providing guidance on methods of reducing drag by at least 25%. A 25% reduction in drag would present a 12% improvement in fuel economy at highway speeds, equivalent to about 130 midsize tanker ships per year. Specific goals include: (1) Provide guidance to industry in the reduction of aerodynamic drag of heavy truck vehicles; (2) Develop innovative drag reducing concepts that are operationally and economically sound; and (3) Establish a database of experimental, computational, and conceptual design information, and demonstrate the potential of new drag-reduction devices. The studies described herein provide a demonstration of the applicability of the experience developed in the analysis of the standard configuration of the Generic Conventional Model. The modeling practices and procedures developed in prior efforts have been applied directly to the assessment of new configurations including a variety of geometric modifications and add-on devices. Application to the low-drag 'GTS' configuration of the GCM has confirmed that the error in predicted drag coefficients increases as the relative contribution of the base drag resulting from the vehicle wake to the total drag increases and it is recommended that more advanced turbulence modeling strategies be applied under those circumstances. Application to a commercially-developed boat tail device has confirmed that this restriction does not apply to geometries where the relative contribution of the base drag to the total drag is reduced by modifying the geometry in that region. Application to a modified GCM geometry with an open grille and radiator has confirmed that the underbody flow, while important for underhood cooling, has little impact on the drag coefficient of the vehicle. Furthermore, the evaluation of the impact of small changes in radiator or grille dimensions has revealed that the total drag is not particularly sensitive to those changes. This observation leads to two significant conclusions. First, a small increase in radiator size to accommodate heat rejection needs related to new emissions restrictions may be tolerated without significant increases in drag losses. Second, efforts to reduce drag on the tractor requires that the design of the entire tractor be treated in an integrated fashion. Simply reducing the size of the grille will not provide the desired result, but the additional contouring of the vehicle as a whole which may be enabled by the smaller radiator could have a more significant effect.

McCallen, R; Salari, K; Ortega, J; Castellucci, P; Pointer, D; Browand, F; Ross, J; Storms, B

2007-01-04T23:59:59.000Z

132

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

133

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

134

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

135

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

136

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

137

E-Print Network 3.0 - aerodynamic drag fy Sample Search Results  

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

fy Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic drag fy Page: << < 1 2 3 4 5 > >> 1 Aerodynamic-Structural Design Studies of...

138

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

139

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

140

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.

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

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

142

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.

143

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

144

POLICY IV.4.1 Volume IV: Human Resources  

E-Print Network [OSTI]

POLICY IV.4.1 Volume IV: Human Resources Chapter 4: Classification Issuing Office: Human Resource Resource Services Originally Issued: August 19, 1968 Most Recently Revised: March 3, 2006 1 Classification Responsibilities 7 History 7 Official Documentation 7 Statement of Policy Human Resource Services classifies

145

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....

146

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

147

A Critical Review of Electric and Electromagnetic Flow Control Research Applied to Aerodynamics  

E-Print Network [OSTI]

A Critical Review of Electric and Electromagnetic Flow Control Research Applied to Aerodynamics control (EMFC) to improve aerodynamic performance. This led to an era of research that focused on coupling control concepts applied to control surface aerodynamics have not seen the same level of advancement

Texas at Arlington, University of

148

99--MarMar--0707 11AERODYNAMIC RESEARCH CENTER MECHANICAL AND AEROSPACE ENGINEERING DEPARTMENT  

E-Print Network [OSTI]

99--MarMar--0707 11AERODYNAMIC RESEARCH CENTER MECHANICAL AND AEROSPACE ENGINEERING DEPARTMENT and The National Science Council, Taiwan, ROC ·Philip K. Panicker Aerodynamic Research Center, University of Texas Department, UT Arlington, Arlington, Texas, 76019 #12;99--MarMar--0707 22AERODYNAMIC RESEARCH CENTER

Texas at Arlington, University of

149

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.

150

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.

151

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

152

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.

153

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.

154

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.

155

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

156

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

157

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.

158

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

159

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

160

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.

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

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

162

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

163

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

164

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

165

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

166

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

167

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

168

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.

169

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

170

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

171

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

172

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

173

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

174

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.

175

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

176

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

177

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

178

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

179

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.

180

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

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

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

182

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

183

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.

184

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

185

Advanced Flow Diagnostics and Experimental Aerodynamics Laboratory Department of Aerospace Engineering  

E-Print Network [OSTI]

Dr. Hui HU Advanced Flow Diagnostics and Experimental Aerodynamics Laboratory Department-inspired flows, bioinspired aerodynamic designs for micro-air-vehicle (MAV) applications. ­ Microfluidics, micro. ­ Low-speed aerodynamics, laminar boundary layer separation, transition and flow control. ­ Wind

Hu, Hui

186

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

187

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

188

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.

189

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

190

LABORATORY IV CONSERVATION OF ENERGY  

E-Print Network [OSTI]

Lab IV - 1 LABORATORY IV CONSERVATION OF ENERGY In this lab you will begin to use the principle of conservation of energy to determine the motion resulting from interactions that are difficult to analyze using force concepts alone. You will explore how conservation of energy is applied to real interactions. Keep

Minnesota, University of

191

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

192

Plasma Aerodynamic Control Effectors for Improved Wind Turbine Performance  

SciTech Connect (OSTI)

Orbital Research Inc is developing an innovative Plasma Aerodynamic Control Effectors (PACE) technology for improved performance of wind turbines. The PACE system is aimed towards the design of "smart" rotor blades to enhance energy capture and reduce aerodynamic loading and noise using flow-control. The PACE system will provide ability to change aerodynamic loads and pitch distribution across the wind turbine blade without any moving surfaces. Additional benefits of the PACE system include reduced blade structure weight and complexity that should translate into a substantially reduced initial cost. During the Phase I program, the ORI-UND Team demonstrated (proof-of-concept) performance improvements on select rotor blade designs using PACE concepts. Control of both 2-D and 3-D flows were demonstrated. An analytical study was conducted to estimate control requirements for the PACE system to maintain control during wind gusts. Finally, independent laboratory experiments were conducted to identify promising dielectric materials for the plasma actuator, and to examine environmental effects (water and dust) on the plasma actuator operation. The proposed PACE system will be capable of capturing additional energy, and reducing aerodynamic loading and noise on wind turbines. Supplementary benefits from the PACE system include reduced blade structure weight and complexity that translates into reduced initial capital costs.

Mehul P. Patel; Srikanth Vasudevan; Robert C. Nelson; Thomas C. Corke

2008-08-01T23:59:59.000Z

193

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

194

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.

195

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.

196

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...

197

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

198

Inclusion of nonlinear aerodynamics in the FLAP code  

SciTech Connect (OSTI)

Horizontal axis wind turbines usually operate with significant portions of the blade in deep stall. This contradicts the assumption in the FLAP code that a linear relation exists between the angle of attack and the lift coefficient. The objective of this paper is to determine the importance of nonlinear aerodynamics in the prediction of loads. The FLAP code has been modified to include the nonlinear relationships between the lift and drag coefficients with the angle of attack. The modification affects the calculation of the induced velocities and the aerodynamic loads. This requires an iterative procedure to determine the induced velocities instead of a closed form solution. A more advanced tower interference model has also been added that accounts for both upwind and downwind tower effects. 7 refs., 14 figs.

Weber, T. (Solar Energy Research Inst., Golden, CO (USA)) [Solar Energy Research Inst., Golden, CO (USA)

1989-11-01T23:59:59.000Z

199

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

200

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

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Airfoil Summary: Design Ahmed Abdelwahab Manager of Turbomachinery Aerodynamics Praxair Inc., Global Supply System... compressor stage are discussed. A test case of the...

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201

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...

202

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...

203

E-Print Network 3.0 - applied aerodynamics conference Sample...  

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

of Aerospace Engineering, Texas A&M University Collection: Engineering 2 Journal of Wind Engineering and Industrial Aerodynamics 91 (2003) 15111528 Summary: Journal of Wind...

204

E-Print Network 3.0 - aerodynamic flow simulation Sample Search...  

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(ICCEPT) Collection: Multidisciplinary Databases and Resources 4 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: . The authors directly...

205

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

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Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 3 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: of the random wind...

206

E-Print Network 3.0 - aerodynamic parameter estimation Sample...  

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Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 3 Journal of Wind Engineering and Industrial Aerodynamics 91 (2003) 15111528 Summary: in the identification...

207

E-Print Network 3.0 - aerodynamic force acting Sample Search...  

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

Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 2 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: as the approach flow,...

208

E-Print Network 3.0 - aerodynamic load prediction Sample Search...  

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

Geological Sciences, University of Notre Dame Collection: Engineering 4 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: a time domain framework...

209

E-Print Network 3.0 - aerodynamic force Sample Search Results  

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

Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 4 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: of the random wind...

210

E-Print Network 3.0 - aerodynamic forces acting Sample Search...  

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

Ecole Polytechnique, Centre de mathmatiques Collection: Mathematics 2 Journal of Wind Engineering and Industrial Aerodynamics 90 (2002) 639642 Summary: as the approach flow,...

211

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...

212

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...

213

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...

214

E-Print Network 3.0 - aerodynamics experiment phase Sample Search...  

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

wings that use... computational analysis as capable of attaining very different aerodynamic ... Source: Kirby, Brian J. - Sibley School of Mechanical and Aerospace...

215

E-Print Network 3.0 - aerodynamic drag reduction 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 drag reduction Page: << < 1 2 3 4 5 > >> 1 Australasian Fluid Mechanics Conference...

216

E-Print Network 3.0 - aerodynamic performance evaluation 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 performance evaluation Page: << < 1 2 3 4 5 > >> 1 Morphing Aircraft Dynamical...

217

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...

218

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...

219

E-Print Network 3.0 - aerodynamic flow control 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 flow control Page: << < 1 2 3 4 5 > >> 1 Australasian Fluid Mechanics Conference...

220

E-Print Network 3.0 - aerodynamic predictions comparisons 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 predictions comparisons Page: << < 1 2 3 4 5 > >> 1 Australasian Fluid Mechanics...

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

E-Print Network 3.0 - aerodynamic decelerator systems 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 decelerator systems Page: << < 1 2 3 4 5 > >> 1 Fundamental Fundamental Summary:...

222

E-Print Network 3.0 - aerodynamic characteristics research Sample...  

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

Engineering 30 American Institute of Aeronautics and Astronautics Aerodynamics of Ice Remnants from Protected Surfaces Summary: and describe what is known about the...

223

E-Print Network 3.0 - aerodynamic stability study Sample Search...  

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 ... Source: Ecole Polytechnique, Centre de mathmatiques Collection:...

224

E-Print Network 3.0 - aerodynamic lift Sample Search Results  

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

Mayuresh - Department of Aerospace and Ocean Engineering, Virginia Tech Collection: Engineering 9 ME422. Fluid II Victor Yakhot Summary: , nanofluidics , basic aerodynamics...

225

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

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and Aerospace Engineering, Aerodynamics Research Center Collection: Engineering 12 ENERGY PERSPECTIVES IN AEROELASTIC CONTROL Mayuresh J. Patil Summary: from the flow. The...

226

E-Print Network 3.0 - aerodynamic converter etudes Sample Search...  

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clearance increased lift and decreased drag for varied AoA. Introduction Aerodynamic devices such as wings... and tyres (downforce). This can increase the performance envelope...

227

E-Print Network 3.0 - aerodynamic loads estimated Sample Search...  

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We conducted... due to the aerodynamic effect. Furthermore, the weight penalties of a train ... Source: Barkan, Christopher P.L. - Railroad Engineering Program & Department of...

228

E-Print Network 3.0 - aerodynamic noise Sample Search Results  

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

Boston University Collection: Engineering 5 CURVE FlTTlNG PROCEDURES FOR HIGH SPEED TRAINS Summary: - an aerodynamic noise which predominates at high speeds. Each noise...

229

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

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

Engineering 13 Machine Vision Analysis of the Energy Efficiency of Intermodal Trains Summary: -in-Train on Aerodynamic Resistance, Publication R-705. Association of...

230

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

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of Melbourne Collection: Engineering 3 CURVE FlTTlNG PROCEDURES FOR HIGH SPEED TRAINS Summary: - an aerodynamic noise which predominates at high speeds. Each noise...

