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


1

Batteries and fuel cell research Sri Narayan worked for 20 years at NASA's Jet Propulsion Laboratory (JPL) where he led the  

E-Print Network (OSTI)

Batteries and fuel cell research Sri Narayan worked for 20 years at NASA's Jet Propulsion California Los Angeles, CA 90089-1661 The USC Power Research Workshop, November 18, 2011 Batteries and Fuel Laboratory (JPL) where he led the fuel cell research activities for over 15 years and also headed

Levi, Anthony F. J.

2

Strategic Technology JET PROPULSION LABORATORY  

E-Print Network (OSTI)

Strategic Technology Directions JET PROPULSION LABORATORY National Aeronautics and Space Administration 2 0 0 9 #12;© 2009 California Institute of Technology. Government sponsorship acknowledged. #12;Strategic Technology Directions 2009 offers a distillation of technologies, their links to space missions

Waliser, Duane E.

3

Principles of Jet Propulsion and Gas Turbines  

Science Journals Connector (OSTI)

... the presentation of the basic theory of jet propulsion and the thermodynamics of the gas-turbine and rocket types of engine. The layout follows a logical sequence, on the whole ... reader is treated to the now well-known thermodynamic analysis of the power-producing gas turbine cycle, which seems rather misplaced in a book dealing with jet propulsion. In his ...

S. J. MOYES

1949-08-06T23:59:59.000Z

4

Cover: Mariner 9 spacecraft. JET PROPULSION  

E-Print Network (OSTI)

#12;Cover: Mariner 9 spacecraft. #12;JET PROPULSION LABORATORY 1971 ANNUAL REPORT A descrtptlon Jet Propulsion Laboratory CALIFORNIA INSTITUTE OF TECHNOLOGY 4800 OAK GROVE DRIVE PASADENA, CALIFORNIA 91103 #12;#12;DIRECTOR'S MESSAGE The successful orbiting of Mariner 9 around the planet Mars

Waliser, Duane E.

5

JET PROPULSION LABORATORY 1979 Annual Report  

E-Print Network (OSTI)

, is the most active and complex volcanic body in our solar system and has a surface composed primarily of Technology and the National Aeronautics and Space Administration for the period January 1 to December 31 JPL Technology Institutional Activities JET PROPULSION LABORATORY California Institute of Technology

Waliser, Duane E.

6

NASA Subsonic Jet Transport Noise Reduction Research  

Science Journals Connector (OSTI)

Although new jet transport airplanes in today''s fleet are considerably quieter than the first jet transports introduced about 40 years ago, airport community noise continues to be an important environmental issue. NASA''s Advanced Subsonic Transport ...

Powell Clemans A.; Preisser John S.

2000-08-01T23:59:59.000Z

7

Thermoelectric Microdevice Fabrication Process and Evaluation at the Jet Propulsion Laboratory (JPL)  

E-Print Network (OSTI)

system), radioisotope thermoelectric generators (RTGs) are used for power [1]. Thermoelectric devicesThermoelectric Microdevice Fabrication Process and Evaluation at the Jet Propulsion Laboratory (JPL of integrated thermal management and power management and distribution. Micro thermoelectric converters

8

Research in Hypersonic Airbreathing Propulsion at NASA Langley Research Center  

Science Journals Connector (OSTI)

The NASA Langley Research Center has been conducting research for over 4 decades to develop technology for an airbreathing-propelled vehicle. Several other organizations within the United States have also been involved in this endeavor. Even though significant ...

Kumar Ajay; Drummond J. Philip; McClinton Charles R.; Hunt James L.

2001-09-01T23:59:59.000Z

9

Innovative nuclear thermal propulsion technology evaluation: Results of the NASA/DOE Task Team study  

SciTech Connect

In response to findings from two NASA/DOE nuclear propulsion workshops held in the summer of 1990, six task teams were formed to continue evaluation of various nuclear propulsion concepts. The Task Team on Nuclear Thermal Propulsion (NTP) created the Innovative Concepts Subpanel to evaluate thermal propulsion concepts which did not utilize solid fuel. The Subpanel endeavored to evaluate each of the concepts on a level technological playing field,'' and to identify critical technologies, issues, and early proof-of-concept experiments. The concepts included the liquid core fission, the gas core fission, the fission foil reactors, explosively driven systems, fusion, and antimatter. The results of the studies by the panel will be provided. 13 refs., 6 figs., 2 tabs.

Howe, S. (Los Alamos National Lab., NM (United States)); Borowski, S. (National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center); Motloch, C. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Helms, I. (Nuclear Utility Services, Damascus, MD (United States)); Diaz, N.; Anghaie, S. (Florida Univ., Gainesville, FL (United States)); Latham, T. (United

1991-01-01T23:59:59.000Z

10

NASA's Jet Propulsion Laboratory Pasadena, California 91109-8099  

E-Print Network (OSTI)

Government nor any person acting on behalf of the United States Government assumes any liability resulting privately owned rights. If trade names or manufacturers' names are used in this report by utilizing the transient response of a current pulse. The performance of such a device, using (Bi,Sb)2Te3

Chen, Gang

11

The methodology of variable management of propellant fuel consumption by jet-propulsion engines of a spacecraft  

Science Journals Connector (OSTI)

Traditionally, management of propellant fuel consumption on board of a spacecraft is only associated with the operation of jet-propulsion engines (JPE) that are actuator devices of ... systems (MCS). The efficien...

V. S. Kovtun

2012-12-01T23:59:59.000Z

12

Exhaust-gas measurements from NASAs HYMETS arc jet.  

SciTech Connect

Arc-jet wind tunnels produce conditions simulating high-altitude hypersonic flight such as occurs upon entry of space craft into planetary atmospheres. They have traditionally been used to study flight in Earth's atmosphere, which consists mostly of nitrogen and oxygen. NASA is presently using arc jets to study entry into Mars' atmosphere, which consists of carbon dioxide and nitrogen. In both cases, a wide variety of chemical reactions take place among the gas constituents and with test articles placed in the flow. In support of those studies, we made measurements using a residual gas analyzer (RGA) that sampled the exhaust stream of a NASA arc jet. The experiments were conducted at the HYMETS arc jet (Hypersonic Materials Environmental Test System) located at the NASA Langley Research Center, Hampton, VA. This report describes our RGA measurements, which are intended to be used for model validation in combination with similar measurements on other systems.

Miller, Paul Albert

2010-11-01T23:59:59.000Z

13

Acknowledgments: NASA Glenn Research Center (Grant #NNC04GB44G) College of Engineering Prof. Martin Abraham NASA envisions employing fuel cells running on jet fuel reformate for its uninhabited aerial vehicles (UAVs), low emission alternative power (LE  

E-Print Network (OSTI)

1 a Acknowledgments: · NASA Glenn Research Center (Grant #NNC04GB44G) · College of Engineering · Prof. Martin Abraham NASA envisions employing fuel cells running on jet fuel reformate for its is a critical path in the designing of jet fuel processors and their eventual utilization in powering NASA

Azad, Abdul-Majeed

14

NASA @ APS | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

developing rocket propulsion hardware Patrick McManamen, a propulsion system engineer at NASA, examines a cryogenically cooled fuel spray from a test rocket injector...

15

JET PROPULSION LABORATORY 1987 ANNUAL REPORT (Cover) At the heart of the  

E-Print Network (OSTI)

-sufficient in energy, JPL responded with research and develop- ment in solar photovoltaics, solar thermal energy, and integrity as guiding principles; (2) as NASA's lead center for unmanned exploration of the solar system, JPL- ally funded research and development center, JPL helps the United States solve technologi- cal problems

Waliser, Duane E.

16

NASA  

Science Journals Connector (OSTI)

The National and Space Administration (NASA) was established to direct the American space... Expansion of knowledge of phenomena in the atmosphere and space. Improvement of the usefulness, performance, speed...

Conway W. Snyder

1997-01-01T23:59:59.000Z

17

DUAL-MODE PROPULSION SYSTEM ENABLING CUBESAT EXPLORATION OF THE SOLAR SYSTEM NASA Innovative Advanced Concepts (NIAC) Phase I Final Report  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (~1,000 kgs to LEO) can be targeted. This, in effect, allows for beneficial explora-tion to be conducted within limited budgets. Researchers at the Center for Space Nuclear Re-search (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO. The proposed radioisotope-based system would leverage the high specific energies [J/kg] associated with radioisotope materials and enhance their inherent low specific powers [W/g]. This is accomplished by accumulating thermal energy from nuclear decay within a central core over time. This allows for significant amounts of power to be transferred to a flowing gas over short periods of time. In the proposed configuration the stored energy can be utilized in two ways: (1) with direct propellant injection to the core, the energy can be converted into thrust through the use of a converging-diverging nozzle and (2) by flowing a working fluid through the core and subsequent Brayton engine, energy within the core can be converted to electrical energy. The first scenario achieves moderate ranges of thrust, but at a higher Isp than traditional chemical-based systems. The second scenario allows for the production of electrical power, which is then available for electric-based propulsion. Additionally, once at location the production of electrical power can be dedicated to the payloads communication system for data transfer. Ultimately, the proposed dual-mode propulsion platform capitalizes on the benefits of two types of propulsion methods the thrust of thermal propulsion ideal for quick orbital maneuvers and the specific impulse of electric propulsion ideal for efficient inter-planetary travel. Previous versions of this RTR-based concept have been studied for various applications [NETS 1-3]. The current version of this concept is being matured through a NASA Innovative Advanced Concepts (NIAC) Phase I grant, awarded for FY 2014. In this study the RTR concept is being developed to deliver a 6U CubeSat payload to the orbit of the Saturnian moon - Enceladus. Additionally, this study will develop an entire mission architecture for Enceladus targeting a total allowable launch mass of 1,000 kg.

Nathan Jerred; Troy Howe; Adarsh Rajguru; Dr. Steven Howe

2014-06-01T23:59:59.000Z

18

Sandia National Laboratories: NASA  

NLE Websites -- All DOE Office Websites (Extended Search)

NASA Solar Electric Propulsion On May 1, 2013, in Bringing together expertise in advanced Brayton power conversion systems, concentrated solar collector technology and space system...

19

An investigation of the entrainment effects of a propulsive jet on the base pressure of blunt based bodies  

E-Print Network (OSTI)

associated with factory and power plant emission plumes. The entrainment rate of the free jet is an important aspect of the free jet flow. In the case of the emission plumes of fac- tory and power plants, the entrainment rate of the jet is a mea- sure... and transition regions of the free jet. Now recall equation (6) for the potential inflow velocity. Note that here the entrainment rate is a volumetric rats. Nanipu- lating equation (9) to obtain a volumetric rate, one obtains (12) 29 Noting that ~ K...

Berry, Ronald Allen

2012-06-07T23:59:59.000Z

20

Arc-Jet Complex POC: george.a.raiche@nasa.gov  

E-Print Network (OSTI)

-of-the-art aeroshell design and development; high enthalpy aero-thermal modeling and testing; high temperature material, and high speed Earth re-entry Conformal TPS: Reduces part count, eliminates gap issues, simplifies system.j.conerlison@nasa.gov Unique high enthalpy environmental simulation capability that serves customer-driven aero

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Jet Jet Jet Jet  

NLE Websites -- All DOE Office Websites (Extended Search)

protons protons top quark bottom quark muon top quark antiprotons bottom quark low energy muon quark quark - W boson + Jet Jet Jet Jet neutrino W boson particles antiparticles A Top Antitop Quark Event from the D-Zero Detector at Fermilab muon low energy muon Jet Jet Jet Jet particles antiparticles Particles Seen by the D-Zero Detector at Fermilab in a Top Antitop Quark Event. DST LEGO 16-JUL-1996 15:32 Run 92704 Event 14022 9-JUL-1995 13:17 MUON MUON Miss ET ET DST ETA-PHI 4 MUON 1 MISS ET 4 JET (HAD) (EM) D-Zero Detector at Fermi National Accelerator Laboratory Lego Plot CAL+TKS END VIEW 16-JUL-1996 15:33 Run 92704 Event 14022 9-JUL-1995 13:17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

22

Software Engineering for Space Exploration Iowa State University and Jet Propulsion Laboratory/California Institute of Technology  

E-Print Network (OSTI)

Safety. 1. Software engineering plays a vital role in space exploration Innovations in robotic spacecraft systems. For example, radiation-caused bit flips may result in software failure or unexpected software1 Software Engineering for Space Exploration Robyn Lutz Iowa State University and Jet

Lutz, Robyn R.