231

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

232

Aerodynamic size associations of natural radioactivity with ambient aerosols  

SciTech Connect (OSTI)

The aerodynamic size of /sup 214/Pb, /sup 212/Pb, /sup 210/Pb, /sup 7/Be, /sup 32/P, /sup 35/S (as SO/sub 4//sup 2 -/), and stable SO/sub 4//sup 2 -/ was measured using cascade impactors. The activity distribution of /sup 212/Pb and /sup 214/Pb, measured by alpha spectroscopy, was largely associated with aerosols smaller than 0.52 ..mu..m. Based on 46 measurements, the activity median aerodynamic diameter of /sup 212/Pb averaged 0.13 ..mu..m (sigma/sub g/ = 2.97), while /sup 214/Pb averaged 0.16 ..mu..m (sigma/sub g/ = 2.86). The larger median size of /sup 214/Pb was attributed to ..cap alpha..-recoil depletion of smaller aerosols following decay of aerosol-associated /sup 218/Po. Subsequent /sup 214/Pb condensation on all aerosols effectively enriches larger aerosols. /sup 212/Pb does not undergo this recoil-driven redistribution. Low-pressure impactor measurements indicated that the mass median aerodynamic diameter of SO/sub 4//sup 2 -/ was about three times larger than the activity median diameter /sup 212/Pb, reflecting differences in atmospheric residence times as well as the differences in surface area and volume distributions of the atmospheric aerosol. Cosmogenic radionuclides, especially /sup 7/Be, were associated with smaller aerosols than SO/sub 4//sup 2 -/ regardless of season, while /sup 210/Pb distributions in summer measurements were similar to sulfate but smaller in winter measurements. Even considering recoil following /sup 214/Po ..cap alpha..-decay, the avervage /sup 210/Pb labeled aerosol grows by about a factor of two during its atmospheric lifetime. The presence of 5 to 10% of the /sup 7/Be on aerosols greater than 1 ..mu..m was indicative of post-condensation growth, probably either in the upper atmosphere or after mixing into the boundary layer.

Bondietti, E.A.; Papastefanou, C.; Rangarajan, C.

1986-04-01T23:59:59.000Z

233

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

234

Aerodynamic Lightweight Cab Structure Components | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment of EnergyAdministrative2|Department ofDepartmentProposedAerodynamic

235

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

236

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.

237

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

238

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

239

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"

240

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

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

Numerical Investigation of a Wind Turbine Rotor with an aerodynamically redesigned hub-region  

E-Print Network [OSTI]

Numerical Investigation of a Wind Turbine Rotor with an aerodynamically redesigned hub-region J methods on a redesigned modern Mega-Watt sized wind turbine, where the new design includes an increase of the blade in the vicinity of the wind turbine nacelle, to obtain an aerodynamically more efficient rotor

242

KNMI publication; 196 -IV Rainfall generator for  

E-Print Network [OSTI]

KNMI publication; 196 - IV Rainfall generator for the Meuse basin Description of 20 000-year simulations R. Leander and T.A. Buishand De Bilt, 2008 #12;KNMI publication = KNMI publicatie; 196 - IV De, without prior permission in writing from the publisher. . . . . #12;KNMI-publication; 196-IV

Stoffelen, Ad

243

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

244

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

245

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

246

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

247

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

248

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

249

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

250

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

251

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

252

Aerodynamic testing of a rotating wind turbine blade  

SciTech Connect (OSTI)

Aerodynamic, load, flow-visualization, and inflow measurements were taken on a downwind horizontal-axis wind turbine (HAWT). A video camera mounted on the rotor recorded video images of tufts attached to the low-pressure side of the blade. Strain gages, mounted every 10% of the blade's span, provided load and pressure measurements. Pressure taps at 32 chordwise positions recorded pressure distributions. Wind inflow was measured via a vertical-plane array of anemometers located 10 m upwind. The objectives of the test were to address whether airfoil pressure distributions measured on a rotating blade differed from those measured in the wind tunnel, if radial flow near or in the boundary layer of the airfoil affected pressure distributions, if dynamic stall could result in increased dynamic loads, and if the location of the separation boundary measured on the rotating blade agreed with that measured in two-dimensional flow in the wind tunnel. 6 refs., 9 figs., 1 tab.

Butterfield, C.P.; Nelsen, E.N.

1990-01-01T23:59:59.000Z

253

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

254

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

255

EnvWiltonIV-EIS  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing Zirconia NanoparticlesSmartAffects the FutureEnrico RossiEnvironmentWilton IV

256

Alta IV | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentrating SolarElectricEnergy InformationTuriAlexandriaAlstom Energy SystemsAlta IIIAlta IV

257

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

258

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.

259

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

260

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

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

E-Print Network 3.0 - aerodynamic localizer pal Sample Search...  

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

pal Search Powered by Explorit Topic List Advanced Search Sample search results for: aerodynamic localizer pal Page: << < 1 2 3 4 5 > >> 1 J. Phys. III Franc-e 4 (1994) 783-804...

262

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

263

E-Print Network 3.0 - aerodynamic surface quantities 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 surface quantities Page: << < 1 2 3 4 5 > >> 1 J. Phys. III Franc-e 4 (1994)...

264

E-Print Network 3.0 - aerodynamic performance prediction 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 performance prediction Page: << < 1 2 3 4 5 > >> 1 J. Phys. III Franc-e 4 (1994)...

265

Challenges in Simulation of Aerodynamics, Hydrodynamics, and Mooring-Line Dynamics of Floating Offshore Wind Turbines  

SciTech Connect (OSTI)

This paper presents the current major modeling challenges for floating offshore wind turbine design tools and describes aerodynamic and hydrodynamic effects due to rotor and platform motions and usage of non-slender support structures.

Matha, D.; Schlipf, M.; Cordle, A.; Pereira, R.; Jonkman, J.

2011-10-01T23:59:59.000Z

266

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

267

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

268

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

269

IV. Environmental Impact, Setting, and Mitigation Measures LBNL LRDP EIR IV.G-1 ESA / 201074  

E-Print Network [OSTI]

IV. Environmental Impact, Setting, and Mitigation Measures LBNL LRDP EIR IV.G-1 ESA / 201074 Public discusses existing surface water and groundwater conditions at LBNL and analyzes the potential Setting IV.G.2.1 Hydrologic Setting Surface Water LBNL is situated within Blackberry and Strawberry

Lee, Jason R.

270

Nuclear Magnetic Resonance Studies on Vanadium(IV) Electrolyte...  

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

Magnetic Resonance Studies on Vanadium(IV) Electrolyte Solutions for Vanadium Redox Flow Battery . Nuclear Magnetic Resonance Studies on Vanadium(IV) Electrolyte Solutions for...

271

Generation IV Advanced Nuclear Energy Systems By Jacques Bouchard...  

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

Generation IV Advanced Nuclear Energy Systems By Jacques Bouchard, French Commissariat a l'Energie Atomique, France and Ralph Bennett, Idaho National Laboratory. Generation IV...

272

AIAA Applied Aerodynamics Conference, 7th, Seattle, WA, July 31-Aug. 2, 1989, Technical Papers  

SciTech Connect (OSTI)

The present conference discusses the comparative aerodynamic behavior of half-span and full-span delta wings, TRANAIR applications to engine/airframe integration, a zonal approach to V/STOL vehicle aerodynamics, an aerodynamic analysis of segmented aircraft configurations in high-speed flight, unstructured grid generation and FEM flow solvers, surface grid generation for flowfields using B-spline surfaces, the use of chimera in supersonic viscous calculations for the F-15, and hypersonic vehicle forebody design studies. Also discussed are the aerothermodynamics of projectiles at hypersonic speeds, flow visualization of wing-rock motion in delta wings, vortex interaction over delta wings at high alpha, the analysis and design of dual-rotation propellers, unsteady pressure loads from plunging airfoils, the effects of riblets on the wake of an airfoil, inverse airfoil design with Navier-Stokes methods, flight testing for a 155-mm base-burn projectile, experimental results on rotor/fuselage aerodynamic interactions, the high-alpha aerodynamic characteristics of crescent and elliptic wings, and the effects of free vortices on lifting surfaces.

Not Available

1989-01-01T23:59:59.000Z

273

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

274

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

275

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

276

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

277

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

278

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

279

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

280

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

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

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

282

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.

283

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

284

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

285

Aerodynamic and Performance Measurements on a SWT-2.3-101 Wind Turbine  

SciTech Connect (OSTI)

This paper provides an overview of a detailed wind turbine field experiment being conducted at NREL under U.S. Department of Energy sponsorship. The purpose of the experiment is to obtain knowledge about the aerodynamics, performance, noise emission and structural characteristics of the Siemens SWT-2.3-101 wind turbine.

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

2011-10-01T23:59:59.000Z

286

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

287

A Tour of the Aerodynamic and Hydraulic Research Infrastructure, Department of Engineering, University of Leicester  

E-Print Network [OSTI]

A Tour of the Aerodynamic and Hydraulic Research Infrastructure, Department of Engineering of the experimental facilities that are more relevant to fundamental and applied flow turbine research. The tour-section wind tunnel. This will be followed by a visit to the Hydraulics laboratory, Engineering Tower (13

Gorban, Alexander N.

288

Structural effects of unsteady aerodynamic forces on horizontal-axis wind turbines  

SciTech Connect (OSTI)

Due to its renewable nature and abundant resources, wind energy has the potential to fulfill a large portion of this nation`s energy needs. The simplest means of utilizing wind energy is through the use of downwind, horizontal-axis wind turbines (HAWT) with fixed-pitch rotors. This configuration regulates the peak power by allowing the rotor blade to aerodynamically stall. The stall point, the point of maximum coefficient of lift, is currently predicted using data obtained from wind tunnel tests. Unfortunately, these tests do not accurately simulate conditions encountered in the field. Flow around the tower and nacelle coupled with inflow turbulence and rotation of the turbine blades create unpredicted aerodynamic forces. Dynamic stall is hypothesized to occur. Such aerodynamic loads are transmitted into the rotor and tower causing structural resonance that drastically reduces the design lifetime of the wind turbine. The current method of alleviating this problem is to structurally reinforce the tower and blades. However, this adds unneeded mass and, therefore, cost to the turbines. A better understanding of the aerodynamic forces and the manner in which they affect the structure would allow for the design of more cost effective and durable wind turbines. Data compiled by the National Renewable Energy Laboratory (NREL) for a downwind HAWT with constant chord, untwisted, fixed-pitch rotors is analyzed. From these data, the actual aerodynamic characteristics of the rotor are being portrayed and the potential effects upon the structure can for the first time be fully analyzed. Based upon their understanding, solutions to the problem of structural resonance are emerging.

Miller, M.S.; Shipley, D.E. [Univ. of Colorado, Boulder, CO (United States). BioServe Space Technologies

1994-08-01T23:59:59.000Z

289

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

290

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

291

Industrial Waste Landfill IV upgrade package  

SciTech Connect (OSTI)

The Y-12 Plant, K-25 Site, and ORNL are managed by DOE`s Operating Contractor (OC), Martin Marietta Energy Systems, Inc. (Energy Systems) for DOE. Operation associated with the facilities by the Operating Contractor and subcontractors, DOE contractors and the DOE Federal Building result in the generation of industrial solid wastes as well as construction/demolition wastes. Due to the waste streams mentioned, the Y-12 Industrial Waste Landfill IV (IWLF-IV) was developed for the disposal of solid industrial waste in accordance to Rule 1200-1-7, Regulations Governing Solid Waste Processing and Disposal in Tennessee. This revised operating document is a part of a request for modification to the existing Y-12 IWLF-IV to comply with revised regulation (Rule Chapters 1200-1-7-.01 through 1200-1-7-.08) in order to provide future disposal space for the ORR, Subcontractors, and the DOE Federal Building. This revised operating manual also reflects approved modifications that have been made over the years since the original landfill permit approval. The drawings referred to in this manual are included in Drawings section of the package. IWLF-IV is a Tennessee Department of Environmental and Conservation/Division of Solid Waste Management (TDEC/DSWM) Class 11 disposal unit.

Not Available

1994-03-29T23:59:59.000Z

292

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...

293

APD IV, 22-25 April 2013, NIST Bill David,  

E-Print Network [OSTI]

APD IV, 22-25 April 2013, NIST Bill David, ISIS Facility, Rutherford Appleton Laboratory, UK, 22-25 April 2013, NIST , but... RAL: Diamond & ISIS ISIS TSII Oxford Chemistry Oxford #12;APD IV, 22-ray diffractometer CMS @ CERN CMS @ CERN (II) WISH detectors PILATUS ISIS electronics PILATUS electronics #12;APD IV

Magee, Joseph W.

294

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

295

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

296

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

297

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

298

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

299

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

300

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

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,
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301

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

302

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

303

SECTION IV: ATOMIC AND MOLECULAR SCIENCE  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0 ResourceAwards SAGE Awards ,# , onLightThe nature of theIV:

304

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

305

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

306

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

307

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

308

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...

309

Multipolar corneal-shaping electrode with flexible removable skirt  

DOE Patents [OSTI]

The disclosure relates to a multipolar probe using radiofrequency energy to reshape the cornea of an eye. The surface of the cornea is flushed continuously with a conductive coolant during operation.

Doss, James D. (Los Alamos, NM)

1983-01-01T23:59:59.000Z

310

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

311

Modeling piston skirt lubrication in internal combustion engines  

E-Print Network [OSTI]

Ever-increasing demand for reduction of the undesirable emissions from the internal combustion engines propels broader effort in auto industry to design more fuel efficient engines. One of the major focuses is the reduction ...