23

Nuclear electric propulsion : assessing the design of Project Prometheus.  

E-Print Network (OSTI)

The high fuel efficiency of electric propulsion makes it a viable alternative for long-distance space travel. Project Prometheus was a NASA-led project that sought to demonstrate that distant electric propulsion missions ...

Goycoolea, Martin

2013-01-01T23:59:59.000Z

24

Nuclear Propulsion in Space (1968)  

ScienceCinema (OSTI)

Project NERVA was an acronym for Nuclear Engine for Rocket Vehicle Application, a joint program of the U.S. Atomic Energy Commission and NASA managed by the Space Nuclear Propulsion Office (SNPO) at the Nuclear Rocket Development Station in Jackass Flats, Nevada U.S.A. Between 1959 and 1972, the Space Nuclear Propulsion Office oversaw 23 reactor tests, both the program and the office ended at the end of 1972.

None

2014-06-17T23:59:59.000Z

25

Nuclear Propulsion in Space (1968)  

SciTech Connect

Project NERVA was an acronym for Nuclear Engine for Rocket Vehicle Application, a joint program of the U.S. Atomic Energy Commission and NASA managed by the Space Nuclear Propulsion Office (SNPO) at the Nuclear Rocket Development Station in Jackass Flats, Nevada U.S.A. Between 1959 and 1972, the Space Nuclear Propulsion Office oversaw 23 reactor tests, both the program and the office ended at the end of 1972.

None

2012-06-23T23:59:59.000Z

26

Electric Propulsion  

Science Journals Connector (OSTI)

...is clear. The long-t?me continuous operation is required for electric propulsion pri-marily...travel against a small voltage to the cold element. The cell thereby produces an...concentrate and focus the solar rays on a heater. Little, if any, decrease in specific...

W. E. Moeckel

1963-10-11T23:59:59.000Z

27

NASA probes Genesis wreck in bid to salvage data  

Science Journals Connector (OSTI)

... The mission debris was dug out of the desert and taken to a cleanroom at the Jet Propulsion Laboratory in Pasadena. The Genesis Mishap Investigation Board will try ...

Nicola Jones

2004-09-15T23:59:59.000Z

28

E-Print Network 3.0 - advanced space propulsion Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Summary: for space drilling. The Jet Propulsion Laboratory's (JPL) ultrasonicsonic drillercorer (USDC... 1 Design and Modeling of the NU Smart Space Drilling System (SSDS)...

29

Jet Propulsion Laboratory (JPL) Agency Introduction: The FY 2012 budget request for NASA is $18.7 billion, the FY 2010 enacted  

E-Print Network (OSTI)

-guided projects aligned with the laboratory's Communications, Navigation and Entry, Descent and Landing expertise missions encounters two comets (EPOXI and Stardust NEXT missions), launches the Earth science Aquarius

30

Swimming dynamics and propulsive efficiency of squids throughout ontogeny  

E-Print Network (OSTI)

Swimming dynamics and propulsive efficiency of squids throughout ontogeny Ian K. Bartol,1,? Paul S and propulsive efficiency change throughout ontogeny, digital particle image velocimetry (DPIV) and kinematic Lolliguncula brevis swimming in a holding chamber or water tunnel (Re ¼ 20­20 000). Jet and fin wake bulk

Hynes, Wayne L.

31

ARM - Field Campaign - NASA Coordinated Airborne CO2 Lidar Flight Test  

NLE Websites -- All DOE Office Websites (Extended Search)

govCampaignsNASA Coordinated Airborne CO2 Lidar Flight Test Campaign govCampaignsNASA Coordinated Airborne CO2 Lidar Flight Test Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : NASA Coordinated Airborne CO2 Lidar Flight Test Campaign 2009.07.27 - 2009.08.07 Lead Scientist : Edward Browell For data sets, see below. Description This airborne field test campaign was designed to obtain a coordinated set of remote CO2 Laser Absorption Spectrometer (LAS) measurements using the NASA Langley/ITT 1.57-micron Continuous-Wave (CW) LAS operating from the NASA Langley UC-12 aircraft; the NASA Goddard 1.57-micron pulsed LAS operating from the NASA Glenn Lear-25 aircraft; and the NASA Jet Propulsion Laboratory 2.0-micron CW-coherent LAS operating from a contracted Twin Otter aircraft. These remote LAS CO2 column measurements were compared with

32

Radioisotope electric propulsion (REP): A near-term approach to nuclear propulsion  

Science Journals Connector (OSTI)

Studies over the last decade have shown radioisotope-based nuclear electric propulsion to be enhancing and, in some cases, enabling for many potential robotic science missions. Also known as radioisotope electric propulsion (REP), the technology offers the performance advantages of traditional reactor-powered electric propulsion (i.e., high specific impulse propulsion at large distances from the Sun), but with much smaller, affordable spacecraft. Future use of REP requires development of radioisotope power sources with system specific powers well above that of current systems. The US Department of Energy and NASA have developed an advanced Stirling radioisotope generator (ASRG) engineering unit, which was subjected to rigorous flight qualification-level tests in 2008, and began extended lifetime testing later that year. This advancement, along with recent work on small ion thrusters and life extension technology for Hall thrusters, could enable missions using REP sometime during the next decade.

George R. Schmidt; David H. Manzella; Hani Kamhawi; Tibor Kremic; Steven R. Oleson; John W. Dankanich; Leonard A. Dudzinski

2010-01-01T23:59:59.000Z

33

Fast Track nuclear thermal propulsion concept  

Science Journals Connector (OSTI)

The objective of the Space Exploration Initiative (America at the Threshold... 1991) is the exploration of Mars by man in the second decade of the 21st century. The NASA Fast Track approach (NASA?LeRC Presentation 1992) could accelerate the manned exploration of Mars to 2007. NERVA?derived nuclear propulsion represents a viable near?term technology approach to accomplish the accelerated schedule. Key milestones in the progression to the manned Mars mission are (1) demonstration of TRL?6 for the man?rateable system by 1999 (2) a robotic lunar mission by 2000 (3) the first cargo mission to Mars by 2005 and (4) the piloted Mars mission in 2007. The Rocketdyne?Westinghouse concept for nuclear thermal propulsion to achieve these milestones combines the nuclear reactor technology of the Rover/NERVA programs and the state?of?the?art hardware designs from hydrogen?fueled rocket engine successes like the Space Shuttle Main Engine (SSME).

Richard A. Johnson; Herbert R. Zweig; Martin H. Cooper; Jack Wett Jr.

1993-01-01T23:59:59.000Z

34

Fast Track'' nuclear thermal propulsion concept  

SciTech Connect

The objective of the Space Exploration Initiative ( America at the Threshold...,'' 1991) is the exploration of Mars by man in the second decade of the 21st century. The NASA Fast Track'' approach (NASA-LeRC Presentation, 1992) could accelerate the manned exploration of Mars to 2007. NERVA-derived nuclear propulsion represents a viable near-term technology approach to accomplish the accelerated schedule. Key milestones in the progression to the manned Mars mission are (1) demonstration of TRL-6 for the man-rateable system by 1999, (2) a robotic lunar mission by 2000, (3) the first cargo mission to Mars by 2005, and (4) the piloted Mars mission in 2007. The Rocketdyne-Westinghouse concept for nuclear thermal propulsion to achieve these milestones combines the nuclear reactor technology of the Rover/NERVA programs and the state-of-the-art hardware designs from hydrogen-fueled rocket engine successes like the Space Shuttle Main Engine (SSME).

Johnson, R.A.; Zweig, H.R. (Rocketdyne Division, Rockwell International Corporation, 6633 Canoga Avenue, P.O. Box 7922, Canoga Park, California 91309-7922 (United States)); Cooper, M.H.; Wett, J. Jr. (Westinghouse Electric Corporation, Post Office Box 158, Madison, Pennsylvania 15663 (United States))

1993-01-10T23:59:59.000Z

35

Recent advances in nuclear powered electric propulsion for space exploration  

Science Journals Connector (OSTI)

Nuclear and radioisotope powered electric thrusters are being developed as primary in space propulsion systems for potential future robotic and piloted space missions. Possible applications for high-power nuclear electric propulsion include orbit raising and maneuvering of large space platforms, lunar and Mars cargo transport, asteroid rendezvous and sample return, and robotic and piloted planetary missions, while lower power radioisotope electric propulsion could significantly enhance or enable some future robotic deep space science missions. This paper provides an overview of recent US high-power electric thruster research programs, describing the operating principles, challenges, and status of each technology. Mission analysis is presented that compares the benefits and performance of each thruster type for high priority NASA missions. The status of space nuclear power systems for high-power electric propulsion is presented. The paper concludes with a discussion of power and thruster development strategies for future radioisotope electric propulsion systems.

R. Joseph Cassady; Robert H. Frisbee; James H. Gilland; Michael G. Houts; Michael R. LaPointe; Colleen M. Maresse-Reading; Steven R. Oleson; James E. Polk; Derrek Russell; Anita Sengupta

2008-01-01T23:59:59.000Z

36

JET PROPULSION LASORATORY 1984 Annual Report  

E-Print Network (OSTI)

. and silicates. These are the materials from which the comets, asteroids. and planets of our own solar system and JPL received approval to begin the Mars Observer. The next proposed core mission, the Comet Rendezvous challenges that lie ahead. Increased appreciation of Earth as a planet where land, sea, and air interact

Waliser, Duane E.

37

PUBLIC INFORMATION OFFICE JET PROPULSION LABORATORY  

E-Print Network (OSTI)

, and which become ionized, or charged, in the solar wind. Eventually, they reach energies at which the solar wind is speeding at double the rate normally found at lower latitudes. Measurements from Ulysses' solar wind plasma experiment, presented today at the 1993 fall meeting of the American Geophysical Union

Christian, Eric

38

Efficiency of Fish Propulsion  

E-Print Network (OSTI)

It is shown that the system efficiency of a self-propelled flexible body is ill-defined unless one considers the concept of quasi-propulsive efficiency, defined as the ratio of the power needed to tow a body in rigid-straight condition over the power it needs for self-propulsion, both measured for the same speed. Through examples we show that the quasi-propulsive efficiency is the only rational non-dimensional metric of the propulsive fitness of fish and fish-like mechanisms. Using two-dimensional viscous simulations and the concept of quasi-propulsive efficiency, we discuss the efficiency two-dimensional undulating foils. We show that low efficiencies, due to adverse body-propulsor hydrodynamic interactions, cannot be accounted for by the increase in friction drag.

Maertens, A P; Yue, D K P

2014-01-01T23:59:59.000Z

39

Marine Nuclear Propulsion  

Science Journals Connector (OSTI)

... June 30 about 95 qualified scientists and engineers were engaged on research and development on marine nuclear ... nuclear propulsion within his Department, including the Atomic Energy Authority and the Ship Research Association. This ...

1965-07-31T23:59:59.000Z

40

NASA Patter  

Science Journals Connector (OSTI)

A representative selection of developments of interest to opticists reported in NASA Tech Briefs11, No. 6 (

Harris, Franklin S

1988-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Propulsion airframe aeroacoustics practices at Honeywell  

Science Journals Connector (OSTI)

Honeywell has been developing and applying acoustic models of propulsion airframe aeroacoustic phenomena for over 20 years. The initial application of a wing?shielding model was developed for the NASA General Aviation Synthesis Program in 1982. Since that time more sophisticated models of wing shielding and reflection have been developed with internal and NASA funding. Recent work has involved models of wing shielding for aft mounted engines and wing reflection for wing mounted engines. These methods are described in the presentation. Comparisons with the Raynoise Code by LMS and measured aircraft fly over noise data are made to show the effectiveness of the model. The attenuation of the inlet noise by the wing of an aft mounted engine and the amplification of the noise by wing mounted engines are evaluated.

2004-01-01T23:59:59.000Z

42

Induction-drive magnetohydrodynamic propulsion  

Science Journals Connector (OSTI)

The use of magnetohydrodynamic propulsion for marine applications is reviewed with emphasis on induction- ... . Comparisons are made with direct-drive MHD propulsion systems. Application to pumps for hazardous fl...

D. L. Mitchell; D. U. Gubser

1993-08-01T23:59:59.000Z

43

A new marine propulsion system  

Science Journals Connector (OSTI)

A new marine propulsion system is proposed. A small liquid sodium ... thruster combined with spray-water thruster works as propulsion. The configuration and characteristics of this system are described. Such a nu...

Wei-shi Han; Tao Liu

2003-06-01T23:59:59.000Z

44

NASA Patter  

Science Journals Connector (OSTI)

Some more developments of interest to the optics community and other readers have been selected by Patricia Wakeling from NASA Tech Briefs15, No.

Wakeling, Patricia R

1991-01-01T23:59:59.000Z

45

Thermodynamics and rocket propulsion  

Science Journals Connector (OSTI)

Thermodynamics and rocket propulsion ... This paper outlines the application of the principles of chemical thermodynamics to a comparison of the merit of one rocket propellant (fuel plus oxidizer) with that of another fuel-oxidizer pair for liquid-fueled rocket motors. ... Thermodynamics ...

Frank H. Verhoek

1969-01-01T23:59:59.000Z

46

ARM - Program Participants  

NLE Websites -- All DOE Office Websites (Extended Search)

Space Studies, New York, NY NASA - Goddard Space Flight Center, Greenbelt, MD NASA - Jet Propulsion Laboratory, Pasadena, CA NASA - Langley Research Center, Hampton, VA LaRC's...

47

NASA Green Flight Challenge: Conceptual Design Approaches and Technologies to Enable 200 Passenger Miles  

E-Print Network (OSTI)

-diesel, and other bio-fuel engines. The aircraft are using various technologies to improve aerodynamic, propulsionW = = = Jet Propellant Knots True Airspeed Kilo-Watt MPG = Miles Per Gallon MPGe MSL = = Miles Per Gallon

Waliser, Duane E.

48

Hypersonic missile propulsion system  

SciTech Connect

Pratt and Whitney is developing the technology for hypersonic components and engines. A supersonic combustion ramjet (scramjet) database was developed using hydrogen fueled propulsion systems for space access vehicles and serves as a point of departure for the current development of hydrocarbon scramjets. The Air Force Hypersonic Technology (HyTech) Program has put programs in place to develop the technologies necessary to demonstrate the operability, performance and structural durability of an expendable, liquid hydrocarbon fueled scramjet system that operates from Mach 4 to 8. This program will culminate in a flight type engine test at representative flight conditions. The hypersonic technology base that will be developed and demonstrated under HyTech will establish the foundation to enable hypersonic propulsion systems for a broad range of air vehicle applications from missiles to space access vehicles. A hypersonic missile flight demonstration is planned in the DARPA Affordable Rapid Response Missile Demonstrator (ARRMD) program in 2001.

Kazmar, R.R.

1998-11-01T23:59:59.000Z

49

NASA ASRS (Pub. 35) NASA ASRS (Pub. 35)  

E-Print Network (OSTI)

NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS (Pub. 35) #12;NASA ASRS

50

NASA ASRS (Pub. 34) NASA ASRS (Pub. 34)  

E-Print Network (OSTI)

NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS (Pub. 34) #12;NASA ASRS

51

NASA ASRS (Pub. 33) NASA ASRS (Pub. 33)  

E-Print Network (OSTI)

NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS (Pub. 33) #12;NASA ASRS

52

Scoping calculations of power sources for nuclear electric propulsion  

SciTech Connect

This technical memorandum describes models and calculational procedures to fully characterize the nuclear island of power sources for nuclear electric propulsion. Two computer codes were written: one for the gas-cooled NERVA derivative reactor and the other for liquid metal-cooled fuel pin reactors. These codes are going to be interfaced by NASA with the balance of plant in order to making scoping calculations for mission analysis.

Difilippo, F.C. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States)

1994-05-01T23:59:59.000Z

53

NASA's satellite orbit anomaly problem can be solved precisely in the frame of Einstein's special theory of relativity. Anomaly confirms that gravity fields propagate with velocity of light as Einstein predicted  

E-Print Network (OSTI)

NASA's Jet Propulsion Laboratory put on You Tube a problem that has been baffling the scientists for sometime. It involves an unexpected force acting on the space probes. The author proves that NASA'S satellite orbit anomaly problem can be solved in the frame of Einstein's Special Theory of Relativity. The anomaly confirms that gravity fields propagate with velocity of light as Einstein predicted. The proof is based on the authors discovery of the relativistic version of Newton's gravity field. The author provides formulas for relativistic equation of motion for a spacecraft in the joint gravitational field of the Earth and the Sun in a Lorentzian frame attached to the Earth. The formulas are suitable for digital computers and can be easily implemented. He also shows how to find solutions of the relativistic equations of motion for the spacecraft.

Victor M. Bogdan

2009-10-17T23:59:59.000Z

54

Vehicle Technologies Office: Propulsion Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials Materials Manufacturers use propulsion (or powertrain) materials in the components that move vehicles of every size and shape. Conventional vehicles use these materials in components such as the engine, transmission, fuel system, and exhaust after-treatment systems. Electric drive vehicles use propulsion materials in their electric motors and power electronics. Developing advanced propulsion materials is essential to commercializing new, highly efficient automotive technologies that have technical requirements that existing powertrain materials cannot meet. The Vehicle Technology Office's (VTO) research in propulsion materials focuses on four areas: Materials for hybrid and electric drive systems Materials for high efficiency combustion engines Materials to enable energy recovery systems and control exhaust gases

55

Optimal vortex rings and aquatic propulsion mechanisms  

Science Journals Connector (OSTI)

...vortex rings and aquatic propulsion mechanisms P. F. Linden...fluid mechanics behind these propulsion mechanisms and show that...over the cycle. 4. FISH PROPULSION BY UNDULATORY SWIMMING Most marine organisms have only discrete...

2004-01-01T23:59:59.000Z

56

NASA Academy Program Descriptions  

E-Print Network (OSTI)

NASA Academy Program Descriptions October 2010 #12;NASA Academy Program Descriptions 2011 October 11, 2010 1/5 NASA Academy at ARC, GRC, GSFC, and MSFC Websites: Ames: http://academy.arc.nasa.gov Glenn: http://academy.grc.nasa.gov Goddard: http://academy.gsfc.nasa.gov Marshall: http://academy.msfc.nasa

Wang, Z. Jane

57

Life Cycle Modeling of Propulsion Materials  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

propulsion materials manufacturing technologies with an emphasis on aluminum, magnesium, titanium, and ceramics * Advanced propulsion materials' potential in heavy-duty...

58

Advanced Propulsion Technology Strategy | Department of Energy  

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

Propulsion Technology Strategy Advanced Propulsion Technology Strategy GM is also developing new classes of electrically driven vehicles, leveraging technology first used in their...

59

CHANGING NASA  

Science Journals Connector (OSTI)

NASA SHOULD CONTRACT out the management of its 10 centersplaces such as Goddard Space Flight Centerto more effectively cany out the nation's plan for space exploration, which focuses on exploration of the moon and beyond (C&EN, March 1, page 22). That's ...

SUSAN MORRISSEY

2004-06-21T23:59:59.000Z

60

3rd Thermoelectrics Applications Workshop 2012 | Department of...  

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

Chestnut Hill, MA Analytical Modeling and Simulation of Thermomechanical Devices Jordan Chase NASA Jet Propulsion Laboratory, Pasadena, California Thermoelectric Bulk...

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


61

Jet Observables Without Jet Algorithms  

E-Print Network (OSTI)

We introduce a new class of event shapes to characterize the jet-like structure of an event. Like traditional event shapes, our observables are infrared/collinear safe and involve a sum over all hadrons in an event, but like a jet clustering algorithm, they incorporate a jet radius parameter and a transverse momentum cut. Three of the ubiquitous jet-based observables---jet multiplicity, summed scalar transverse momentum, and missing transverse momentum---have event shape counterparts that are closely correlated with their jet-based cousins. Due to their "local" computational structure, these jet-like event shapes could potentially be used for trigger-level event selection at the LHC. Intriguingly, the jet multiplicity event shape typically takes on non-integer values, highlighting the inherent ambiguity in defining jets. By inverting jet multiplicity, we show how to characterize the transverse momentum of the n-th hardest jet without actually finding the constituents of that jet. Since many physics applications do require knowledge about the jet constituents, we also build a hybrid event shape that incorporates (local) jet clustering information. As a straightforward application of our general technique, we derive an event-shape version of jet trimming, allowing event-wide jet grooming without explicit jet identification. Finally, we briefly mention possible applications of our method for jet substructure studies.

Daniele Bertolini; Tucker Chan; Jesse Thaler

2013-10-28T23:59:59.000Z

62

COGAS propulsion for LNG ships  

Science Journals Connector (OSTI)

Propulsion of liquefied natural gas (LNG) ships is undergoing significant change. The traditional steam plant is losing favor because of its low cycle efficiency. Medium-speed diesel-electric and slow-speed di...

Edwin G. Wiggins

2011-06-01T23:59:59.000Z

63

Vorticity structure and evolution in a transverse jet with new algorithms for scalable particle simulation  

E-Print Network (OSTI)

Transverse jets arise in many applications, including propulsion, effluent dispersion, oil field flows, V/STOL aerodynamics, and drug delivery. Furthermore, they exemplify flows dominated by coherent structures that cascade ...

Marzouk, Youssef M. (Youssef Mohamed)

2004-01-01T23:59:59.000Z

64

Full Fuel-Cycle Comparison of Forklift Propulsion Systems | Department...  

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

Full Fuel-Cycle Comparison of Forklift Propulsion Systems Full Fuel-Cycle Comparison of Forklift Propulsion Systems This report examines forklift propulsion systems and addresses...

65

Wind Turbines for Marine Propulsion  

Science Journals Connector (OSTI)

ABSTRACT The design and construction of an horizontal axis wind turbine drive for a small yacht is described. This system has been designed to test the performance of this novel type of propulsion for use in commercial shipping, the fisheries industry and for the recreational market. The use of wind turbines to harness the power available from the wind for propulsion purposes offers a number of distinct advantages over other wind propulsion systems. Propulsion is achieved in all directions of travel relative to the wind. Complete control of the system can be arranged from a remote control position such as the ships bridge. This control can be achieved with a small crew because of the opportunities for applying powered and automated control systems. The way in which each of these features is achieved, together with details of the rotor, shafting and gear-train arrangements are described here. An indication is given of the theoretical performance of the yacht under this form of propulsion.

N. Bose; R.C. McGregor

1984-01-01T23:59:59.000Z

66

Marine propulsion device with engine heat recovery system and streamlining hull closures  

SciTech Connect

A Marine Jet Propulsion System for use as an inboard engine for boats is herein described. An engine or motor means is attached in a driving relationship to a pump and thrust output apparatus. Heat generated by and rejected by the engine or motor is passed into the pump base for dissipation into the outputted jet thrust stream. Air and/or exhaust gas from the engine is ejected around the jet output stream to reduce against-the-hull turbulence and jet stream or thrust energy losses. Streamlining hull closures for the jet pump intake and output ports are provided to reduce system hull drag when not in use and to limit marine organism growth inside the pump.

Haynes, H. W.