Bai, Dongfang, Ph. D. Massachusetts Institute of Technology

2012-01-01T23:59:59.000Z

312

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

313

Modcomp MAX IV System Processors reference guide  

SciTech Connect (OSTI)

A user almost always faces a big problem when having to learn to use a new computer system. The information necessary to use the system is often scattered throughout many different manuals. The user also faces the problem of extracting the information really needed from each manual. Very few computer vendors supply a single Users Guide or even a manual to help the new user locate the necessary manuals. Modcomp is no exception to this, Modcomp MAX IV requires that the user be familiar with the system file usage which adds to the problem. At General Atomics there is an ever increasing need for new users to learn how to use the Modcomp computers. This paper was written to provide a condensed Users Reference Guide'' for Modcomp computer users. This manual should be of value not only to new users but any users that are not Modcomp computer systems experts. This Users Reference Guide'' is intended to provided the basic information for the use of the various Modcomp System Processors necessary to, create, compile, link-edit, and catalog a program. Only the information necessary to provide the user with a basic understanding of the Systems Processors is included. This document provides enough information for the majority of programmers to use the Modcomp computers without having to refer to any other manuals. A lot of emphasis has been placed on the file description and usage for each of the System Processors. This allows the user to understand how Modcomp MAX IV does things rather than just learning the system commands.

Cummings, J.

1990-10-01T23:59:59.000Z

314

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

315

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

316

Aerodynamic pressure and flow-visualization measurement from a rotating wind turbine blade  

SciTech Connect (OSTI)

Aerodynamic, load, flow-visualization, and inflow measurements have been made on a 10-m, three-bladed, downwind, horizontal-axis wind turbine (HAWT). A video camera mounted on the rotor was used to record nighttime and daytime video images of tufts attached to the low-pressure side of a constant-chord, zero-twist blade. Load measurements were made using strain gages mounted at every 10% of the blade's span. Pressure measurements were made at 80% of the blade's span. Pressure taps were located at 32 chordwise positions, revealing pressure distributions comparable with wind tunnel data. Inflow was measured using a vertical-plane array of eight propvane and five triaxial (U-V-W) prop-type anemometers located 10 m upwind in the predominant wind direction. One objective of this comprehensive research program was to study the effects of blade rotation on aerodynamic behavior below, near, and beyond stall. To this end, flow patterns are presented here that reveal the dynamic and steady behavior of flow conditions on the blade. Pressure distributions are compared to flow patterns and two-dimensional wind tunnel data. Separation boundary locations are shown that change as a function of spanwise location, pitch angle, and wind speed. 6 refs., 23 figs., 1 tab.

Butterfield, C.P.

1988-11-01T23:59:59.000Z

317

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

318

MOOS-IvP Autonomy Tools Users Manual  

E-Print Network [OSTI]

This document describes fifteen MOOS-IvP autonomy tools. uHelmScope provides a run-time scoping window into the state of an active IvP Helm executing its mission. pMarineViewer is a geo-based GUI tool for rendering marine ...

Benjamin, Michael R.

2010-08-23T23:59:59.000Z

319

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

320

CMAD IV 11/14/96 Information Security  

E-Print Network [OSTI]

utilities, power pools, vendors etc.. #12;CMAD IV 11/14/96 #12; #12; GridCo LineCo PoolCo Energy Merchant INFO INFO INFO $ $ $ PWR PWR PWR #12;CMAD IV 11/14/96 "Future" Is At Hand · Federal Energy Regulatory protection and audit practices inadequate. · Internal priorities limiting attention to security concerns

California at Davis, University of

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

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

322

Subunit IV-PetL chimeras in cytochrome b6f complex Chimeric fusions of subunit IV and PetL in the b6 f complex of  

E-Print Network [OSTI]

Subunit IV-PetL chimeras in cytochrome b6f complex - 1 - Chimeric fusions of subunit IV and Pet IV-PetL chimeras in cytochrome b6 f complex Additional keywords : PetG, PetM, PetN, transmembrane topology, mass spectrometry, State Transitions, protein phosphorylation. #12;Subunit IV-PetL chimeras

323

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

324

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

325

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

326

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

327

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

328

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...

329

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

330

Analise Matematica IV Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica  

E-Print Network [OSTI]

An´alise Matem´atica IV Eng. Ambiente, Eng. Biol´ogica, Eng. Qu´imica, Qu´imica 1o ¯ Semestre -- 31

Dias, Esmeralda Sousa

331

Analise Matematica IV Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica  

E-Print Network [OSTI]

An´alise Matem´atica IV Eng. Ambiente, Eng. Biol´ogica, Eng. Qu´imica, Qu´imica 1o ¯ Semestre -- 27

Dias, Esmeralda Sousa

332

Analise Matematica IV Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica  

E-Print Network [OSTI]

An´alise Matem´atica IV Eng. Ambiente, Eng. Biol´ogica, Eng. Qu´imica, Qu´imica 2o ¯ Semestre -- 28

Dias, Esmeralda Sousa

333

Analise Matematica IV Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica  

E-Print Network [OSTI]

An´alise Matem´atica IV Eng. Ambiente, Eng. Biol´ogica, Eng. Qu´imica, Qu´imica 1o ¯ Semestre -- 6

Dias, Esmeralda Sousa

334

action phase iv: Topics by E-print Network  

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

on all fields of N4 vector multiplet. We also consider the derivation of leading low-enrgy effective action at two loops. I. L. Buchbinder 2004-02-12 256 Painleve IV and...

335

Cotton responses to mepiquat chloride and PGR-IV treatments  

E-Print Network [OSTI]

Plant growth regulators (PGRS) are applied to cotton (Gossypium hirsutum L.) to control vegetative growth, increase yields and hasten maturity. Two of these PGRS, mepiquat chloride (MC) and PGR-IV, affect plant growth in different ways. MC inhibits...

Biles, Stephen Paul

1998-01-01T23:59:59.000Z

336

Annex IV Environmental Webinar: Effects of Energy Removal on...  

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

on Physical Systems. Held under the auspices of the Annex IV initiative to the IEA Ocean Energy Systems, the webinar will be on February 3, 2015, from 8:00 to 9:30 AM PST...

337

Test, Evaluation, and Demonstration of Practical Devices/Systems to Reduce Aerodynamic Drag of Tractor/Semitrailer Combination Unit Trucks  

SciTech Connect (OSTI)

Class 8 heavy-duty trucks account for over three-quarters of the total diesel fuel used by commercial trucks (trucks with GVWRs more than 10,000 pounds) in the United States each year. At the highway speeds at which these trucks travel (i.e., 60 mph or greater), aerodynamic drag is a major part of total horsepower needed to move the truck down the highway, Reductions in aerodynamic drag can yield measurable benefits in fuel economy through the use of relatively inexpensive and simple devices. The goal of this project was to examine a number of aerodynamic drag reduction devices and systems and determine their effectiveness in reducing aerodynamic drag of Class 8 tractor/semitrailer combination-units, thus contributing to DOE's goal of reducing transportation petroleum use. The project team included major heavy truck manufacturers in the United States, along with the management and industry expertise of the Truck Manufacturers Association as the lead investigative organization. The Truck Manufacturers Association (TMA) is the national trade association representing the major North American manufacturers of Class 6-8 trucks (GVWRs over 19,500 lbs). Four major truck manufacturers participated in this project with TMA: Freightliner LLC; International Truck and Engine Corporation; Mack Trucks Inc.; and Volvo Trucks North America, Inc. Together, these manufacturers represent over three-quarters of total Class 8 truck sales in the United States. These four manufacturers pursued complementary research efforts as part of this project. The project work was separated into two phases conducted over a two-year period. In Phase I, candidate aerodynamic devices and systems were screened to focus research and development attention on devices that offered the most potential. This was accomplished using full-size vehicle tests, scale model tests, and computational fluid dynamics analyses. In Phase II, the most promising devices were installed on full-size trucks and their effect on fuel economy was determined, either through on-road testing or full-size wind tunnel testing. All of the manufacturers worked with devices and systems that offer practical solutions to reduce aerodynamic drag, accounting for functionality, durability, cost effectiveness, reliability, and maintainability. The project team members and their roles and responsibilities are shown in Figure 2-1. Figure 2-2 shows the Phase I and II project schedules for all four projects and associated management activities.

Scott Smith; Karla Younessi; Matt Markstaller; Dan Schlesinger; Bhaskar Bhatnagar; Donald Smith; Bruno Banceu; Ron Schoon; V.K. Sharma; Mark Kachmarsky; Srikant Ghantae; Michael Sorrels; Conal Deedy; Justin Clark; Skip Yeakel; Michael D. Laughlin; Charlotte Seigler; Sidney Diamond

2007-04-30T23:59:59.000Z

338

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

339

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

340

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

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

Endonuclease IV of Escherichia coli is induced by paraquat  

SciTech Connect (OSTI)

The addition of paraquat (methyl viologen) to a growing culture of Escherichia coli K-12 led within 1 hr to a 10- to 20-fold increase in the level of endonuclease IV, a DNase for apurinic/apyrimidinic sites. The induction was blocked by chloramphenicol. Increases of 3-fold or more were also seen with plumbagin, menadione, and phenazine methosulfate. H/sub 2/O/sub 2/ produced no more than a 2-fold increase in endonuclease IV activity. The following agents had no significant effect: streptonigrin, nitrofurantoin, tert-butyl hydroperoxide, ..gamma.. rays, 260-nm UV radiation, methyl methanesulfonate, mitomycin C, and ascorbate. Paraquat, plumbagin, menadione, and phenazine methosulfate are known to generate superoxide radical anions via redox cycling in vivo. A mutant lacking superoxide dismutase was unusually sensitive to induction by paraquat. In addition, endonuclease IV could be induced by merely growing the mutant in pure O/sub 2/. The levels of endonuclease IV in uninduced or paraquat-treated cells were unaffected by mutations of oxyR, a H/sub 2/O/sub 2/-inducible gene that governs an oxidative-stress regulon. The results indicate that endonuclease IV is an inducible DNA-repair enzyme and that its induction can be mediated via the production of superoxide radicals.

Chan, E.; Weiss, B.

1987-05-01T23:59:59.000Z

342

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

SciTech Connect (OSTI)

Post processing techniques for aerodynamic data acquired from a Siemens SWT-2.3101 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 Computational Fluid Dynamics (CFD) results. The dynamic stall event was seen to significantly delay the stall. Furthermore, the non-dimensionalized 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. R.; Fingersh, L.; Schreck, S.

2012-01-01T23:59:59.000Z

343

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

344

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

345

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

346

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

347

International Conference on Mechanical Engineering, December 26-28, 2001, Dhaka, Bangladesh/pp. IV 37-40 Section IV: Fluid Mechanics 37  

E-Print Network [OSTI]

/pp. IV 37-40 Section IV: Fluid Mechanics 37 ROLES OF PRESSURE AND FLOW RATE IN DEFINING THE RADIUS-28 Section IV: Fluid Mechanics 38 Hurst et al. (1961) introduced a radius of drainage formula. This formula4th International Conference on Mechanical Engineering, December 26-28, 2001, Dhaka, Bangladesh

Hossain, M. Enamul

348

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

349

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

350

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

351

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

352

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

353

UNIVERSITE MONTESQUIEU BORDEAUX IV ECOLE DOCTORALE de SCIENCES ECONOMIQUES, GESTION  

E-Print Network [OSTI]

PLANIFICATION URBAINE SUR LES PRIX IMMOBILIERS ET FONCIERS EN ZONE LITTORALE : LE CAS DU BASSIN D'ARCACHON ThèseUNIVERSITE MONTESQUIEU ­ BORDEAUX IV ECOLE DOCTORALE de SCIENCES ECONOMIQUES, GESTION ET professionnalisme dans la gestion administrative. Un grand merci à Sébastien Lavaud pour son énorme patience face à

Paris-Sud XI, Université de

354

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

355

Constraints to Stop Deforestation FB IV Informatik, Universitat Trier,  

E-Print Network [OSTI]

Constraints to Stop Deforestation H. Seidl FB IV ­ Informatik, Universit¨at Trier, D­54286 Trier, Universitetsparken 1, DK­2100 Copenhagen �, Denmark. rambo@diku.dk Abstract Wadler's deforestation algorithm, deforestation must terminate on all programs. Several techniques exist to ensure termination of de­ forestation

Seidl, Helmut

356

Constraints to Stop HigherOrder Deforestation FB IV Informatik  

E-Print Network [OSTI]

Constraints to Stop Higher­Order Deforestation H. Seidl FB IV ­ Informatik Universit¨at Trier, D of Copenhagen Universitetsparken 1, DK­2100 Copenhagen �, Denmark rambo@diku.dk Abstract Wadler's deforestation in a compiler, it must terminate on all programs. Several techniques to ensure termi­ nation of deforestation

Seidl, Helmut

357

221B Lecture Notes Quantum Field Theory IV (Radiation Field)  

E-Print Network [OSTI]

221B Lecture Notes Quantum Field Theory IV (Radiation Field) 1 Quantization of Radiation Field Early development of quantum mechanics was led by the fact that electro- magnetic radiation (electric current den- sity) jµ = (, j/c). For a point particle of charge e, the charge density is = e

Murayama, Hitoshi

358

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

359

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

360

Oxidative Reforming of Biodiesel Over Molybdenum (IV) Oxide  

E-Print Network [OSTI]

Oxidative Reforming of Biodiesel Over Molybdenum (IV) Oxide Jessica Whalen, Oscar Marin Flores, Su University INTRODUCTION Energy consumption continues to skyrocket worldwide. Biodiesel is a renewable fuel as potential feedstock in solid oxide fuel cells. Petroleum based fuels become scarcer daily, and biodiesel

Collins, Gary S.