1985-11-12T23:59:59.000Z

67

NASA Defends University Programs  

Science Journals Connector (OSTI)

NASA Defends University Programs ... Predoctoral fellowships, research and facilities grants are essential to the space effort, NASA says ... The Senate Appropriations Committee has questioned the propriety and legality of NASA's academic grant program (C&EN, Nov. 11, page 21). ...

1963-12-02T23:59:59.000Z

68

Nasas Information Power Grid Project  

Science Journals Connector (OSTI)

NASAs four Strategic Enterprises have bold goals that for achievement require orders-of-magnitude forward leaps in technology. Information systems technology is the key to enabling such breakthroughs, and so NAS...

Catherine H. Schulbach

2000-01-01T23:59:59.000Z

69

NASAS PATH DEPENDS ON CONGRESS  

Science Journals Connector (OSTI)

NASAS PATH DEPENDS ON CONGRESS ... President Barack Obama has given NASA a new human space exploration plan that replaces the agencys current path, which has enjoyed bipartisan support in Congress. ... Since the President introduced his plan, which relies on commercial partners, in February as part of his fiscal 2011 budget proposal, Congress has been studying details of it to help provide oversight of and direction to NASA. ...

DAVID PITTMAN

2010-08-30T23:59:59.000Z

70

Elastic tail propulsion at low Reynolds number  

E-Print Network (OSTI)

A simple way to generate propulsion at low Reynolds number is to periodically oscillate a passive flexible filament. Here we present a macroscopic experimental investigation of such a propulsive mechanism. A robotic swimmer ...

Yu, Tony S. (Tony Sheung)

2007-01-01T23:59:59.000Z

71

Gewaltfreier Widerstand der NASA.  

E-Print Network (OSTI)

??Das indigene Volk der Nasa im Norden des Cauca, Kolumbien, befindet sich seit der Kolonialzeit im Widerstandskampf. Die Nasa kmpfen um Autonomie, ihre traditionellen Territorien, (more)

Summereder, Magdalena

2012-01-01T23:59:59.000Z

72

Numerical study on active wave devouring propulsion  

Science Journals Connector (OSTI)

The possibility of extracting energy from gravity waves for marine propulsion was numerically studied by a two-dimensional...

Liyanarachchi Waruna Arampath De Silva

2012-09-01T23:59:59.000Z

73

The Progress of Marine Propulsion  

Science Journals Connector (OSTI)

... ships. Inventions, improvements, innovations have followed in rapid succession, and the history of marine engineering presents an endless and bewildering variety of engines and boilers which have been adopted ... so many rival methods of driving ships as they have to-day, each method of propulsion making by its performance or promise some claim to consideration. Modern ...

EDGAR C. SMITH

1929-03-09T23:59:59.000Z

74

PROPULSION AND ENERGY Terrestrial energy  

E-Print Network (OSTI)

PROPULSION AND ENERGY Terrestrial energy On the morning of Monday, August 29, Hurri- cane Katrina dependence we all have on power and energy systems. Nine major oil re- fineries in Louisiana and Mississippi- trial energy community is the question of why alternative energy sources, such as coal, solar, wind

Aggarwal, Suresh K.

75

National Aeronautics and Space Administration Jet Propulsion Laboratory  

E-Print Network (OSTI)

included developments in such diverse areas as cosmic buckyball science, Earth remote sensing, comet a comet -- the smallest such body ever visited, one described by our scientists as "hy- peractive, small flight events including landings and arrivals. But I was especially proud of how we were able to help

Waliser, Duane E.

76

Jet Propulsion Laboratory 1972-1973 Annual Report  

E-Print Network (OSTI)

flyby, solar-electric powered space- craft to Comet Encke in the 1980s. In an effort to effect, and two Mariner-class vehicles for 1977 launch to Jupiter and Saturn. Although the Laboratory has experi

Waliser, Duane E.

77

SUNITA PAYRA VERMA Jet Propulsion Laboratory, California Institute of Technology  

E-Print Network (OSTI)

Associate · In project entitled "Scale up to obtain super clean coal - Organo-refining and identification

78

National Aeronautics and Space Administration Jet Propulsion Laboratory  

E-Print Network (OSTI)

Materials and Devices 32 Submillimeter-Wave Advanced Technologies 36 Nano and Micro Systems 40 Microfluidics

79

Astrophysical Jets  

SciTech Connect

Many astrophysical sources - especially those powered by release of gravitational energy - are associated with an outflow of material, generally taking place along the axis of symmetry of the system. In the most extreme cases, the outflow is accelerated to relativistic speeds; such a phenomenon is known as an astrophysical jet. When a relativistic jet points close to our line of sight, the observed radiation is strongly Doppler-boosted. Most spectacular cases of astrophysical jets are those produced by active galactic nuclei, where the measured spectrum - presumably dominated by the radiation from the jet - reaches up to the multi-GeV range. Our knowledge of these jets is limited: we don't fully understand how are they formed, collimated, and accelerated, and what is the process of conversion of the bulk energy of the jet into radiation. We anticipate that the increased sensitivity of GLAST will provide us with spectacular data yielding new insights as to their origin and structure.

Madejski, Grzegorz (SLAC) [SLAC

2006-05-01T23:59:59.000Z

80

The NASA CSTI High Capacity Power Program  

SciTech Connect

The SP-100 program was established in 1983 by DOD, DOE, and NASA as a joint program to develop the technology necessary for space nuclear power systems for military and civil applications. During 1986 and 1987, the NASA Advanced Technology Program was responsible for maintaining the momentum of promising technology advancement efforts started during Phase I of SP-100 and to strengthen, in key areas, the chances for successful development and growth capability of space nuclear reactor power systems for future space applications. In 1988, the NASA Advanced Technology Program was incorporated into NASA`s new Civil Space Technology Initiative (CSTI). The CSTI program was established to provide the foundation for technology development in automation and robotics, information, propulsion, and power. The CSTI High Capacity Power Program builds on the technology efforts of the SP-100 program, incorporates the previous NASA advanced technology project, and provides a bridge to the NASA exploration technology programs. The elements of CSTI high capacity power development include conversion systems - Stirling and thermoelectric, thermal management, power management, system diagnostics, and environmental interactions. Technology advancement in all areas, including materials, is required to provide the growth capability, high reliability and 7 to 10 years lifetime demanded for future space nuclear power systems. The overall program will develop and demonstrate the technology base required to provide a wide range of modular power systems while minimizing the impact of day/night operation as well as attitudes and distance from the Sun. Significant accomplishments in all of the program elements will be discussed, along with revised goals and project timelines recently developed.

Winter, J.M.

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Stellar jets  

E-Print Network (OSTI)

With a goal of understanding the conditions under which jets might be produced in novae and related objects, I consider the conditions under which jets are produced from other classes of accreting compact objects. I give an overview of accretion disk spectral states, including a discussion of in which states these jets are seen. I highlight the differences between neutron stars and black holes, which may help give us insights about when and how the presence of a solid surface may help or inhibit jet production.

Thomas J. Maccarone

2008-05-23T23:59:59.000Z

82

Gravitomagnetic jets  

SciTech Connect

We present a family of dynamic rotating cylindrically symmetric Ricci-flat gravitational fields whose geodesic motions have the structure of gravitomagnetic jets. These correspond to helical motions of free test particles up and down parallel to the axis of cylindrical symmetry and are reminiscent of the motion of test charges in a magnetic field. The speed of a test particle in a gravitomagnetic jet asymptotically approaches the speed of light. Moreover, numerical evidence suggests that jets are attractors. The possible implications of our results for the role of gravitomagnetism in the formation of astrophysical jets are briefly discussed.

Chicone, C.; Mashhoon, B. [Department of Mathematics and Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211 (United States); Department of Physics and Astronomy, University of Missouri, Columbia, Missouri 65211 (United States)

2011-03-15T23:59:59.000Z

83

HybriDrive Propulsion System  

NLE Websites -- All DOE Office Websites (Extended Search)

HybriDrive HybriDrive ® Propulsion System Cleaner, smarter power for transit DOE/FTA Fuel Cell Research Priorities Workshop Washington, DC 7 June 2010 Bart W. Mancini Sr. Principal Systems Engineer BAE Systems Ph: 607-770-4103 bart.mancini@baesystems.com 2 Overview 3 * BAE Systems FC Experience / Deployments * Technology gaps/barriers to full commercialization of fuel cell buses * Well-to-wheels energy efficiency and emissions * Cost metrics * Bus integration issues * Fuel cell bus R&D needs * Future plans BAE Systems FC Experience / Deployments 4 * 1998 - Georgetown/FTA/DOE Fuel Cell Bus #1 (still serviceable) * UTC 100 kW Phosphoric Acid FC using on-board Methanol Reformate, Hybrid propulsion & Electric accessories * 2000 - Georgetown/FTA/DOE Fuel Cell Bus #2 (retired) *

84

Experimental confirmation of the propulsion of marine vessels employing guided flexural waves in attached elastic fins  

Science Journals Connector (OSTI)

This paper describes the results of the first experimental verification of the idea of wave-like aquatic propulsion of manned marine vessels first published by the first author in 1994. The idea is based on employing the unique type of guided flexural elastic waves propagating along edges of immersed wedge-like structures attached to a body of a small ship or a submarine as keels or wings and used for the propulsion. The principle of employing such guided flexural waves as a source of aquatic propulsion is similar to that used in nature by stingrays. It is vitally important for the application of this idea to manned vessels that, in spite of vibration of the fins, the main body of the craft remains undisturbed as the energy of guided elastic waves is concentrated away from it. The main expected advantages of this new propulsion method over the existing ones, e.g. jets and propellers, are the following: it is quiet, and it is environmentally friendly and safe for people and wildlife. To verify the idea experimentally, the first working prototype of a small catamaran using the above-mentioned wave-like propulsion via the attached rubber keel has been built and tested. The test results have shown that the catamaran was propelled efficiently and could achieve the speed of 36cm/s, thus demonstrating that the idea of wave-like propulsion of manned craft is viable. The reported proof of the viability of this idea may open new opportunities for marine craft propulsion, which can have far-reaching implications.

V.V. Krylov; G.V. Pritchard

2007-01-01T23:59:59.000Z

85

Centenary of Practical Marine Screw Propulsion  

Science Journals Connector (OSTI)

... To mark the centenary of practical marine screw ... screw propulsion, a special exhibit was opened at the Science Museum, South Kensington, on February ...

1937-02-13T23:59:59.000Z

86

Low Cost Titanium ? Propulsion Applications | Department of...  

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

Applications Low Cost Titanium Propulsion Applications 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer...

87

NASA CHANGES SCIENCE FOCUS  

Science Journals Connector (OSTI)

NASA CHANGES SCIENCE FOCUS ... In the past year and a half, NASA has received a presidential plan to refocus its efforts with the goal of returning humans to the moon and then on to Mars. ... But the shift of scientific support has drawn concern from both Congress and other NASA followers. ...

SUSAN R. MORRISSEY

2005-07-04T23:59:59.000Z

88

Propulsive performance from oscillating propulsors with spanwise flexibility  

Science Journals Connector (OSTI)

...dimensional oscillating foil propulsion. M.Eng. thesis...Bose, N. 1991 Propulsion from an oscillating...planform. In Proc. Marine Dynamics Conf. 1991...Hydromechanics of swimming propulsion. Part 1. Swimming...Canada, Institute of Marine Dynamics report, no...

1997-01-01T23:59:59.000Z

89

NASAs New Robotic Lunar Program...  

Science Journals Connector (OSTI)

On 14 January 2004, President George W. Bush issued a policy statement entitled A Renewed Spirit of Discovery in which he called upon NASA to begin to plan for a resumption ... step, and beginning no later than 2...

Dr. David M. Harland

2008-01-01T23:59:59.000Z

90

Self Excited Vibration in a Specialised Electric Propulsion System  

Science Journals Connector (OSTI)

Special marine propulsion applications demand efficient manoeuvrability under extreme conditions. ... , vibration resonance and radiated noise from the propulsion shafting system must be kept to a ... purpose ves...

Don Chool Lee; Ronald D. Barro

2014-09-01T23:59:59.000Z

91

Vehicle Technologies Office: 2012 Propulsion Materials R&D Annual...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Propulsion Materials R&D Annual Progress Report Vehicle Technologies Office: 2013 Propulsion Materials R&D Annual Progress Report Low-Cost Direct Bonded Aluminum (DBA) Substrates...

92

Enabling Green Energy and Propulsion Systems via Direct Noise...  

NLE Websites -- All DOE Office Websites (Extended Search)

GE propulsion systems Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research...

93

DOE Scientist Earns Chairman's Award from Propulsion and Power...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance DOE Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance October 2, 2009 - 1:00pm...

94

Feasibility of MHD submarine propulsion  

SciTech Connect

This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.

Doss, E.D. (ed.) (Argonne National Lab., IL (United States)); Sikes, W.C. (ed.) (Newport News Shipbuilding and Dry Dock Co., VA (United States))

1992-09-01T23:59:59.000Z

95

NASA Enhanced Use Lease  

Energy.gov (U.S. Department of Energy (DOE))

Document describes a sample template of an enhanced used lease administered by NASA as part of a power purchase agreement (PPA).

96

NASA/CP--2006214202 NASA Space Exploration Logistics Workshop  

E-Print Network (OSTI)

NASA/CP--2006­214202 NASA Space Exploration Logistics Workshop Proceedings January 17-18, 2006 Washington, DC April 2006 #12;NASA STI Program ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program

de Weck, Olivier L.

97

Solar thermal propulsion status and future  

SciTech Connect

The status of solar absorber/thruster research is reviewed, and potential future applications and advanced solar thermal propulsion concepts are discussed. Emphasis is placed on two concepts, the windowless heat exchanger cavity and the porous material absorption concepts. Mission studies demonstrate greater than 50 percent increase in payload compared to chemical propulsion for a LEO-to-GEO mission. Alternative missions that have been considered for this concept include the Thousand Astronomical Unit mission, LEO-to-lunar orbit, and other SEI missions. It is pointed out that solar thermal propulsion is inherently simple and capable of moderate-to-high engine performance at moderate-to-low thrust levels. 15 refs.

Shoji, J.M.; Frye, P.E.; Mcclanahan, J.A. (Rockwell International Corp., Rocketdyne Div., Canoga Park, CA (United States))

1992-03-01T23:59:59.000Z

98

Integration of Electric Propulsion Systems with Spacecraft An Overview  

E-Print Network (OSTI)

electric propulsion systems are currently being developed ­ ranging from high-power (i.e., >10 kW) systems-propulsion systems to be used on small satellites? In the context of direct-drive electric propulsion? 1 Research1 Integration of Electric Propulsion Systems with Spacecraft ­ An Overview Thomas M. Liu1

Walker, Mitchell

99

Development of a Plasma Probe Positioner Positioner for Propulsion Research  

E-Print Network (OSTI)

(real-time, no delay) electric motor that divides a full rotation into a large number of steps1. #12 Advisor: Dr. Edgar Choueiri Mentor: Luke Uribarri #12;PPDyL 2 Outline Spacecraft Propulsion Electric vs. Chemical Propulsion How Electric Propulsion uses Plasma Problem with Electric Propulsion : Onset Solution

Petta, Jason

100

NASA Customer Satisfaction Survey  

NLE Websites -- All DOE Office Websites (Extended Search)

Customer Satisfaction Survey Customer Satisfaction Survey NASA's Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC) would like to encourage you to participate in the NASA ESDIS 2013 American Customer Satisfaction Survey. The ORNL DAAC is one of twelve data centers sponsored by NASA's Earth Science Data and Information System (ESDIS) project. The ESDIS project uses the results of this survey to evaluate our success and to determine where improvements are needed. Invitations will be sent to you, our users, from CFI Group [CFI Group on behalf of NASA (NASA@jangomail.com)] during the week of August 20, 2013. Each invitation will reference us as "ORNL DAAC / FLUXNET", and contain a unique secure link to this Web-based anonymous survey. We encourage you to participate!

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Marine Nuclear Propulsion for the United Kingdom  

Science Journals Connector (OSTI)

... the Government in an adjournment debate in the House of Commons on March 21 on marine nuclear ... nuclear propulsion, the Joint Parliamentary Secretary to the Ministry of Transport, Mr. John Hay, said ...

1960-04-09T23:59:59.000Z

102

NASA Remote Sensing and Archaeology  

Science Journals Connector (OSTI)

Although not its primary mission, NASAs remote sensing missions have been providing ... mounted on both orbital and suborbital platforms, NASA scientists and collaborators from international universities have .....

Marco J. Giardino

2012-01-01T23:59:59.000Z

103

Photo of the Week: Not Your Typical Jet Engine | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Not Your Typical Jet Engine Not Your Typical Jet Engine Photo of the Week: Not Your Typical Jet Engine November 23, 2012 - 11:57am Addthis As part of the Aircraft Nuclear Propulsion Program, the U.S. conducted extensive research showing that nuclear fission could power an aircraft. The research involved a series of Heat Transfer Reactor Experiments (HTREs), which tested if different types of jet engines could be run by nuclear power. In 1955, however, the project was cancelled, and a safe, operational prototype aircraft was never developed. In this 1988 photo, the two HTRE reactors are shown in transport to Idaho National Laboratory's EBR-1 visitor center, where they remain today. | Photo courtesy of Idaho National Laboratory. As part of the Aircraft Nuclear Propulsion Program, the U.S. conducted

104

NASA RESEARCH REEVALUATED  

Science Journals Connector (OSTI)

NASA RESEARCH REEVALUATED ... Critics of the research efforts, administered by NASA's Office of Biological & Physical Research (OBPR), question whether the science being conducted on the space shuttle missions and the International Space Station (ISS) is important enough to justify the enormous cost. ... The loss of the space shuttle Columbia and its seven-member crew in the skies over the Southwest U.S. on Feb. 1 has prompted NASA to ground its remaining shuttle fleet threatening the future of the space stationand Congress to initiate a thorough investigation of the accident and the overall space program. ...

SUSAN R. MORRISSEY

2003-03-24T23:59:59.000Z

105

Los Alamos, NASA  

NLE Websites -- All DOE Office Websites (Extended Search)

Unusual light in dark space revealed by Los Alamos, NASA November 7, 2014 Near-infrared data could change the way we think about galaxies LOS ALAMOS, N.M., Nov. 7, 2014-By looking...

106

The NASA Food Commercial Space  

E-Print Network (OSTI)

The NASA Food Technology Commercial Space Center and How Your Company Can Participate space in a range of food development projects. For more information about NASA FTCSC or to arrange a presentation about the NASA FTCSC program, contact Dr. Anthony L. Pometto III Director NASA Food Technology

Lin, Zhiqun

107

Inclusive Jets in PHP  

E-Print Network (OSTI)

Differential inclusive-jet cross sections have been measured in photoproduction for boson virtualities Q^2 < 1 GeV^2 with the ZEUS detector at HERA using an integrated luminosity of 300 pb^-1. Jets were identified in the laboratory frame using the k_T, anti-k_T or SIScone jet algorithms. Cross sections are presented as functions of the jet pseudorapidity, eta(jet), and the jet transverse energy, E_T(jet). Next-to-leading-order QCD calculations give a good description of the measurements, except for jets with low E_T(jet) and high eta(jet). The cross sections have the potential to improve the determination of the PDFs in future QCD fits. Values of alpha_s(M_Z) have been extracted from the measurements based on different jet algorithms. In addition, the energy-scale dependence of the strong coupling was determined.

Roloff, Philipp

2013-01-01T23:59:59.000Z

108

Inclusive Jets in PHP  

E-Print Network (OSTI)

Differential inclusive-jet cross sections have been measured in photoproduction for boson virtualities Q^2 < 1 GeV^2 with the ZEUS detector at HERA using an integrated luminosity of 300 pb^-1. Jets were identified in the laboratory frame using the k_T, anti-k_T or SIScone jet algorithms. Cross sections are presented as functions of the jet pseudorapidity, eta(jet), and the jet transverse energy, E_T(jet). Next-to-leading-order QCD calculations give a good description of the measurements, except for jets with low E_T(jet) and high eta(jet). The cross sections have the potential to improve the determination of the PDFs in future QCD fits. Values of alpha_s(M_Z) have been extracted from the measurements based on different jet algorithms. In addition, the energy-scale dependence of the strong coupling was determined.

Philipp Roloff

2013-10-23T23:59:59.000Z

109

Power balance in a helicon plasma source for space propulsion  

E-Print Network (OSTI)

Electric propulsion systems provide an attractive option for various spacecraft propulsion applications due to their high specific impulse. The power balance of an electric thruster based on a helicon plasma source is ...

White, Daniel B., Jr

2008-01-01T23:59:59.000Z

110

Large eddy simulation modelling of combustion for propulsion applications  

Science Journals Connector (OSTI)

...but also for power generation and for marine applications. The current trend is to...travel are the vehicle design and the propulsion system, and how to integrate them. Two types of propulsion systems, ramjets (Fry 2004) and scramjets...

2009-01-01T23:59:59.000Z

111

NASA Enhanced Use Lease  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

KCA-4204 KCA-4204 NASA JOHN F. KENNEDY SPACE CENTER ENHANCED USE LEASE This Enhanced Use Lease (the "Lease") is made as of the date set forth below by the signatories, by and between the NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, an Agency of the United States, John F. Kennedy Space Center, Florida, as the lessor (hereinafter "NASA-KSC"), and Florida Power & Light Company, a corporation organized and existing under the laws of the State of Florida, as the lessee (hereinafter "FPL"). This Lease is made under the authority of section 315 of the National Aeronautics and Space Act of 1958, as amended (42 U.S.C. §2459j) with reference to the following facts: R E C I T A L S A. NASA-KSC is committed to using its real property assets to efficiently

112

NASA Enhanced Use Lease  

NLE Websites -- All DOE Office Websites (Extended Search)

KCA-4204 KCA-4204 NASA JOHN F. KENNEDY SPACE CENTER ENHANCED USE LEASE This Enhanced Use Lease (the "Lease") is made as of the date set forth below by the signatories, by and between the NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, an Agency of the United States, John F. Kennedy Space Center, Florida, as the lessor (hereinafter "NASA-KSC"), and Florida Power & Light Company, a corporation organized and existing under the laws of the State of Florida, as the lessee (hereinafter "FPL"). This Lease is made under the authority of section 315 of the National Aeronautics and Space Act of 1958, as amended (42 U.S.C. §2459j) with reference to the following facts: R E C I T A L S A. NASA-KSC is committed to using its real property assets to efficiently

113

H? controller and bumpless transfer design for marine propulsion system  

Science Journals Connector (OSTI)

A method for controller design and switching controller without bump effect has been proposed for a marine propulsion system with diesel engine used as propeller prime-mover. Due to different regimens operation of ship propulsion, it is common practice ... Keywords: H controller, bumpless transfer, ship propulsion system

M. J. Lopez; L. Garcia; J. Lorenzo; A. Consegliere

2009-12-01T23:59:59.000Z

114

GLC Analysis of Organic Chelating Agents in Steam Propulsion Systems  

Science Journals Connector (OSTI)

......Chelating Agents in Steam Propulsion Systems by Paul J. Sniegoski...iminodi- acetic acid) in steam propulsion systems. For chromatogra...as an addi- tive to steam propulsion systems to prevent build-up...Fourth Internaval Conference on Marine Cor- rosion, Naval Research......