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

Baeyer-Villiger Oxidation over Sn(IV) Phosphonates  

E-Print Network [OSTI]

attractive feature of these catalysts is that the reaction can be carried out under solvent-free conditions using aqueous H2O2 (30 %) as the oxidant. Various Sn(IV) phosphonates have been synthesized using phosphonic acid in different solvent systems...

Samarajeeewa, Sandani

2008-08-19T23:59:59.000Z

362

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

363

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...

364

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...

365

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

E-Print Network [OSTI]

COMPUTATIONS OF NUCLEAR RESPONSE FUNCTIONS WITH MACK-IV M. A. Abdou and Y. Gohar Ttm ttpait * i OF NUCLEAR RESPONSE FUNCTIONS WITH MACK-IV M. A. Abdou and Y. Gohar APPLIED PHYSICS DIVISION, ARGONNE

Abdou, Mohamed

366

The effects of heat transfer on the aerodynamic characteristics of a hot wing  

E-Print Network [OSTI]

&'? (13) Noir! trl' rmoiilentu!"I eclila ti orl cail 0 &&rl L" e'n as o2, . . . ?2. ?, o ?dul - liP ? I. ? a'( a SY (la) LIS r 9 tile equatin 1 of state irl the for!'s P. &r I P i ty &an bc r . Ciotve&I exp I icti y Fran tho i& oriantuni...7!1!! EFF!tCT. OF II OV! '!!Ct'iV, S( . ;I! O~( 'I HE AEROOV I'IAi~l!C CF!AI(FACTEA! ST I CS 0, A t'. Gi yi I (IG A I I, ;-t= i s I. , y OOF;I !II Ct" , EE I'?CI(A IlAST:. "t OF S' "Et!CE ! nFi-. CPS IV 4Fl~ I ' IOs?ISFFR Old T!~L A', n...

Macha, John Michael

1972-01-01T23:59:59.000Z

367

A COMPARISON OF BKY-FTN4 AND VAX-FORTRAN IV-PLUS  

E-Print Network [OSTI]

a statement label. name block sn lJ VAX-FORTRAN IV-Plus sneestat fn type 'L~ VAX-FORTRAN IV-Plus the label of anskip a line- Separator VAX-FORTRAN IV-Plus 4.0 Description

Horne, Christopher

2011-01-01T23:59:59.000Z

368

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

369

Influence of addition order and contact time on thorium (IV) retention by hematite in the presence  

E-Print Network [OSTI]

1 Influence of addition order and contact time on thorium (IV) retention by hematite.reiller@cea.fr The influence of addition order and contact time in the system hematite (-Fe2O3) ­ humic acid (HA) ­ thorium (IV) was studied in batch experiments. Thorium (IV) is considered here as a chemical analogue of other actinides

Paris-Sud XI, Université de

370

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

371

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

372

Method of synthesis of anhydrous thorium(IV) complexes  

SciTech Connect (OSTI)

Method of producing anhydrous thorium(IV) tetrahalide complexes, utilizing Th(NO.sub.3).sub.4(H.sub.2O).sub.x, where x is at least 4, as a reagent; method of producing thorium-containing complexes utilizing ThCl.sub.4(DME).sub.2 as a precursor; method of producing purified ThCl.sub.4(ligand).sub.x compounds, where x is from 2 to 9; and novel compounds having the structures: ##STR00001##

Kiplinger, Jaqueline L; Cantat, Thibault

2013-04-30T23:59:59.000Z

373

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

374

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

375

The structure of molten CaSiO3: A neutron diffraction isotope substitution and aerodynamic levitation study.  

SciTech Connect (OSTI)

We have performed neutron diffraction isotopic substitution experiments on aerodynamically levitated droplets of CaSiO3, to directly extract intermediate and local structural information on the Ca environment. The results show a substantial broadening of the Ca-O peak in the pair distribution function of the melt compared to the glass, which comprises primarily of 6- and 7-fold coordinated Ca-polyhedra. The broadening can be explained by a re-distribution of Ca-O bond lengths, especially towards longer distances in the liquid. The first order neutron difference function provides a rigorous test of recent molecular dynamics simulations and supports the model of the presence of short chains or channels of edge shared Ca-octahedra in the liquid state. It is suggested that the polymerization of Ca-polyhedra is responsible for the fragile viscosity behavior of the melt and the glass forming ability in CaSiO3.

Skinner, Lawrie [State University of New York, Stony Brook; Benmore, Chris J [Argonne National Laboratory (ANL); Weber, Richard [Argonne National Laboratory (ANL); Santodonato, Louis J [ORNL; Tumber, Sonia [Materials Development, Inc., Evanston, IL; Neuefeind, Joerg C [ORNL; Lazareva, Lena [State University of New York, Stony Brook; Du, Jincheng [University of North Texas; Parise, John B [Stony Brook University (SUNY)

2012-01-01T23:59:59.000Z

376

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

377

TOTAL SES SL EJ//EK EN IV EN III  

National Nuclear Security Administration (NNSA)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartmentNationalRestart of the Reviewwill help prepare local studentsEJ/EK EN V EN IV EN

378

Relativistic Modeling of Quark Stars with Tolman IV Type Potential  

E-Print Network [OSTI]

In this paper, we studied the behavior of relativistic objects with anisotropic matter distribution considering Tolman IV form for the gravitational potential Z. The equation of state presents a quadratic relation between the energy density and the radial pressure. New exact solutions of the Einstein-Maxwell system are generated. A physical analysis of electromagnetic field indicates that is regular in the origin and well behaved. We show as the presence of an electrical field modifies the energy density, the radial pressure and the mass of the stellar object and generates a singular charge density.

Malaver, Manuel

2015-01-01T23:59:59.000Z

379

Victory Gardens Phase IV Wind Farm I | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160 East 300 South Place: Salt Lake City, UtahResources/FullGarden Wind Farm I JumpIV

380

Medicine Bow Wind Farm IV | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalwayHydrothermalMcFarland isDiscoveries Inc JumpIV Facility

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

Ridgetop Energy Wind Farm IV | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-g Grant ofRichardton Abbey Wind Farm Jump to:Sector Wind energyIV

382

Table IV: Technical Targets for Membranes: Stationary | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of Energy StrainClient updateTRI-STATE GENERATION AND|Energy IV:

383

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

384

Analysis of cadmium in undissolved anode materials of Mark-IV electro-refiner  

SciTech Connect (OSTI)

The Mark-IV electro-refiner (Mk-IV ER) is a unit process in the FCF (Fuel Conditioning Facility), which is primarily assigned to treating the used driver fuels. Mk-IV ER contains an electrolyte/molten cadmium system for refining uranium electrochemically. Typically, the anode of the Mk-IV ER consists of the chopped sodium-bonded metallic driver fuels, which have been primarily U-10Zr binary fuels. Chemical analysis of the residual anode materials after electrorefining indicates that a small amount of cadmium is removed from the Mk-IV ER along with the undissolved anode materials. Investigation of chemical analysis data indicates that the amount of cadmium in the undissolved anode materials is strongly correlated with the anode rotation speeds and the residence time of the anode in the Mk-IV ER. Discussions are given to explain the prescribed correlation. (authors)

Yoo, Tae-Sic; Fredrickson, G.L.; Vaden, D.; Westphal, B. [Separation Department, Materials and Fuels Complex, Idaho National Laboratory, Idaho Falls, ID (United States)

2013-07-01T23:59:59.000Z

385

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...

386

Technical Session IV Talks | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

IV Talks Scientific User Facilities (SUF) Division SUF Home About User Facilities Projects Accelerator & Detector Research Science Highlights Principal Investigators' Meetings BES...

387

Analise Matematica IV Licenciaturas: Eng. Ambiente, Eng. Biologica, Eng. Quimica, Quimica  

E-Print Network [OSTI]

An´alise Matem´atica IV Licenciaturas: Eng. Ambiente, Eng. Biol´ogica, Eng. Qu´imica, Qu´imica 2o

Dias, Esmeralda Sousa

388

Generation-IV Roadmap Report of the Fuel Cycle Crosscut Group...  

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

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...

389

What controls the C IV line profile in active galactic nuclei?  

E-Print Network [OSTI]

The high ionization lines in active galactic nuclei (AGN), such as C IV, tend to be blueshifted with respect to the lower ionization lines, such as H beta, and often show a strong blue excess asymmetry not seen in the low ionization lines. There is accumulating evidence that the H beta profile is dominated by gravity, and thus provides a useful estimate of the black hole mass in AGN. The shift and asymmetry commonly seen in C IV suggest that non gravitational effects, such as obscuration and radiation pressure, may affect the line profile. We explore the relation between the H beta and C IV profiles using UV spectra available for 81 of the 87 z 4000 km/s. This argues against the view that C IV generally originates closer to the center, compared to H beta. (3) C IV appears to provide a significantly less accurate, and possibly biased estimate of the black hole mass in AGN, compared with H beta. (4) All objects where C IV is strongly blueshifted and asymmetric have a high L/L_Edd, but the reverse is not true. This suggests that a high L/L_Edd is a necessary but not sufficient condition for generating a blueshifted asymmetric C IV emission. (5) We also find indications for dust reddening and scattering in `normal' AGN. In particular, PG quasars with a redder optical-UV continuum slope show weaker C IV emission, stronger C IV absorption, and a higher optical continuum polarization.

Alexei Baskin; Ari Laor

2004-09-08T23:59:59.000Z

390

CRYSTAL AND MOLECULAR STRUCTURE OF HYDRIDOTIS (BIS(TRIMETHYLSILYL)AMIDO]URANIUM(IV)  

E-Print Network [OSTI]

Chemistry CRYSTAL AND MOLECULAR STRUCTURE OF HYDRIDOTRIS[BIS(TRIMETHYLSILYL)AMIDO]URANIUM(Chemistry University of California Berkeley, California 94720 New hydride derivatives of thorium (IV) and uranium (

Andersen, Richard A.

2012-01-01T23:59:59.000Z

391

TASS Mark IV Photometric Survey of the Northern Sky  

E-Print Network [OSTI]

The Amateur Sky Survey (TASS) is a loose confederation of amateur and professional astronomers. We describe the design and construction of our Mark IV systems, a set of wide-field telescopes with CCD cameras which take simultaneous images in the $V$ and $I_C$ passbands. We explain our observational procedures and the pipeline which processes and reduces the images into lists of stellar positions and magnitudes. We have compiled a large database of measurements for stars in the northern celestial hemisphere with $V$-band magnitudes in the range 7 < V < 13. This paper describes data taken over the four-year period starting November, 2001. One of our results is a catalog of repeated measurements on the Johnson-Cousins system for over 4.3 million stars.

Thomas F. Droege; Michael W. Richmond; Michael P. Sallman; Robert P. Creager

2006-10-17T23:59:59.000Z

392

Unexpected formation of a trinuclear complex containing a Ta(IV)-Ta(IV) bond in the reactions of ButN=Ta(NMe2)3 with silanes  

SciTech Connect (OSTI)

A new trinuclear species containing a Ta(IV)-Ta(IV) bond, Ta{sub 3}({mu}-H)({mu}-NMe{sub 2})({mu}NBu{sup t}){sub 2}(NBu{sup t})(NMe{sub 2}){sub 5}, has been formed by reductive elimination of H{sub 2}. Ta{sub 2}H{sub 2}({mu}-NMe{sub 2}){sub 2}(NMe{sub 2}){sub 2}(NBu{sup t}){sub 2} has also been isolated. O{sub 2} oxidizes the Ta(IV)-Ta(IV) bond to yield Ta{sub 3}({mu}{sub 3}-O)(H)({mu}NBu{sup t})({mu}-NMe{sub 2}){sub 2}(NMe{sub 2}){sub 4}(NBu{sup t}){sub 2} under ligand exchange. Delocalization of d electrons is discussed.

Cheng, Shu-Jian [University of Tennessee, Knoxville (UTK); Dougan, Brenda A. [University of Tennessee, Knoxville (UTK); Steren, Carlos A. [University of Tennessee, Knoxville (UTK); Wang, Xiaoping [ORNL; Chen, Xue-Tai [University of Tennessee, Knoxville (UTK); Lin, Zhenyang [University of Tennessee, Knoxville (UTK); Xue, Zi-Ling [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

393

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

394

COBRA-IV PC: A personal computer version of COBRA-IV-I for thermal-hydraulic analysis of rod bundle nuclear fuel elements and cores  

SciTech Connect (OSTI)

COBRA-IV PC is a modified version of COBRA-IV-I, adapted for use with most IBM PC and PC-compatible desktop computers. Like COBRA-IV-I, COBRA-IV PC uses the subchannel analysis approach to determine the enthalpy and flow distribution in rod bundles for both steady-state and transient conditions. The steady-state and transient solution schemes used in COBRA-IIIC are still available in COBRA-IV PC as the implicit solution scheme option. An explicit solution scheme is also available, allowing the calculation of severe transients involving flow reversals, recirculations, expulsions, and reentry flows, with a pressure or flow boundary condition specified. In addition, several modifications have been incorporated into COBRA-IV PC to allow the code to run on the PC. These include a reduction in the array dimensions, the removal of the dump and restart options, and the inclusion of several code modifications by Oregon State University, most notably, a critical heat flux correlation for boiling water reactor fuel and a new solution scheme for cross-flow distribution calculations. 7 refs., 8 figs., 1 tab.