Paul J. Sniegoski; David L. Venezky

1974-06-01T23:59:59.000Z

115

Hydrogen loops in existing reactors for testing fuel elements for nuclear propulsion  

Science Journals Connector (OSTI)

The Space Exploration Initiative (SEI) has revitalized interest in adapting nuclear energy for power and propulsion. Prior to the selection of a nuclear thermal propulsion (NTP) system extensive testing of the various proposed concepts will be required. In todays environmental safety and health culture full size rocket engine tests as were done under the Rover/NERVA program will be extremely difficult and expensive to perform and meet NASAs schedules. A different test strategy uses a hydrogen loop in an existing reactor to test a wide variety of single elements or clusters of elements for fuel qualification. This approach is expected to reduce operating and capital costs and expedite the testing schedule. This paper examines the potential of performing subscale tests in a hydrogen loop in an existing reactor such as the Advanced Test Reactor (ATR) at the Idaho National Engineering Laboratory or the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory. The HFIR is expected to achieve power densities comparable to those achieved in ATR because of the 85 MWt power level and the high thermal and fast flux levels. The available length and diameter of the test region of FHIR are 60 cm and 10 cm whereas the available length and diameter of the test region of ATR are 120 cm and 12 cm respectively.

Charles S. Olsen; Henry Welland; James Abraschoff; Kenneth Thoms

1993-01-01T23:59:59.000Z

116

NASA PLANS RETURN TO MOON  

Science Journals Connector (OSTI)

NASA PLANS RETURN TO MOON ... By the end of the next decade, the moon will again be visited by humans, according to plans announced by NASA on Dec. 4. Unlike NASA's previous human missions to the moon, however, this plan would set up a permanent, self-sustaining lunar base at the south pole. ... As part of the plan, NASA would launch a series of robotic missions to study the moon in detail over the next few years. ...

2006-12-11T23:59:59.000Z

117

nasa Office Of Inspector General  

E-Print Network (OSTI)

nasa Office Of Inspector General S E m I A N N u A L r E P O r T october 1, 2010­march 31, 2011 #12;#12;FROM THE INSPECTOR GENERAL In January 2011, the NASA Office of Inspector General (OIG) took the unusual step of sending a letter to the Chairs and Ranking Members of NASA's congressional oversight

Christian, Eric

118

NASA OFFICE OF INSPECTOR GENERAL  

E-Print Network (OSTI)

NASA OFFICE OF INSPECTOR GENERAL SEMIANNUAL REPORT October 1, 2012­March 31, 2013 #12;A-3 Rocket 9 rocket lifts off from Cape Canaveral NASA's Curiosity rover on the Martian surface The Sun captured by NASA's Solar Dynamics Observatory #12;October 1, 2012­March 31, 2013 FROM THE INSPECTOR GENERAL

119

Page | 1 NASA Retrospective Plan Progress  

E-Print Network (OSTI)

Page | 1 NASA Retrospective Plan Progress January 9, 2011 Agency) Progress updates and anticipated accomplishments Notes 1. NASA/Procurement AD60 NASA Payments This rule revises the NASA Grant and Cooperative Handbook at 14 CFR

Waliser, Duane E.

120

Fluidic electrodynamics: Approach to electromagnetic propulsion  

SciTech Connect

We report on a new methodological approach to electrodynamics based on a fluidic viewpoint. We develop a systematic approach establishing analogies between physical magnitudes and isomorphism (structure-preserving mappings) between systems of equations. This methodological approach allows us to give a general expression for the hydromotive force, thus re-obtaining the Navier-Stokes equation departing from the appropriate electromotive force. From this ground we offer a fluidic approach to different kinds of issues with interest in propulsion, e.g., the force exerted by a charged particle on a body carrying current; the magnetic force between two parallel currents; the Magnus's force. It is shown how the intermingle between the fluid vector fields and electromagnetic fields leads to new insights on their dynamics. The new concepts introduced in this work suggest possible applications to electromagnetic (EM) propulsion devices and the mastery of the principles of producing electric fields of required configuration in plasma medium.

Martins, Alexandre A.; Pinheiro, Mario J. [Institute for Plasmas and Nuclear Fusion and Instituto Superior Tecnico Lisboa, Portugal 351.1.21.841.92.43 (Portugal); Department of Physics and Institute for Plasmas and Nuclear Fusion and Instituto Superior Tecnico Lisboa, Portugal 351.1.21.841.93.22 (Portugal)

2009-03-16T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Interplanetary space transport using inertial fusion propulsion  

SciTech Connect

In this paper, we indicate how the great advantages that ICF offers for interplanetary propulsion can be accomplished with the VISTA spacecraft concept. The performance of VISTA is expected to surpass that from other realistic technologies for Mars missions if the energy gain achievable for ICF targets is above several hundred. Based on the good performance expected from the U. S. National Ignition Facility (NIF), the requirements for VISTA should be well within the realm of possibility if creative target concepts such as the fast ignitor can be developed. We also indicate that a 6000-ton VISTA can visit any planet in the solar system and return to Earth in about 7 years or less without any significant physiological hazards to astronauts. In concept, VISTA provides such short-duration missions, especially to Mars, that the hazards from cosmic radiation and zero gravity can be reduced to insignificant levels. VISTA therefore represents a significant step forward for space-propulsion concepts.

Orth, C.D.

1998-04-20T23:59:59.000Z

122

Pivotal air induction for marine propulsion device  

SciTech Connect

This patent describes a marine propulsion device comprising a mounting bracket assembly, a propulsion unit including an internal combustion engine and being rotatably connected to the mounting bracket assembly for rotation relative to the mounting bracket assembly about a generally vertical steering axis. A shroud substantially encloses the engine and has therein a combustion air opening centered on the steering axis, and rigid duct means having opposite first and second ends. The first end communicates with the opening and being rotatably connected to the shroud for rotation about the steering axis, and the second end being adapted for connection and for communication through the transom of a boat to enable the engine to draw combustion air from the interior of the boat.

Ferguson, A.R.

1986-11-18T23:59:59.000Z

123

Sandia National Laboratories: Solar Electric Propulsion  

NLE Websites -- All DOE Office Websites (Extended Search)

a wide array of missions for NASA. This multipurpose space vehicle concentrates the Sun's energy into a Sandia designed solar collector using a large reflector to power a Sandia...

124

IEEE TRANSACTIONS ON ROBOTICS AND AUTOMATION, VOL. 17, NO. 6, DECEMBER 2001 939 Design and Analysis of a Sun Sensor for Planetary Rover  

E-Print Network (OSTI)

of the rovers NASA/Jet Propulsion Laboratory (JPL) plans to send to Mars in 2003. Our goal was to develop a sun trackers) by spacecraft and marine vehicles have attracted great interest in their use by planetary. The authors are with the National Aeronautics and Space Administration (NASA), Jet Propulsion Laboratory

Huntsberger, Terry

125

Simplest AB-Thermonuclear Space Propulsion and Electric Generator  

E-Print Network (OSTI)

The author applies, develops and researches mini-sized Micro- AB Thermonuclear Reactors for space propulsion and space power systems. These small engines directly convert the high speed charged particles produced in the thermonuclear reactor into vehicle thrust or vehicle electricity with maximum efficiency. The simplest AB-thermonuclear propulsion offered allows spaceships to reach speeds of 20,000 50,000 km/s (1/6 of light speed) for fuel ratio 0.1 and produces a huge amount of useful electric energy. Offered propulsion system permits flight to any planet of our Solar system in short time and to the nearest non-Sun stars by E-being or intellectual robots during a single human life period. Key words: AB-propulsion, thermonuclear propulsion, space propulsion, thermonuclear power system.

Alexander Bolonkin

2007-01-19T23:59:59.000Z

126

DOE/NASA/1005-2 FILE COpy NASA TM-83649 D N  

E-Print Network (OSTI)

DOE/NASA/1005-2 FILE COpy NASA TM-83649 D N REMOVE Overview of NASA Lewis Research Center Free available from NTIS at the above address. #12;DOE/NASA/1 005-2 NASA TM-83649 Overview of NASA Lewis Research #12;OVERVIEW OF NASA LEWIS RESEARCH CENTER FREE-PISTON STIRLING ENGINE ACTIVITIES Jack G. Slaby

Oak Ridge National Laboratory

127

Integrated Mathematical Modeling Software Series of Vehicle Propulsion...  

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

Mathematical Modeling Software Series of Vehicle Propulsion System: (1) Tractive Effort (T sub ew) of Vehicle Road WheelTrack Sprocket Integrated Mathematical Modeling Software...

128

Electric Motors for Vehicle Propulsion; Elektriska motorer fr fordonsframdrivning.  

E-Print Network (OSTI)

?? This work is intended to contribute with knowledge to the area of electic motorsfor propulsion in the vehicle industry. This is done by first (more)

Larsson, Martin

2014-01-01T23:59:59.000Z

129

Advances in Diode Laser Absorption Sensors for Combustion and Propulsion  

Science Journals Connector (OSTI)

Progress is reported in the evolution of diode laser sensors for combustion and propulsion systems. Applications are diverse, ranging from IC engines and gas turbine combustors to...

Hanson, Ronald K

130

Optimal trajectories with solar electric propulsion and gravity assisted maneuver.  

E-Print Network (OSTI)

??The future interplanetary missions will probably use the conventional chemical rockets to leave the sphere of influence of the Earth, and solar electric propulsion (SEP) (more)

Denilson Paulo Souza dos Santos

2009-01-01T23:59:59.000Z

131

Enabling Green Energy and Propulsion Systems via Direct Noise...  

NLE Websites -- All DOE Office Websites (Extended Search)

Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI...

132

Large-Eddy Simulation for Green Energy and Propulsion Systems...  

NLE Websites -- All DOE Office Websites (Extended Search)

Large-Eddy Simulation for Green Energy and Propulsion Systems PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: General Electric Allocation Program: INCITE Allocation...

133

Propulsion Materials R&D | Clean Energy | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Propulsion Materials Propulsion Materials SHARE Propulsion Materials Improve Powertrains Oak Ridge National Laboratory's transportation research and development in the area of Propulsion Materials is designed to identify and develop advanced materials and processes that improve powertrain system efficiency and reduce emissions. Cutting-edge materials research is crucial to enabling new vehicle technologies that are reliable, fuel efficient, and clean. ORNL researchers, in close collaboration with US industry, are focusing on materials for advanced engines, hybrid and electric drive systems, and vehicle exhaust systems. These materials promote a variety of performance benefits, including lightweighting, higher temperature capabilities, emissions reduction, thermal management, and corrosion mitigation.

134

NASA PLAGUED WITH SPACE PROBLEMS  

Science Journals Connector (OSTI)

NASA PLAGUED WITH SPACE PROBLEMS ... Staged against a ghetto backdrop, Washington Post cartoonist Herblock's question of Vice President Agnew, "You don't feel, then, that when you've seen one planet you've seen them all?" typifies the verbal missiles launched at NASA these days. ... And as if this weren't enough as the agency faces Congress over its next budget, NASA once again finds itself embroiled in questions of science vs. engineering and manned vs. unmanned missions. ...

1969-08-11T23:59:59.000Z

135

The Gasdynamic Mirror Fusion Propulsion System -- Revisited  

SciTech Connect

Many of the previous studies assessing the capability of the gasdynamic mirror (GDM) fusion propulsion system employed analyses that ignored the 'ambipolar' potential. This electrostatic potential arises as a result of the rapid escape of the electrons due to their small mass. As they escape, they leave behind an excess positive charge which manifests itself in an electric field that slows down the electrons while speeding up the ions until their respective axial diffusions are equalized. The indirect effect on the ions is that their confinement time is reduced relative to that of zero potential, and hence the plasma length must be increased to accommodate that change. But as they emerge from the thruster mirror - which serves as a magnetic nozzle - the ions acquire an added energy equal to that of the potential energy, and that in turn manifests itself in increased specific impulse and thrust. We assess the propulsive performance of the GDM thruster, based on the more rigorous theory, by applying it to a round trip Mars mission employing a continuous burn acceleration/deceleration type of trajectory. We find that the length of the device and travel time decrease with increasing plasma density, while the total vehicle mass reaches a minimum at a plasma density of 3 x 1016 cm-3. At such a density, and an initial DT ion temperature of 10 keV, a travel time of 60 days is found to be achievable at GDM propulsion parameters of about 200,000 seconds of specific impulse and approximately 47 kN of thrust.

Kammash, Terry [Department of Nuclear Engineering and Radiological Sciences, University of Michigan, 2355 Bonisteel Blvd, Ann Arbor, MI 48109 (United States); Tang, Ricky [Department of Aerospace Engineering, University Michigan, 1320 Beal Ave, Ann Arbor, MI 48109 (United States)

2005-02-06T23:59:59.000Z

136

CMC intake ramp for hypersonic propulsion systems  

SciTech Connect

An alternative technology to produce CMC structural components with lower costs and shorter manufacturing times has been developed at the DLR. The process is based on liquid silicon infiltration (LSI) into porous carbon/carbon resulting in a C/C-SiC material whereby the load carrying fibres are internally protected against oxidation by SiC. The material`s adequate strength levels and the high reproducibility of the state-of-the-art process now allows the realization of CMC components. Representing a very complex structure of high integrity, an intake ramp for a hypersonic propulsion system has been designed, manufactured and tested, which is described in this paper.

Kochendoerfer, R.; Krenkel, W. [Institute of Structures and Design, Stuttgart, (Germany)

1995-12-01T23:59:59.000Z

137

NASA | OpenEI  

Open Energy Info (EERE)

NASA NASA Dataset Summary Description (Abstract): Raster GIS ASCII data files of wind speed and wind power density at 10 and 50 m heights. Global data of offshore wind resource as generated by NASA's QuikSCAT SeaWinds scatterometer. (Purpose): To provide information on the wind resource potential of offshore areas. Source NREL Date Released December 31st, 2005 (8 years ago) Date Updated November 01st, 2007 (7 years ago) Keywords GEF GIS NASA NREL SWERA UNEP wind Data application/zip icon Download Maps (zip, 36.3 MiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period 2000 - 2004 License License Other or unspecified, see optional comment below Comment (Use Constraints): This GIS data was developed by the National Renewable Energy Laboratory ("NREL"), which is operated by the Midwest Research Institute for the U.S. Department of Energy ("DOE"). The user is granted the right, without any fee or cost, to use, copy, modify, alter, enhance and distribute this data for any purpose whatsoever, provided that this entire notice appears in all copies of the data. Further, the user of this data agrees to credit NREL in any publications or software that incorporate or use the data. Access to and use of the GIS data shall further impose the following obligations on the User. The names DOE/NREL may not be used in any advertising or publicity to endorse or promote any product or commercial entity using or incorporating the GIS data unless specific written authorization is obtained from DOE/NREL. The User also understands that DOE/NREL shall not be obligated to provide updates, support, consulting, training or assistance of any kind whatsoever with regard to the use of the GIS data. THE GIS DATA IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DOE/NREL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER, INCLUDING BUT NOT LIMITED TO CLAIMS ASSOCIATED WITH THE LOSS OF DATA OR PROFITS, WHICH MAY RESULT FROM AN ACTION IN CONTRACT, NEGLIGENCE OR OTHER TORTIOUS CLAIM THAT ARISES OUT OF OR IN CONNECTION WITH THE ACCESS OR USE OF THE GIS DATA. The User acknowledges that access to the GIS data is subject to U.S. Export laws and regulations and any use or transfer of the GIS data must be authorized under those regulations. The User shall not use, distribute, transfer, or transmit GIS data or any products incorporating the GIS data except in compliance with U.S. export regulations. If requested by DOE/NREL, the User agrees to sign written assurances and other export-related documentation as may be required to comply with U.S. export regulations.

138

OAI and NASA's scientific and technical  

E-Print Network (OSTI)

OAI and NASA's scientific and technical information Michael L. Nelson JoAnne Rocker and Terry L in (Van de Sompel and Lagoze (2000, 2002) and Lagoze and Van de Sompel (2001). NASA was an original member that harvest from NASA and non-NASA data providers. The NASA Scientific and Technical Information Program

Nelson, Michael L.

139

NASA 2011 Strategic Plan Vision & Mission  

E-Print Network (OSTI)

NASA 2011 Strategic Plan Vision & Mission Vision: NASA leads scientific and technological advances, education, innovation, economic vitality, and stewardship of the Earth. #12;NASA 2011 Strategic Plan Goals capabilities to conduct NASA's aeronautics and space activities. · Goal 6: Share NASA with the public

Waliser, Duane E.

140

60Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center NASA HCA Applications OutlineNASA HCA Applications Outline  

E-Print Network (OSTI)

60Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center NASA HCA Applications OutlineNASA HCA Applications Outline l 3T Control Architecture ­ architecture Satellite Assistant (under development) #12;61Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David

Kortenkamp, David

Note: This page contains sample records for the topic "nasa jet propulsion" 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

High performance path following for marine vehicles using azimuthing podded propulsion .  

E-Print Network (OSTI)

??Podded propulsion systems offer greater maneuvering possibilities for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis (more)

Greytak, Matthew B. (Matthew Bardeen)

2006-01-01T23:59:59.000Z

142

E-Print Network 3.0 - accent propulsion lander Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

vehicle design and operations, propulsion, orbital mechanics, spacecraft... on hypersonic flight and electric rocket propulsion. Dr. Erwin teaches two lower-division...

143

A modelling approach for the overall ship propulsion plant simulation  

Science Journals Connector (OSTI)

In the present paper, a modelling approach for the simulation of the overall ship propulsion plant is presented. A cycle mean value model with differential equations for the calculation of the engine crankshaft and turbocharger shaft speeds is used for ... Keywords: MATLAB Simulink, marine diesel engine, ship propulsion plant, simulation

G. P. Theotokatos

2007-11-01T23:59:59.000Z

144

CHAPTER 14 - Future of Solid Rocket Propulsion  

Science Journals Connector (OSTI)

Publisher Summary The technological progress of propulsion systems using solid propellants has so far been possible because of the expression of new requirements and the emergence of diversified applications. The search for optimal propellant performancespecific impulse Is and volumetric specific impulse Is ?continues to be the most important research mission, coupled with other expected technological progress. For composite propellants, revolutionary progress has been achieved only through extensive modifications of the active parts of the manufacturing process. So far, the difficulties facing this development do not involve basic issues such as mechanical components; rather they involve variety of issues ranging from the amount of precision required in the continuous feeding of raw materials and the high level of sensitivity of the propellants to minute variations in the amounts of crosslinking agent or catalyst. The technology of the ramjets and ramrockets is relevent to numerous applications to missiles. The range of systems from several hundred kilometers to several thousand kilometers is a possibility that is being investigated. The development of this type of propulsion is going to take several directions. Beyond applications to high-performance military missiles, the emphasis is placed on costs, particularly for mass industrial productions and very large missiles. This emphasis is not only on the production costs but also on the development costs, implying significant changes in the methods of development.

ALAIN DAVENAS

1993-01-01T23:59:59.000Z

145

Condition monitoring requirements for the development of a space nuclear propulsion module  

SciTech Connect

To facilitate the development of a space nuclear propulsion module for manned flights to Mars, requirements must be established early in the technology cycle. The long lead times for the acquisition of the engine system and nuclear test facilities demands that the engine system, size, performance, safety goals and condition monitoring philosophy be defined at the earliest possible time. These systems are highly complex and require a large multi-disciplinary systems engineering team to develop and track the requirements and to ensure that the as-built system reflects the intent of the mission. An effective methodology has been devised coupled with sophisticated computer tools to effectivly develop and interpret the functional requirements. These requirements can then be decomposed down to the specification level for implementation. This paper discusses the application of the methodology and the analyses to develop condition monitoring requirements under a contract with the National Aeronautics and Space Administration (NASA) Lewis Research Center (LeRC) Nuclear Propulsion Office (NPO).

Wagner, R.C.

1993-12-31T23:59:59.000Z

146

NASA/CP-2010-216215 Proceedings of the Second NASA Formal  

E-Print Network (OSTI)

April 2010 NASA/CP-2010-216215 Proceedings of the Second NASA Formal Methods Symposium Edited by César Muñoz NASA Langley Research Center, Hampton, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

Muñoz, César A.

147

NASA's Metering Plan | Department of Energy  

Energy Savers (EERE)

NASA's Metering Plan NASA's Metering Plan Presentation covers NASA's Meterting Plan and is given at the FUPWG 2006 Spring meeting, held on May 3-4, 2006 in Atlanta, Georgia....

148

ARM - Campaign Instrument - dc8-nasa  

NLE Websites -- All DOE Office Websites (Extended Search)

govInstrumentsdc8-nasa Comments? We would love to hear from you Send us a note below or call us at 1-888-ARM-DATA. Send Campaign Instrument : NASA DC-8 (DC8-NASA) Instrument...

149

Radiofrequency in propulsion application to commercial satellites  

SciTech Connect

Application of the RITA ion propulsion system for the Eureca and SAT-2 missions is considered. In the RITA-10 system, xenon is stored at 50-60 bar in a pressure tank, a pressure reduction device reduces the variable high pressure to a constant pressure of 1.5 bar, and a single unit controls the mass flow independently for both the thruster and the neutralizer. The present thruster does not employ isolators between the discharge chamber and the structure, and it achieves thrust level variation by variation of the RF power at constant exhaust velocity. The RF ionizaton system does not require constant generation of electrons during discharge operation. For SAT-2, the requirements are for a thrust level of 15 mN + or - 5 percent and a lifetime of 7000 hours per thruster.

Bassner, H.F.; Berg, H.P.; Kukies, R.

1989-01-01T23:59:59.000Z

150

2007 Propulsion Materials Annual Progress Report  

NLE Websites -- All DOE Office Websites (Extended Search)

Vehicle t echnologies Progra M Less dependence on foreign oil today, and transition to a petroleum-free, emissions-free vehicle tomorrow. 2 0 0 7 a n n u a l p r o g r e s s r e p o r t U.S. Department of Energy Office of Vehicle Technologies 1000 Independence Avenue S.W. Washington, DC 20585-0121 FY 2007 Progress Report for Propulsion Materials Energy Efficiency and Renewable Energy Office of Vehicle Technologies Advanced Materials Technologies Edward J. Wall Program Manager, OVT Rogelio A. Sullivan Advanced Materials Technologies Team Leader Jerry L. Gibbs Technology Manager January 2008 CONTENTS INTRODUCTION..................................................................................................................................... 1 PROJECT 18518 - MATERIALS FOR HIGH EFFICIENCY ENGINES......................................... 9

151

J_{E_T}: A Global Jet Finding Algorithm  

E-Print Network (OSTI)

We introduce a new jet-finding algorithm for a hadron collider based on maximizing a J_{E_T} function for all possible combinations of particles in an event. This function prefers a larger value of the jet transverse energy and a smaller value of the jet mass. The jet shape is proved to be a circular cone in Cartesian coordinates with the geometric center shifted from the jet momentum toward the central region. The jet cone size shrinks for a more forward jet. We have implemented our J_{E_T} algorithm with a reasonable running time scaling as N n^3, where "N" is the total number of particles and "n" (much less than N) is the number of particles in a fiducial region. Many features of our J_{E_T} jets are similar to anti-k_t jets, including the reconstructed jet momentum and the "back-reaction" from soft contamination. Nevertheless, when the jet parameters in the two algorithms are matched using QCD jets, we find that the J_{E_T} algorithm has a larger efficiency than anti-k_t for identifying objects with hard splittings such as a W-jet.