Webb, B.J.

1988-01-01T23:59:59.000Z

395

MOOS-IvP Autonomy Tools Users Manual Release 4.2.1  

E-Print Network [OSTI]

This document describes 19 MOOS-IvP autonomy tools. uHelmScope provides a run-time scoping window into the state of an active IvP Helm executing its mission. pMarineViewer is a geo-based GUI tool for rendering marine ...

Benjamin, Michael R.

2011-07-28T23:59:59.000Z

396

CAMIRD III: Computer Assisted Medical Internal Radiation Dosimetry. FORTRAN IV version  

SciTech Connect (OSTI)

This paper desribes the FORTRAN IV version of the P.A. Feller's CAMIRD/II Package (1) revised. In addition another FORTRAN IV program named TILDY (2), which determines the cumulated activity, has been revised and modified to be used as a subroutine of CAMIRD's main program. With such an organization all the calculation involved in dose computation becomes easier and quicker.

Bellina, C. R.; Guzzardi, R.

1980-01-01T23:59:59.000Z

397

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

398

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

399

Critical evaluation of PASSER IV: a progression-based network signal timing program  

E-Print Network [OSTI]

. TRANSYT-7F showed less delay than PASSER 11 or PASSER IV in case of total intersection delay especially for runs having larger cycle lengths. PASSER IV proved to be an excellent tool for arterial progression when compared to PASSER 11. The green splits...

Chada, Shireen Reddy

1994-01-01T23:59:59.000Z

400

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

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

Analysis of Cadmium in Undissolved Anode Materials of Mark-IV Electrorefiner  

SciTech Connect (OSTI)

The Mark-IV electrorefiner (Mk-IV ER) contains an electrolyte/molten cadmium system for refining uranium electrochemically. Typically, the anode of the Mk-IV ER consists of the chopped sodium-bonded metallic driver fuels, which have been primarily U-10Zr binary fuels. Chemical analysis of the residual anode materials after electrorefining indicates that a small amount of cadmium is removed from the Mk-IV ER along with the undissolved anode materials. Investigation of chemical analysis data indicates that the amount of cadmium in the undissolved anode materials is strongly correlated with the anode rotation speeds and the residence time of the anode in the Mk-IV ER. Discussions are given to explain the prescribed correlation.

Tae-Sic Yoo; Guy L. Fredrickson; DeeEarl Vaden; Brian R. Westphal

2013-10-01T23:59:59.000Z

402

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

403

The SMC Complex MukBEF Recruits Topoisomerase IV to the Origin of Replication Region in Live Escherichia coli  

E-Print Network [OSTI]

The Escherichia coli structural maintenance of chromosome (SMC) complex, MukBEF, and topoisomerase IV (TopoIV) interact in vitro through a direct contact between the MukB dimerization hinge and the C-terminal domain of ...

Nicolas, Emilien

404

Selection of Correlations and Look-Up Tables for Critical Heat Flux Prediction in the Generation IV "IRIS" Reactor  

E-Print Network [OSTI]

In order to fulfill the goals set forth by the Generation IV International Forum, the current NERI funded

Romano, A.

405

Energy modeling IV--planning for energy disruptions  

SciTech Connect (OSTI)

On May 10-12, 1982, the Institute of Gas Technology held the symposium ''Energy Modeling IV: Planning for Energy Disruptions,'' the fourth in a series of energy modeling symposia. Although all four of the energy modeling symposia presented by IGT emphasized new modeling techniques, each had a specific theme. This symposium addressed the role of modeling in dealing with the problems of disruptions in the supply and price of energy. The symposium brought together modelers and planners from federal and state governmental agencies, utilities, management and consulting organizations, and academic institutions. The participants discussed the complex planning problems presented by both gradual and sudden fluctuations in energy supply or price, whether caused by political, physical, economic, or natural events, and the resultant threats to the stability of businesses and the security of nations. A separate abstract was pepared for each paper for the Energy Data Base (EDB); on paper is included in Energy Research Abstracts (ERA) and 22 for Energy Abstracts for Policy Analysis (EAPA).

Feingold, B.W.; Courtney, L. (eds.)

1982-01-01T23:59:59.000Z

406

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

407

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.

408

Venezuela-MEM/USA-DOE Fossil Energy Report IV-11: Supporting technology for enhanced oil recovery - EOR thermal processes  

SciTech Connect (OSTI)

This report contains the results of efforts under the six tasks of the Tenth Amendment anti Extension of Annex IV, Enhanced Oil Recovery Thermal Processes of the Venezuela/USA Energy Agreement. This report is presented in sections (for each of the six Tasks) and each section contains one or more reports that were prepared to describe the results of the effort under each of the Tasks. A statement of each Task, taken from the Agreement Between Project Managers, is presented on the first page of each section. The Tasks are numbered 68 through 73. The first through tenth report on research performed under Annex IV Venezuela MEM/USA-DOE Fossil Energy Report Number IV-1, IV-2, IV-3, IV-4, IV-5, IV-6, IV-7, IV-8, IV-9, IV-10 contain the results of the first 67 Tasks. These reports are dated April 1983, August 1984, March 1986, July 1987, November 1988, December 1989, October 1991, February 1993, March 1995, and December 1997, respectively.

Venezuela

2000-04-06T23:59:59.000Z

409

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

410

Computational mechanics research and support for aerodynamics and hydraulics at TFHRC, year 2 quarter 2 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 effects 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 improve design allowing for fish passage, modeling of the salt spray transport into bridge girders to address suitability of using weathering steel in bridges, CFD analysis of the operation of the wind tunnel in the TFHRC wind engineering laboratory. This quarterly report documents technical progress on the project tasks for the period of January through March 2012.

Lottes, S.A.; Bojanowski, C.; Shen, J.; Xie, Z.; Zhai, Y. (Energy Systems); (Turner-Fairbank Highway Research Center)

2012-06-28T23:59:59.000Z

411

Computational mechanics research and support for aerodynamics and hydraulics at TFHRC year 1 quarter 4 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 effects 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, CFD analysis of the operation of the wind tunnel in the TFCHR wind engineering laboratory, 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 July through September 2011.

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

2011-12-09T23:59:59.000Z

412

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

413

Computational mechanics research and support for aerodynamics and hydraulics at TFHRC, year 2 quarter 1 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 effects 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 improve design allowing for fish passage, modeling of the salt spray transport into bridge girders to address suitability of using weathering steel in bridges, CFD analysis of the operation of the wind tunnel in the TFHRC wind engineering laboratory. This quarterly report documents technical progress on the project tasks for the period of October through December 2011.

Lottes, S.A.; Bojanowski, C.; Shen, J.; Xie, Z.; Zhai, Y. (Energy Systems); (Turner-Fairbank Highway Research Center)

2012-04-09T23:59:59.000Z

414

New seismological results on the G0 IV eta Bootis  

E-Print Network [OSTI]

Several attempts have been made to detect solar-like oscillations in the G0 IV star eta Boo. We present here new observations on this star simultaneously conducted with two spectrographs: Coralie mounted on the 1.2-m Swiss telescope at the ESO La Silla Observatory (Chile) and Elodie based on the 1.93-m telescope at the Observatoire de Haute Provence (France). In total, 1239 spectra were collected over 13 nights. The power spectrum of the high precision velocity time series clearly presents several identifiable peaks between 0.4 and 1.0 mHz showing regularity with a large and small separations of Delta_nu = 39.9 uHz and delta_nu02 = 3.95 uHz respectively. Twenty-two individual frequencies have been identified. Detailed models based on these measurements and non-asteroseismic observables were computed using the Geneva evolution code including shellular rotation and atomic diffusion. By combining these seismological data with non-asteroseismic observations, we determine the following global parameters for eta Boo: a mass of 1.57 +- 0.07 M_sol, an age t=2.67 +- 0.10 Gyr and an initial metallicity Z/X_i=0.0391 +- 0.0070. We also show that the mass of eta Boo is very sensitive to the choice of the observed metallicity, while the age of eta Boo depends on the input physics used. Indeed, a higher metallicity favours a higher mass, while non-rotating models without overshooting predict a smaller age.

F. Carrier; P. Eggenberger; F. Bouchy

2005-01-13T23:59:59.000Z

415

DEVELOPMENT OF RISK-BASED AND TECHNOLOGY-INDEPENDENT SAFETY CRITERIA FOR GENERATION IV SYSTEMS  

SciTech Connect (OSTI)

This project has developed quantitative safety goals for Generation IV (Gen IV) nuclear energy systems. These safety goals are risk based and technology independent. The foundations for a new approach to risk analysis has been developed, along with a new operational definition of risk. This project has furthered the current state-of-the-art by developing quantitative safety goals for both Gen IV reactors and for the overall Gen IV nuclear fuel cycle. The risk analysis approach developed will quantify performance measures, characterize uncertainty, and address a more comprehensive view of safety as it relates to the overall system. Appropriate safety criteria are necessary to manage risk in a prudent and cost-effective manner. This study is also important for government agencies responsible for managing, reviewing, and for approving advanced reactor systems because they are charged with assuring the health and safety of the public.

William E. Kastenberg; Edward Blandford; Lance Kim

2009-03-31T23:59:59.000Z

416

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...

417

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

418

Feasibility of risk-informed regulation for Generation-IV reactors  

E-Print Network [OSTI]

With the advent of new and innovative Generation-IV reactor designs, new regulations must be developed to assure the safety of these plants. In the past a purely deterministic way of developing design basis accidents was ...

Matos, Craig H

2005-01-01T23:59:59.000Z

419

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

420

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.

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

Stark broadening of B IV lines for astrophysical and laboratory plasma research  

E-Print Network [OSTI]

Stark broadening parameters for 36 multiplets of B IV have been calculated using the semi-classical perturbation formalism. Obtained results have been used to investigate the regularities within spectral series and temperature dependence.

Dimitrijevi?, Milan S; Simi?, Zoran; Kova?evi?, Andjelka; Sahal-Bréchot, Sylvie

2013-01-01T23:59:59.000Z

422

A Virtual Reality Framework to Optimize Design, Operation and Refueling of GEN-IV Reactors.  

SciTech Connect (OSTI)

many GEN-IV candidate designs are currently under investigation. Technical issues related to material, safety and economics are being addressed at research laboratories, industry and in academia. After safety, economic feasibility is likely to be the most important crterion in the success of GEN-IV design(s). Lessons learned from the designers and operators of GEN-II (and GEN-III) reactors must play a vital role in achieving both safety and economic feasibility goals.

Rizwan-uddin; Nick Karancevic; Stefano Markidis; Joel Dixon; Cheng Luo; Jared Reynolds

2008-04-23T23:59:59.000Z

423

On the origin of the C IV Baldwin effect in AGN  

E-Print Network [OSTI]

The origin of the luminosity dependence of the equivalent width (EW) of broad emission lines in AGN (the Baldwin effect) is not firmly established yet. We explore this question for the broad C IV \\lambda 1549 line using the Boroson & Green sample of the 87 z < 0.5 Bright Quasar Survey (BQS) quasars. Useful UV spectra of the C IV region are available for 81 of the objects, which are used to explore the dependence of the C IV EW on various emission properties. We confirm earlier results on the strong correlations of the C IV EW with some of the emission parameters which define the Boroson & Green Eigenvector 1, and with the optical to X-ray slope \\alpha_ox. In addition, we find a strong correlation of the C IV EW with the relative accretion rate, L/L_Edd. Since L/L_Edd drives some of the Eigenvector 1 correlations, it may be the primary physical parameter which drives the Baldwin effect for C IV.

Alexei Baskin; Ari Laor

2004-03-16T23:59:59.000Z

424

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

425

Sandia National Laboratories: aerodynamics  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1development Sandia, NREL Release Wave EnergyLinksZpartsmicrogrid system New

426

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

427

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

428

Thorium nanochemistry: the solution structure of the Th(IV)?hydroxo pentamer  

SciTech Connect (OSTI)

Tetravalent thorium exhibits a strong tendency towards hydrolysis and subsequent polymerization. Polymeric species play a crucial role in understanding thorium solution chemistry, since their presence causes apparent solubility several orders of magnitude higher than predicted by thermodynamic data bases. Although electrospray mass spectrometry (ESI MS) identifies Th(IV) dimers and pentamers unequivocally as dominant species close to the solubility limit, the molecular structure of Th{sub 5}(OH){sub y} polymers was hitherto unknown. In the present study, X-ray absorption fine structure (XAFS) spectroscopy, high energy X-ray scattering (HEXS) measurements, and quantum chemical calculations are combined to solve the pentamer structure. The most favourable structure is represented by two Th(IV) dimers linked by a central Th(IV) cation through hydroxide bridges.

Walther, Clemens; Rothe, Jörg; Schimmelpfennig, Bernd; Fuss, Markus (Karlsruher)

2012-10-10T23:59:59.000Z

429

A Technology Roadmap for Generation IV Nuclear Energy Systems Executive Summary  

SciTech Connect (OSTI)

To meet future energy needs, ten countries--Argentina, Brazil, Canada, France, Japan, the Republic of Korea, the Republic of South Africa, Switzerland, the United Kingdom, and the United States--have agreed on a framework for international cooperation in research for an advanced generation of nuclear energy systems, known as Generation IV. These ten countries have joined together to form the Generation IV International Forum (GIF) to develop future-generation nuclear energy systems that can be licensed, constructed, and operated in a manner that will provide competitively priced and reliable energy products while satisfactorily addressing nuclear safety, waste, proliferation, and public perception concerns. The objective for Generation IV nuclear energy systems is to be available for international deployment before the year 2030, when many of the world's currently operating nuclear power plants will be at or near the end of their operating licenses.

None

2003-03-01T23:59:59.000Z

430

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

431

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

432

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.

433

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

434

A comparison of spanwise aerodynamic loads estimated from measured bending moments versus direct pressure measurements on horizontal axis wind turbine blades  

SciTech Connect (OSTI)

Two methods can be used to determine aerodynamic loads on a rotating wind turbine blade. The first is to make direct pressure measurements on the blade surface. This is a difficult process requiring costly pressure instrumentation. The second method uses measured flap bending moments in conjunction with analytical techniques to estimate airloads. This method, called ALEST, was originally developed for use on helicopter rotors and was modified for use on horizontal axis wind turbine blades. Estimating airloads using flap bending moments in much simpler and less costly because measurements can be made with conventional strain gages and equipment. This paper presents results of airload estimates obtained using both methods under a variety of operating conditions. Insights on the limitations and usefulness of the ALEST bending moment technique are also included. 10 refs., 6 figs.

Simms, D A; Butterfield, C P

1991-10-01T23:59:59.000Z

435

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

436

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

437

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

438

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

439

Chair of Information Systems IV (ERIS) Institute for Enterprise Systems (InES)  

E-Print Network [OSTI]

workarounds to fulfill daily tasks. Security concept for Enterprise Systems processing business critical data:Master Team Project: Adaptive Usage Control in Enterprise Systems Chair of Information Systems IV (Enterprise Definition and Motivation The Security Evolution Towards a Central Usage Control Policy Hub The Project

Mannheim, Universität

440

Generation IV Nuclear Energy Systems Ten-Year Program Plan Fiscal Year 2005, Volume 1  

SciTech Connect (OSTI)

As reflected in the U.S. ''National Energy Policy'', nuclear energy has a strong role to play in satisfying our nation's future energy security and environmental quality needs. The desirable environmental, economic, and sustainability attributes of nuclear energy give it a cornerstone position, not only in the U.S. energy portfolio, but also in the world's future energy portfolio. Accordingly, on September 20, 2002, U.S. Energy Secretary Spencer Abraham announced that, ''The United States and nine other countries have agreed to develop six Generation IV nuclear energy concepts''. The Secretary also noted that the systems are expected to ''represent significant advances in economics, safety, reliability, proliferation resistance, and waste minimization''. The six systems and their broad, worldwide research and development (R&D) needs are described in ''A Technology Roadmap for Generation IV Nuclear Energy Systems'' (hereafter referred to as the Generation IV Roadmap). The first 10 years of required U.S. R&D contributions to achieve the goals described in the Generation IV Roadmap are outlined in this Program Plan.

None

2005-03-01T23:59:59.000Z

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.


441

Role of type IV secretion systems in trafficking of virulence determinants of Burkholderia cenocepacia  

E-Print Network [OSTI]

protein effector (PtwE1) that is cytotoxic to plant cells. It was also determined that the positively charged C-terminal region of PtwE1 is important for translocation via the Ptw type IV secretion system. Strains of the epidemic B. cenocepacia PHDC...

Engledow, Amanda Suzanne

2009-06-02T23:59:59.000Z

442

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

443

Part IV: Other International Arrangements of Interest Food and Agriculture Organization of the United Nations (FAO)  

E-Print Network [OSTI]

Part IV: Other International Arrangements of Interest 176 Food and Agriculture Organization of the United Nations (FAO) Committee on Fisheries (COFI) FAO The Food and Agriculture Organization (FAO) was founded in October 1945 with a mandate to raise levels of nutrition and standards of living, to improve

444

Challenges in implementing efficient Title IV and Title V permit programs  

SciTech Connect (OSTI)

Integrating title IV acid rain and title V operating permits in an efficient manner poses numerous challenges. Federal rules and policy memos about these programs often conflict or lead to actions that are difficult to implement at best. Both permitting programs are complex and controversial, but the title IV permitting rules are particularly difficult to use and understand. Clear lines of jurisdiction for various aspects of the acid rain program are lacking in some cases, and regulators have been slow to recognize and solve these problems. There are numerous issues that have arisen during the initial stages of developing permits for title IV affected sources. Some have or are being resolved; others remain as potential impediments to efficient permitting. Utah and other western states have been working with the utility industry and US Environmental Protection Agency (EPA) to resolve these and other issues and some problems have been resolved. However, some state and industry officials feel that EPA should take the lead to conduct a series title IV implementation workshops in partnership with states and the utilities. This paper describes solutions to some common implementation problems and identifies challenges that remain to be solved.

Sprott, R. [Utah Division of Air Quality, Salt Lake City, UT (United States)

1997-12-31T23:59:59.000Z

445

OGLE-IV: Fourth Phase of the Optical Gravitational Lensing Experiment  

E-Print Network [OSTI]

We present both the technical overview and main science drivers of the fourth phase of the Optical Gravitational Lensing Experiment (hereafter OGLE-IV). OGLE-IV is currently one of the largest sky variability surveys worldwide, targeting the densest stellar regions of the sky. The survey covers over 3000 square degrees in the sky and monitors regularly over a billion sources. The main targets include the inner Galactic Bulge and the Magellanic System. Their photometry spans the range of $12IV surveys provide photometry with milli-magnitude accuracy at the bright end. The cadence of observations varies from 19-60 minutes in the inner Galactic bulge to 1-3 days in the remaining Galactic bulge fields, Magellanic System and the Galactic disk. OGLE-IV provides the astronomical com...

Udalski, A; Szyma?ski, G

2015-01-01T23:59:59.000Z

446

JOURNALDE PHYSIQUE IV ColloqueC7,supplkmentau Journalde Physique111,Volume 3, novembre 1993  

E-Print Network [OSTI]

-aerospace sectors. Both the advanced high temperature and conventional alloy developments are considered, before.1051/jp4:1993726 #12;JOURNAL DE PHYSIQUE IV \\ TEMPERATURE FOR T.P.S =0.2% IN 100 HRS 400°C 450°C 500% 550 Research Centre in Materials, For High Performance Applications, The University of Birmingham, Birmingham B

Boyer, Edmond

447

Method of removing Pu(IV) polymer from nuclear fuel reclaiming liquid  

DOE Patents [OSTI]

A Pu(IV) polymer not extractable from a nuclear fuel reclaiming solution by conventional processes is electrolytically converted to Pu.sup.3+ and PuO.sub.2.sup.2+ ions which are subsequently converted to Pu.sup.4+ ions extractable by the conventional processes.

Tallent, Othar K. (Oak Ridge, TN); Mailen, James C. (Oak Ridge, TN); Bell, Jimmy T. (Kingston, TN); Arwood, Phillip C. (Harriman, TN)

1982-01-01T23:59:59.000Z

448

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

449

Joint Implementation: Lessons from Title IV's Voluntary Compliance Programs1 by Erica Atkeson  

E-Print Network [OSTI]

' 1990 Clean Air Act Amendments (CAAA), also known as the Acid Rain Program, is the largest public policy-in participants from entering the Acid Rain Program. The differing response to Title IV's two voluntary programs ..................................................................................... 9 3. The United States Acid Rain Program

450

THE NEW MULTICHANNEL RADIOSPECTROGRAPH ARTEMIS-IV/HECATE, OF THE UNIVERSITY OF ATHENS  

E-Print Network [OSTI]

THE NEW MULTICHANNEL RADIOSPECTROGRAPH ARTEMIS-IV/HECATE, OF THE UNIVERSITY OF ATHENS C. CAROUBALOS@cc.uoa.gr (Received 14 April 2000; accepted in revised form 5 February 2001) Abstract. We present the new solar shocks, the acceleration of energetic particles from shock waves, and the relation of energetic electrons

Athens, University of

451

ARTEMIS MARK-IV, THE NEW GREEKFRENCH DIGITAL RADIO SPECTROGRAPH AT THERMOPYLES, GREECE  

E-Print Network [OSTI]

ARTEMIS MARK-IV, THE NEW GREEK­FRENCH DIGITAL RADIO SPECTROGRAPH AT THERMOPYLES, GREECE D. MAROULIS the new digital solar radio spectrograph located at the Thermopyles station, Greece, operated. MAROULIS ET AL. planetary shocks, the acceleration of energetic particles from solar and interplan- etary

Athens, University of

452

IV. STATION CONFIGURATION AND SENSOR COMPARISONS Comparison of solar radiation data gathered at  

E-Print Network [OSTI]

8 IV. STATION CONFIGURATION AND SENSOR COMPARISONS Comparison of solar radiation data gathered of the instruments used to monitor the incident solar radiation. Five types of so- lar sensors and several different data loggers have been used to gather the solar radiation data presented in this data book

Oregon, University of

453

Lectures 7-8 Thurs 23.iv.09 HAS 222d Introduction to energy &  

E-Print Network [OSTI]

Lectures 7-8 Thurs 23.iv.09 HAS 222d Introduction to energy & environment Atmosphere-ocean of mechanical energy into thermal energy (`heat') A cannon barrel is bored from solid iron by a pair of horses of the rising water temperature. This established he equivalence of thermal energy and a known about

454

Updated Generation IV Reactors Integrated Materials Technology Program Plan, Revision 2  

SciTech Connect (OSTI)

The Department of Energy's (DOE's) Generation IV Nuclear Energy Systems Program will address the research and development (R&D) necessary to support next-generation nuclear energy systems. Such R&D will be guided by the technology roadmap developed for the Generation IV International Forum (GIF) over two years with the participation of over 100 experts from the GIF countries. The roadmap evaluated over 100 future systems proposed by researchers around the world. The scope of the R&D described in the roadmap covers the six most promising Generation IV systems. The effort ended in December 2002 with the issue of the final Generation IV Technology Roadmap [1.1]. The six most promising systems identified for next generation nuclear energy are described within the roadmap. Two employ a thermal neutron spectrum with coolants and temperatures that enable hydrogen or electricity production with high efficiency (the Supercritical Water Reactor - SCWR and the Very High Temperature Reactor - VHTR). Three employ a fast neutron spectrum to enable more effective management of actinides through recycling of most components in the discharged fuel (the Gas-cooled Fast Reactor - GFR, the Lead-cooled Fast Reactor - LFR, and the Sodium-cooled Fast Reactor - SFR). The Molten Salt Reactor (MSR) employs a circulating liquid fuel mixture that offers considerable flexibility for recycling actinides, and may provide an alternative to accelerator-driven systems. A few major technologies have been recognized by DOE as necessary to enable the deployment of the next generation of advanced nuclear reactors, including the development and qualification of the structural materials needed to ensure their safe and reliable operation. Accordingly, DOE has identified materials as one of the focus areas for Gen IV technology development.

Corwin, William R [ORNL; Burchell, Timothy D [ORNL; Halsey, William [Lawrence Livermore National Laboratory (LLNL); Hayner, George [Idaho National Laboratory (INL); Katoh, Yutai [ORNL; Klett, James William [ORNL; McGreevy, Timothy E [ORNL; Nanstad, Randy K [ORNL; Ren, Weiju [ORNL; Snead, Lance Lewis [ORNL; Stoller, Roger E [ORNL; Wilson, Dane F [ORNL

2005-12-01T23:59:59.000Z

455

For Continuous Feeding with Pump Using the CORFLO Anti-IV Feeding Tube and Extension SetFor Continuous Feeding with Pump Using the CORFLO Anti-IV Feeding Tube and Extension Set For Gravity Feeding Using the CORFLO Anti-IV Enteral Feeding TubeFor Gravity F  

E-Print Network [OSTI]

1. 3. 4. 5. 2. 5. 6. 7. 6. 7. 3. 4. For Continuous Feeding with Pump Using the CORFLO Anti-IV Feeding Tube and Extension SetFor Continuous Feeding with Pump Using the CORFLO Anti-IV Feeding Tube the instructions above for Continuous Feeding. Simply hang the syringe rather than putting it in a syringe pump

Kay, Mark A.

456

Tracking the Sun IV: An Historical Summary of the Installed Cost of Photovoltaics in the United States from 1998 to 2010  

E-Print Network [OSTI]

Efficiency Tracking the Sun IV: The Installed Cost of Photovoltaicsefficiency ratings for ftp://ftp.bls.gov/pub/special.requests/cpi/cpiai.txt Tracking the Sun IV: The Installed Cost of Photovoltaics

Darghouth, Naim

2012-01-01T23:59:59.000Z

457

Biosafety Inspection Protocol In accordance with best practices and National Institutes of Health (NIH) guidelines section IV-B-3-c-(1), periodic  

E-Print Network [OSTI]

of Health (NIH) guidelines section IV-B-3-c-(1), periodic inspections and re-inspections by the University

458

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

459

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

460

IV. -PHOTOMAGNETISM AND CONDUCT I W r PHOTOMAGNETIC EFFECT IN A Li-Mn FERRITE  

E-Print Network [OSTI]

IV. - PHOTOMAGNETISM AND CONDUCT I W r PHOTOMAGNETIC EFFECT IN A Li-Mn FERRITE P. BERNSTEIN and T'effet photomagnCtique dans le ferrite Fez,I oLi0.45Mn0.4504 au moyen de la variation de la perm investigated in a Fez.loLi0.45Mn0.4504ferrite by looking at the variations of the permeability under light

Paris-Sud XI, Université de

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

Solid Waste Operations Complex W-113: Project cost estimate. Preliminary design report. Volume IV  

SciTech Connect (OSTI)

This document contains Volume IV of the Preliminary Design Report for the Solid Waste Operations Complex W-113 which is the Project Cost Estimate and construction schedule. The estimate was developed based upon Title 1 material take-offs, budgetary equipment quotes and Raytheon historical in-house data. The W-113 project cost estimate and project construction schedule were integrated together to provide a resource loaded project network.

NONE

1995-01-01T23:59:59.000Z

462

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

463

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

464

Irradiation Alters MMP-2/TIMP-2 System and Collagen Type IV Degradation in Brain  

SciTech Connect (OSTI)

Purpose: Blood-brain barrier (BBB) disruption is one of the major consequences of radiation-induced normal tissue injury in the central nervous system. We examined the effects of whole-brain irradiation on matrix metalloproteinases (MMPs)/tissue inhibitors of metalloproteinases (TIMPs) and extracellular matrix (ECM) degradation in the brain. Methods and Materials: Animals received either whole-brain irradiation (a single dose of 10 Gy {gamma}-rays or a fractionated dose of 40 Gy {gamma}-rays, total) or sham-irradiation and were maintained for 4, 8, and 24 h following irradiation. mRNA expression levels of MMPs and TIMPs in the brain were analyzed by real-time reverse transcriptase-polymerase chain reaction (PCR). The functional activity of MMPs was measured by in situ zymography, and degradation of ECM was visualized by collagen type IV immunofluorescent staining. Results: A significant increase in mRNA expression levels of MMP-2, MMP-9, and TIMP-1 was observed in irradiated brains compared to that in sham-irradiated controls. In situ zymography revealed a strong gelatinolytic activity in the brain 24 h postirradiation, and the enhanced gelatinolytic activity mediated by irradiation was significantly attenuated in the presence of anti-MMP-2 antibody. A significant reduction in collagen type IV immunoreactivity was also detected in the brain at 24 h after irradiation. In contrast, the levels of collagen type IV were not significantly changed at 4 and 8 h after irradiation compared with the sham-irradiated controls. Conclusions: The present study demonstrates for the first time that radiation induces an imbalance between MMP-2 and TIMP-2 levels and suggests that degradation of collagen type IV, a major ECM component of BBB basement membrane, may have a role in the pathogenesis of brain injury.

Lee, Won Hee [School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia (United States); Warrington, Junie P.; Sonntag, William E. [Reynolds Oklahoma Center on Aging, Department of Geriatric Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma (United States); Lee, Yong Woo, E-mail: ywlee@vt.edu [School of Biomedical Engineering and Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia (United States); Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, Virginia (United States)

2012-04-01T23:59:59.000Z

465

Public Utility Commission Regulation and Cost-Effectiveness of Title IV: Lessons for CAIR  

SciTech Connect (OSTI)

There is growing evidence that the cost savings potential of the Title IV SO{sub 2} cap-and-trade program is not being reached. PUC regulatory treatment of compliance options appears to provide one explanation for this finding. That suggests that PUCs and utility companies should work together to develop incentive plans that will encourage cost-minimizing behavior for compliance with the EPA's recently issued Clean Air Interstate Rule.

Sotkiewicz, Paul M.; Holt, Lynne

2005-10-01T23:59:59.000Z

466

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.

467

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

468

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

469

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

470

Nuclear Magnetic Resonance Studies on Vanadium(IV) Electrolyte Solutions for Vanadium Redox Flow Battery  

SciTech Connect (OSTI)

The vanadium (IV) electrolyte solutions with various vanadium concentrations are studied by variable temperature 1H and 17O Nuclear Magnetic Resonance (NMR) spectroscopy. The structure and kinetics of vanadium (IV) species in the electrolyte solutions are explored with respect to vanadium concentration and temperature. It was found that the vanadium (IV) species exist as hydrated vanadyl ion, i.e. [VO(H2O)5]2+ forming an octahedral coordination with vanadyl oxygen in the axial position and the remaining positions occupied by water molecules. This hydrated vanadyl ion structure is stable in vanadium concentrations up to 3M and in the temperature range of 240 to 340 K. The sulfate anions in the electrolyte solutions are found to be weekly bound to this hydrated vanadyl ion and occupies its second coordination sphere. The possible effects of these sulfate anions in proton and water exchange between vanadyl ion and solvent molecules are discussed based on 1H and 17O NMR results.

Vijayakumar, M.; Burton, Sarah D.; Huang, Cheng; Li, Liyu; Yang, Zhenguo; Graff, Gordon L.; Liu, Jun; Hu, Jian Z.; Skyllas-Kazacos, Maria

2010-11-15T23:59:59.000Z

471

Fundamental Understanding of Crack Growth in Structural Components of Generation IV Supercritical Light Water Reactors  

SciTech Connect (OSTI)

This work contributes to the design of safe and economical Generation-IV Super-Critical Water Reactors (SCWRs) by providing a basis for selecting structural materials to ensure the functionality of in-vessel components during the entire service life. During the second year of the project, we completed electrochemical characterization of the oxide film properties and investigation of crack initiation and propagation for candidate structural materials steels under supercritical conditions. We ranked candidate alloys against their susceptibility to environmentally assisted degradation based on the in situ data measure with an SRI-designed controlled distance electrochemistry (CDE) arrangement. A correlation between measurable oxide film properties and susceptibility of austenitic steels to environmentally assisted degradation was observed experimentally. One of the major practical results of the present work is the experimentally proven ability of the economical CDE technique to supply in situ data for ranking candidate structural materials for Generation-IV SCRs. A potential use of the CDE arrangement developed ar SRI for building in situ sensors monitoring water chemistry in the heat transport circuit of Generation-IV SCWRs was evaluated and proved to be feasible.

Iouri I. Balachov; Takao Kobayashi; Francis Tanzella; Indira Jayaweera; Palitha Jayaweera; Petri Kinnunen; Martin Bojinov; Timo Saario

2004-11-17T23:59:59.000Z

472

On the origins of C IV absorption profile diversity in broad absorption line quasars  

E-Print Network [OSTI]

There is a large diversity in the C IV broad absorption line (BAL) profile among BAL quasars (BALQs). We quantify this diversity by exploring the distribution of the C IV BAL properties, FWHM, maximum depth of absorption and its velocity shift ($v_{\\rm md}$), using the SDSS DR7 quasar catalogue. We find the following: (i) Although the median C IV BAL profile in the quasar rest-frame becomes broader and shallower as the UV continuum slope ($\\alpha_{\\rm UV}$ at 1700-3000 A) gets bluer, the median individual profile in the absorber rest-frame remains identical, and is narrow (FWHM = 3500 km/s) and deep. Only 4 per cent of BALs have FWHM > 10,000 km/s. (ii) As the He II emission equivalent-width (EW) decreases, the distributions of FWHM and $v_{\\rm md}$ extend to larger values, and the median maximum depth increases. These trends are consistent with theoretical models in which softer ionizing continua reduce overionization, and allow radiative acceleration of faster BAL outflows. (iii) As $\\alpha_{\\rm UV}$ become...

Baskin, Alexei; Hamann, Fred

2015-01-01T23:59:59.000Z

473

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

474

Environmental effects of marine energy development around the world. Annex IV Final Report  

SciTech Connect (OSTI)

Annex IV is an international collaborative project to examine the environmental effects of marine energy devices among countries through the International Energy Agency’s Ocean Energy Systems Initiative (OES). The U.S. Department of Energy (DOE) serves as the Operating Agent for the Annex, in partnership with the Bureau of Ocean Energy Management (BOEM; formerly the Minerals Management Service), the Federal Energy Regulatory Commission (FERC), and National Oceanographic and Atmospheric Administration (NOAA). Numerous ocean energy technologies and devices are being developed around the world, and the few data that exist about the environmental effects of these technologies are dispersed among countries and developers. The purpose of Annex IV is to facilitate efficient government oversight of the development of ocean energy systems by compiling and disseminating information about the potential environmental effects of marine energy technologies and to identify methods of monitoring for these effects. Beginning in 2010, this three-year effort produced a publicly available searchable online database of environmental effects information (Tethys). It houses scientific literature pertaining to the environmental effects of marine energy systems, as well as metadata on international ocean energy projects and research studies. Two experts’ workshops were held in Dublin, Ireland (September 2010 and October 2012) to engage with international researchers, developers, and regulators on the scope and outcomes of the Annex IV project. Metadata and information stored in the Tethys database and feedback obtained from the two experts’ workshops were used as resources in the development of this report. This Annex IV final report contains three case studies of specific interactions of marine energy devices with the marine environment that survey, compile, and analyze the best available information in one coherent location. These case studies address 1) the physical interactions between animals and tidal turbines; 2) the acoustic impact of marine energy devices on marine animals; and 3) the effects of energy removal on physical systems. Each case study contains a description of environmental monitoring efforts and research studies, lessons learned, and analysis of remaining information gaps. The information collected through the Annex IV effort and referenced in this report, can be accessed on the Tethys database at http://mhk.pnnl.gov/wiki/index.php/Tethys_ Home.

Copping, Andrea; Hanna, Luke; Whiting, Johnathan; Geerlofs, Simon; Grear, Molly; Blake, Kara (Pacific Northwest National Laboratory, Richland, WA (United States)); Coffey, Anna; Massaua, Meghan; Brown-Saracino, Jocelyn; Battey, Hoyt (US Dept. of Energy, Washington, DC (United States))

2013-01-15T23:59:59.000Z

475

Rational Ligand Design for U(VI) and Pu(IV)  

SciTech Connect (OSTI)

Nuclear power is an attractive alternative to hydrocarbon-based energy production at a time when moving away from carbon-producing processes is widely accepted as a significant developmental need. Hence, the radioactive actinide power sources for this industry are necessarily becoming more widespread, which is accompanied by the increased risk of exposure to both biological and environmental systems. This, in turn, requires the development of technology designed to remove such radioactive threats efficiently and selectively from contaminated material, whether that be contained nuclear waste streams or the human body. Raymond and coworkers (University of California, Berkeley) have for decades investigated the interaction of biologically-inspired, hard Lewis-base ligands with high-valent, early-actinide cations. It has been established that such ligands bind strongly to the hard Lewis-acidic early actinides, and many poly-bidentate ligands have been developed and shown to be effective chelators of actinide contaminants in vivo. Work reported herein explores the effect of ligand geometry on the linear U(IV) dioxo dication (uranyl, UO{sub 2}{sup 2+}). The goal is to utilize rational ligand design to develop ligands that exhibit shape selectivity towards linear dioxo cations and provides thermodynamically favorable binding interactions. The uranyl complexes with a series of tetradentate 3-hydroxy-pyridin-2-one (3,2-HOPO) ligands were studied in both the crystalline state as well as in solution. Despite significant geometric differences, the uranyl affinities of these ligands vary only slightly but are better than DTPA, the only FDA-approved chelation therapy for actinide contamination. The terepthalamide (TAM) moiety was combined into tris-beidentate ligands with 1,2- and 3,2-HOPO moieties were combined into hexadentate ligands whose structural preferences and solution thermodynamics were measured with the uranyl cation. In addition to achieving coordinative saturation, these ligands exhibited increased uranyl affinity compared to bis-Me-3,2-HOPO ligands. This result is due in part to their increased denticity, but is primarily the result of the presence of the TAM moiety. In an effort to explore the relatively unexplored coordination chemistry of Pu(IV) with bidentate moieties, a series of Pu(IV) complexes were also crystallized using bidentate hydroxypyridinone and hydroxypyrone ligands. The geometries of these complexes are compared to that of the analogous Ce(IV) complexes. While in some cases these showed the expected structural similarities, some ligand systems led to significant coordination changes. A series of crystal structure analyses with Ce(IV) indicated that these differences are most likely the result of crystallization condition differences and solvent inclusion effects.

Szigethy, Geza

2009-08-12T23:59:59.000Z

476

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

477

Section IV  

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

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478

Computational mechanics research and support for aerodynamics and hydraulics at TFHRC. Quarterly report January through March 2011. Year 1 Quarter 2 progress report.  

SciTech Connect (OSTI)

This 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 the Turner-Fairbank Highway Research Center 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 January through March 2011.

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

2011-05-19T23:59:59.000Z

479

Using Mesoscale Weather Model Output as Boundary Conditions for Atmospheric Large-Eddy Simulations and Wind-Plant Aerodynamic Simulations (Presentation)  

SciTech Connect (OSTI)

Wind plant aerodynamics are directly affected by the microscale weather, which is directly influenced by the mesoscale weather. Microscale weather refers to processes that occur within the atmospheric boundary layer with the largest scales being a few hundred meters to a few kilometers depending on the atmospheric stability of the boundary layer. Mesoscale weather refers to large weather patterns, such as weather fronts, with the largest scales being hundreds of kilometers wide. Sometimes microscale simulations that capture mesoscale-driven variations (changes in wind speed and direction over time or across the spatial extent of a wind plant) are important in wind plant analysis. In this paper, we present our preliminary work in coupling a mesoscale weather model with a microscale atmospheric large-eddy simulation model. The coupling is one-way beginning with the weather model and ending with a computational fluid dynamics solver using the weather model in coarse large-eddy simulation mode as an intermediary. We simulate one hour of daytime moderately convective microscale development driven by the mesoscale data, which are applied as initial and boundary conditions to the microscale domain, at a site in Iowa. We analyze the time and distance necessary for the smallest resolvable microscales to develop.

Churchfield, M. J.; Michalakes, J.; Vanderwende, B.; Lee, S.; Sprague, M. A.; Lundquist, J. K.; Moriarty, P. J.

2013-10-01T23:59:59.000Z

480

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

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481

Generation IV Reactors Integrated Materials Technology Program Plan: Focus on Very High Temperature Reactor Materials  

SciTech Connect (OSTI)

Since 2002, the Department of Energy's (DOE's) Generation IV Nuclear Energy Systems (Gen IV) Program has addressed the research and development (R&D) necessary to support next-generation nuclear energy systems. The six most promising systems identified for next-generation nuclear energy are described within this roadmap. Two employ a thermal neutron spectrum with coolants and temperatures that enable hydrogen or electricity production with high efficiency (the Supercritical Water Reactor-SCWR and the Very High Temperature Reactor-VHTR). Three employ a fast neutron spectrum to enable more effective management of actinides through recycling of most components in the discharged fuel (the Gas-cooled Fast Reactor-GFR, the Lead-cooled Fast Reactor-LFR, and the Sodium-cooled Fast Reactor-SFR). The Molten Salt Reactor (MSR) employs a circulating liquid fuel mixture that offers considerable flexibility for recycling actinides and may provide an alternative to accelerator-driven systems. At the inception of DOE's Gen IV program, it was decided to significantly pursue five of the six concepts identified in the Gen IV roadmap to determine which of them was most appropriate to meet the needs of future U.S. nuclear power generation. In particular, evaluation of the highly efficient thermal SCWR and VHTR reactors was initiated primarily for energy production, and evaluation of the three fast reactor concepts, SFR, LFR, and GFR, was begun to assess viability for both energy production and their potential contribution to closing the fuel cycle. Within the Gen IV Program itself, only the VHTR class of reactors was selected for continued development. Hence, this document will address the multiple activities under the Gen IV program that contribute to the development of the VHTR. A few major technologies have been recognized by DOE as necessary to enable the deployment of the next generation of advanced nuclear reactors, including the development and qualification of the structural materials needed to ensure their safe and reliable operation. The focus of this document will be the overall range of DOE's structural materials research activities being conducted to support VHTR development. By far, the largest portion of material's R&D supporting VHTR development is that being performed directly as part of the Next-Generation Nuclear Plant (NGNP) Project. Supplementary VHTR materials R&D being performed in the DOE program, including university and international research programs and that being performed under direct contracts with the American Society for Mechanical Engineers (ASME) Boiler and Pressure Vessel Code, will also be described. Specific areas of high-priority materials research that will be needed to deploy the NGNP and provide a basis for subsequent VHTRs are described, including the following: (1) Graphite: (a) Extensive unirradiated materials characterization and assessment of irradiation effects on properties must be performed to qualify new grades of graphite for nuclear service, including thermo-physical and mechanical properties and their changes, statistical variations from billot-to-billot and lot-to-lot, creep, and especially, irradiation creep. (b) Predictive models, as well as codification of the requirements and design methods for graphite core supports, must be developed to provide a basis for licensing. (2) Ceramics: Both fibrous and load-bearing ceramics must be qualified for environmental and radiation service as insulating materials. (3) Ceramic Composites: Carbon-carbon and SiC-SiC composites must be qualified for specialized usage in selected high-temperature components, such as core stabilizers, control rods, and insulating covers and ducting. This will require development of component-specific designs and fabrication processes, materials characterization, assessment of environmental and irradiation effects, and establishment of codes and standards for materials testing and design requirements. (4) Pressure Vessel Steels: (a) Qualification of short-term, high-temperature properties of light water rea

Corwin, William R [ORNL; Burchell, Timothy D [ORNL; Katoh, Yutai [ORNL; McGreevy, Timothy E [ORNL; Nanstad, Randy K [ORNL; Ren, Weiju [ORNL; Snead, Lance Lewis [ORNL; Wilson, Dane F [ORNL

2008-08-01T23:59:59.000Z

482

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

483

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

484

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

485

Differences between measured and linearly interpolated synoptic variables over a 12-h period during AVE IV  

E-Print Network [OSTI]

, Z4 April 1975. (after Fucik and Turner, 1975). 590 440 1D 1Dy ~ m 9 soo 530 560 18~ 530 I 22 ? g --' I / '3 22 0 590 20 338 530 16 850 mb 4 4 090 8 m 2D ? ? ? 6 ( ', -k 5 150 8 I '30 ~ 8O '4 210 210 700 BIb Fig. 6. (Cont3nued...DIFFERENCES BETWEEN MEASURED AND LINEARLY INTERPOLATED SYNOPTIC VARIABLES OVER A 12-h PERIOD DURING AVE IV A Thesis by LEONARD RAYMOND DUPUIS Submitted to the Graduate College of Texas A&M University in partial ful. fillment...

Dupuis, Leonard Raymond

1979-01-01T23:59:59.000Z

486

Gen IV Materials Handbook Functionalities and Operation (4A) Handbook Version 4.0  

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

2013-09-01T23:59:59.000Z

487

Request for Proposal No. DE-SOL-0007749 PART IV - REPRESENTATIONS AND INSTRUCTIONS  

National Nuclear Security Administration (NNSA)

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488

TOTAL SES EJ/EK EN V EN IV EN III  

National Nuclear Security Administration (NNSA)

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489

ARM - Field Campaign - AIRS Validation Soundings Phase IV and V-TWP  

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

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490

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

491

LITERATURE REVIEW: REDUCTION OF NP(V) TO NP (IV)-ALTERNATIVES TO FERROUS SULFAMATE  

SciTech Connect (OSTI)

The baseline approach to control of Np oxidation in UREX and PUREX separation processes is the reduction of Np(V) and Np(VI) to Np(IV) using ferrous sulfamate. Use of this reagent results in increased sulfur and iron concentrations in the liquid waste streams from the process. Presence of these two elements, especially sulfur, increases the complexity of the development of wasteforms for immobilizing these effluents. Investigations are underway to identify reductants that eliminate sulfur and iron from the Np reduction process. While there are a variety of chemical reductants that will reduce Np to Np(IV) in nitric acid media, the reaction rates for most are so slow that the reductants are not be feasible for use in an operating plant process. In an attempt to identify additional alternatives to ferrous sulfamate, a literature search and review was performed. Based on the results of the literature review, it is concluded that photochemical and catalytic processes should also be investigated to test the utility of these two approaches. The catalytic process could be investigated for use in conjunction with chemical oxidants to speed the reaction rates for reductants that react slowly, but would otherwise be appropriate replacements for ferrous sulfamate. The photochemical approach, which has received little attention during the past few decades, also shows promise, especially the photocatalytic approach that includes a catalyst, such as Pt supported on SiC, which can be used in tandem with an oxidant, for Np reduction.

Kessinger, G.; Kyser, E.; Almond, P.

2009-09-28T23:59:59.000Z

492

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

493

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

494

Bifunction in Er{sup 3+}/Yb{sup 3+} co-doped BaTi{sub 2}O{sub 5}–Gd{sub 2}O{sub 3} glasses prepared by aerodynamic levitation method  

SciTech Connect (OSTI)

Graphical abstract: - Highlights: • Novel BaTi{sub 2}O{sub 5}–Gd{sub 2}O{sub 3} based glasses have been prepared by aerodynamic levitation. • The obtained glasses show high thermal stability with T{sub g} = 763.3 °C. • Er{sup 3+}/Yb{sup 3+} co-doped glasses show strong upconversion based on a two-photon process. • Red emission is stronger than green emissions for EBT by high Yb{sup 3+} concentration. • Magnetic ions are paramagnetic and the distribution is homogeneous in the glasses. - Abstract: Novel Er{sup 3+}/Yb{sup 3+} co-doped BaTi{sub 2}O{sub 5}–Gd{sub 2}O{sub 3} spherical glasses have been fabricated by aerodynamic levitation method. The thermal stability, upconversion luminescence, and magnetic properties of the present glass have been studied. The glasses show high thermal stability with 763.3 °C of the onset temperature of the glass transition. Red and green emissions centered at 671 nm, 548 nm and 535 nm are obtained at 980 nm excitation. The upconversion is based on a two-photon process by energy transfer, excited-state absorption, and energy back transfer. Yb{sup 3+} ions are more than Er{sup 3+} ions in the glass, resulting in efficient energy back transfer from Er{sup 3+} to Yb{sup 3+}. So the red emission is stronger than the green emissions. Magnetization curves indicate that magnetic rare earth ions are paramagnetic and the distribution is homogeneous and random in the glass matrix. Aerodynamic levitation method is an efficient way to prepare glasses with homogeneous rare earth ions.

Zhang, Minghui [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); University of Chinese Academy of Sciences, Beijing 100039 (China); Yu, Jianding; Pan, Xiuhong [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); Cheng, Yuxing [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China); University of Chinese Academy of Sciences, Beijing 100039 (China); Liu, Yan, E-mail: liuyan@mail.sic.ac.cn [State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050 (China)

2013-11-15T23:59:59.000Z

495

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

496

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

497

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.

T. Bjornard; R. Bari; R. Nishimura; P. Peterson; J. Roglans; D. Bley; J. Cazalet; G.G.M. Cojazzi; P. Delaune; M. Golay; G. Rendad; G. Rochau; M. Senzaki; I. Therios; M. Zentner

2006-05-01T23:59:59.000Z

498

Multiwavelength Monitoring of the Dwarf Seyfert 1 Galaxy NGC 4395. IV. The Variable UV Absorption Lines  

E-Print Network [OSTI]

We report the detection of variable UV absorption lines in NGC 4395, based on UV observations with the HST STIS carried out in April and July, 2004, as part of a reverberation-mapping campaign. Low-ionization lines of O I, N I, Si II, C II, and Fe II, are present in the low-state spectra (April 2004) at a velocity v_shift=-250 km/s (system A_l), and additional high-ionization lines of C IV and N V appear in the high-state spectra (July 2004) at v_shift=-250 km/s (system A_h) and at v_shift=-840 km/s (system B). The absence of absorption from the low metastable levels of Si II implies a density <~10^3 cm^(-3) for system A_l, indicating a location outside the narrow line region (NLR). System A_h is peculiar as only N V absorption is clearly detected. A high N V/C IV absorption ratio is expected for a high metallicity absorber, but this is excluded here as the metallicity of the host galaxy and of the nuclear gas is significantly subsolar. A simple acceptable model for systems A_h and B is an absorber located between the broad line region (BLR) and the NLR, which absorbs only the continuum and the BLR. At the low-state the strong narrow emission lines of C IV and N V dominate the spectrum, making the absorption invisible. At the high-state the absorbed continuum and BLR emission dominate the spectrum. Thus, the change in the observed absorption does not reflect a change in the absorber, but rather a change in the continuum and BLR emission from behind the absorber, relative to the emission from the NLR in front of the absorber. Studies of the absorption line variability in highly variable objects can thus break the degeneracy in the absorber distance determination inherent to single epoch studies.

Alexei Baskin; Ari Laor

2008-04-01T23:59:59.000Z

499

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

500

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