Yang Bai; Zhenyu Han; Ran Lu

2014-11-13T23:59:59.000Z

152

Heatpipe space power and propulsion systems  

SciTech Connect

Safe, reliable, low-mass space power and propulsion systems could have numerous civilian and military applications. This paper discusses two fission-powered concepts: the Heatpipe Power System (HPS) that provides power only, and the Heatpipe Bimodal System (HBS) that provides both power and thermal propulsion. Both concepts have 10 important features. First, only existing technology and recently tested fuel forms are used. Second, fuel can be removed whenever desired, greatly facilitating system fabrication and handling. Third, full electrically heated system testing is possible, with minimal operations required to replace the heaters with fuel and ready the system for launch. Fourth, the systems are passively subcritical during launch accidents. Fifth, a modular approach is used, and most technical issues can be resolved with inexpensive module tests. Sixth, bonds between dissimilar metals are minimized. Seventh, there are no single point failures during power mode operation. Eighth, fuel burnup rate is quite low to help ensure greater than 10-year system life. Ninth, there are no pumped coolant loops, and the systems can be shut down and restarted without coolant freeze/thaw concerns. Finally, a full ground nuclear test is not needed, and development costs will be low. The baseline HPS uses SNAP-10A-style thermoelectric power converters to produce 5 kWe at a system mass of about 500 kg. The unicouple thermoelectric converters have a hot shoe temperature of 1275 K and reject waste heat at 775 K. This type of thermoelectric converter has been used extensively by the space program, demonstrating an operational lifetime of decades. At higher thermal power, the same core can produce over 10 kWe using thermoelectric converters, and over 50 kWe using advanced power conversion systems.

Houts, M.G.; Poston, D.I.; Ranken, W.A.

1995-07-01T23:59:59.000Z

153

Jets from accretion discs  

Science Journals Connector (OSTI)

...been implicated in jet collimation. A particularly instruc...prototypical disc/jet system HH 30 (Burrows et al...some form of intrinsic collimation, since external density...of intrinsic magnetic collimation. There now exist measurements...from the most embedded systems, the class zero objects...

2000-01-01T23:59:59.000Z

154

BNL/NASA Radiobiology Program  

NLE Websites -- All DOE Office Websites (Extended Search)

General General Radiobiology Home AGS Description NSRL Description NSRL Images NASA Space Radiation Summer School NSRL Beam Info NSRL Users Beamline Requests Steps to Complete Prior to Your Experiment First Time Users Guide Related Links Biosciences Dept. Collider-Accelerator Dept. RHIC/AGS User Center NASA Space Research NASA-USRA Space Radiation Program Space Radiobiology A Collaborative Project sponsored by the NASA Space Radiation Program Manned space exploration in the 21st century holds exciting prospects for the advancement of science and the expansion of the human experience. Plans include the Alpha space station, an outpost on the Moon, exploration of near asteroids, and a piloted mission to Mars. However, for space exploration to go on, human crew members must be protected against the harsh environment of space, in particular, against the hazards of ionizing radiation. The radiation environment in space consists of high energy protons and high energy heavy ions (HZE).

155

NASA: Restructuring for Deep Space  

Science Journals Connector (OSTI)

President George W. Bush has challenged the United States to Return to the Moon and go to Mars and beyond through his Exploration Initiative for NASA.1...Fast-forwarding about 30 years from Apollo to the present,...

2006-01-01T23:59:59.000Z

156

NASA Keeps the Pressure On  

Science Journals Connector (OSTI)

...construct station components by a team led by Boeing. Tam estimates the company's overrun...million, and last month NASA officials and Boeing executives called Allied Signal managers...Tam, citing manufacturing problems at Boeing's plant in Huntsville, Alabama. But...

Andrew Lawler

1996-02-09T23:59:59.000Z

157

Alkali metal Rankine cycle boiler technology challenges and some potential solutions for space nuclear power and propulsion applications  

SciTech Connect

Alkali metal boilers are of interest for application to future space Rankine cycle power conversion systems. Significant progress on such boilers was accomplished in the 1960's and early 1970's, but development was not continued to operational systems since NASA's plans for future space missions were drastically curtailed in the early 1970's. In particular, piloted Mars missions were indefinitely deferred. With the announcement of the Space Exploration Initiative (SEI) in July 1989 by President Bush, interest was rekindled in challenging space missions and, consequently in space nuclear power and propulsion. Nuclear electric propulsion (NEP) and nuclear thermal propulsion (NTP) were proposed for interplanetary space vehicles, particularly for Mars missions. The potassium Rankine power conversion cycle became of interest to provide electric power for NEP vehicles and for 'dual-mode' NTP vehicles, where the same reactor could be used directly for propulsion and (with an additional coolant loop) for power. Although the boiler is not a major contributor to system mass, it is of critical importance because of its interaction with the rest of the power conversion system; it can cause problems for other components such as excess liquid droplets entering the turbine, thereby reducing its life, or more critically, it can drive instabilities-some severe enough to cause system failure. Funding for the SEI and its associated technology program from 1990 to 1993 was not sufficient to support significant new work on Rankine cycle boilers for space applications. In Fiscal Year 1994, funding for these challenging missions and technologies has again been curtailed, and planning for the future is very uncertain. The purpose of this paper is to review the technologies developed in the 1960's and 1970's in the light of the recent SEI applications. In this way, future Rankine cycle boiler programs may be conducted most efficiently.

Stone, J.R.

1994-07-01T23:59:59.000Z

158

Torque-Power-Speed Hybrid Control of Marine Electric Propulsion System  

Science Journals Connector (OSTI)

The conventional electric propulsion system is usually aimed at controlling the shaft speed only, without taking advantages of the electric propulsion motor into control strategies. This paper designs a SSP for marine electric propulsion system with ... Keywords: control, ship, marine electric propulsion, hybrid control

Guichen Zhang; Jie Ma

2010-05-01T23:59:59.000Z

159

WORKSHOP REPORT:Light-Duty Vehicles Technical Requirements and Gaps for Lightweight and Propulsion Materials  

Energy.gov (U.S. Department of Energy (DOE))

WORKSHOP REPORT:Light-Duty Vehicles Technical Requirements and Gaps for Lightweight and Propulsion Materials

160

Heat pipe cooled heat rejection subsystem modelling for nuclear electric propulsion. Final report  

SciTech Connect

NASA LeRC is currently developing a FORTRAN based computer model of a complete nuclear electric propulsion (NEP) vehicle that can be used for piloted and cargo missions to the Moon or Mars. Proposed designs feature either a Brayton or a K-Rankine power conversion cycle to drive a turbine coupled with rotary alternators. Both ion and magnetoplasmodynamic (MPD) thrusters will be considered in the model. In support of the NEP model, Rocketdyne is developing power conversion, heat rejection, and power management and distribution (PMAD) subroutines. The subroutines will be incorporated into the NEP vehicle model which will be written by NASA LeRC. The purpose is to document the heat pipe cooled heat rejection subsystem model and its supporting subroutines. The heat pipe cooled heat rejection subsystem model is designed to provide estimate of the mass and performance of the equipment used to reject heat from Brayton and Rankine cycle power conversion systems. The subroutine models the ductwork and heat pipe cooled manifold for a gas cooled Brayton; the heat sink heat exchanger, liquid loop piping, expansion compensator, pump and manifold for a liquid loop cooled Brayton; and a shear flow condenser for a K-Rankine system. In each case, the final heat rejection is made by way of a heat pipe radiator. The radiator is sized to reject the amount of heat necessary.

Moriarty, M.P.

1993-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

NASA/TM2009215726 Formally Verified Practical  

E-Print Network (OSTI)

NASA/TM­2009­215726 Formally Verified Practical Algorithms For Recovery From Loss of Separation of Aerospace, Hampton, Virginia June 2009 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Butler, Ricky W.

162

NASA Advisory Council (NAC) Meeting of the  

E-Print Network (OSTI)

NASA Advisory Council (NAC) Meeting of the Human Exploration and Operations Committee NASA Exploration and Operations Committee April 18, 2013 NASA Headquarters Washington, DC Status of the Human Exploration & Operations Mission Directorate ­ Joint Session with the NASA Advisory Committee (NAC) Science

Waliser, Duane E.

163

NASA Retrospective Plan Progress PENDING ACTIONS  

E-Print Network (OSTI)

Page | 1 NASA Retrospective Plan Progress May 2012 PENDING ACTIONS Agency/Subagency RIN /OMB) Progress updates and anticipated accomplishments Notes 1. NASA/Procurement AD60 NASA Grant and Cooperative Agreement: Change Procedures for Letter of Credit Advance Payments This rule revises the NASA Grant

Waliser, Duane E.

164

December 2003 NASA/TM--2003212809  

E-Print Network (OSTI)

December 2003 NASA/TM--2003­212809 A Gold Standards Approach to Training Instructors to Evaluate;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

165

Origins Program Update Henry Throop, NASA HQ  

E-Print Network (OSTI)

Origins Program Update Henry Throop, NASA HQ Program officer: Origins of Solar Systems (OSS Overview · Origins is one of NASA's core research & analysis (R&A) programs, focusing on... · # 1, 2, 3: NASA Planetary Science Division (Henry Throop), $6M/yr · # 4, 5: NASA Astrophysics Division (Mario

Throop, Henry

166

NASA ADVISORY COUNCIL SPACE OPERATIONS COMMITTEE  

E-Print Network (OSTI)

NASA ADVISORY COUNCIL SPACE OPERATIONS COMMITTEE February 8, 2011 NASA Headquarters Washington, DC.................................... 15 Update on NASA's Commercial Spaceflight Initiatives-- ESMD/Phil McAlister ..................... 15Ann Morgan Mr. Bob Sieck Guests Steve Beam / Public Brian Cleaver / Intern-interest Lynn Cline / NASA William

Waliser, Duane E.

167

DOE Scientist Earns Chairman's Award from Propulsion and Power Systems  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Scientist Earns Chairman's Award from Propulsion and Power Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance DOE Scientist Earns Chairman's Award from Propulsion and Power Systems Alliance October 2, 2009 - 1:00pm Addthis Washington, DC - A researcher at the Office of Fossil Energy's National Energy Technology Laboratory (NETL) has been presented with the Chairman's Award by the Propulsion and Power Systems Alliance (PPSA). Mary Anne Alvin, a physical scientist in NETL's Office of Research and Development, was recognized for her lead role in revitalizing the PPSA Materials Technical Area Team. This prestigious award is only given during a year when outstanding service is observed. The PPSA was formed in 1999 with the mission of improving coordination and collaboration among government agencies to better leverage existing federal

168

Design of repeating projectile toy based on bistable spring propulsion  

E-Print Network (OSTI)

Recently, bistable springs have been proven as a viable propulsion method for the standard 1.75" foam balls used in Nerf projectile toys. This technology was developed at M.I.T. by William Fienup and Barry Kudrowitz, who ...

Blanco, Matthew C. (Matthew Corwin)

2007-01-01T23:59:59.000Z

169

Solar Sail Propulsion: An Enabling Technology for Fundamental Physics Missions  

Science Journals Connector (OSTI)

Solar sails enable a wide range of high- ... system. They are also an enabling propulsion technology for two types of deep-space missions ... and the large-scale gravitational field of the solar system: the first...

Bernd Dachwald; Wolfgang Seboldt; Claus Lammerzahl

2008-01-01T23:59:59.000Z

170

Propulsion devices for locomotion at low-Reynolds number  

E-Print Network (OSTI)

We have designed, built, and tested three novel devices that use low-Reynolds number flows for self propulsion. The three-link swimmer is designed to swim through in a free viscous fluid using cyclic flipping motion of two ...

Chan, Brian, 1980-

2004-01-01T23:59:59.000Z

171

Diesel-electric marine propulsion grows in popularity  

SciTech Connect

A recent conference on electric ship propulsion held in London highlighted the big strides made in this field in the last few years. What has given the technology a tremendous fillip in recent years is the new generation of ac/ac electrical drives resulting from the development of reliable high-power semiconductor devices and their associated control systems. Diesel-electric propulsion systems provide flexibility both for the operation of the vessel and in the layout of the main components - gen-sets, converters, switchgear and propulsion motors, for example. Furthermore, the system enables the `power station` philosophy to be applied, with propulsion and all ship`s services being supplied from one power source. This paper discusses the main diesel electric systems available today.

Mullins, P.

1996-03-01T23:59:59.000Z

172

A Policy for Nuclear-Powered Marine Propulsion  

Science Journals Connector (OSTI)

... DISCUSSING the technical situation in its report, Nuclear Power for Ship Propulsion *, the Padmore Working Group on ... *, the Padmore Working Group on Marine Reactor Research points out that the U.S. Administration has already built an experimental ...

1964-06-27T23:59:59.000Z

173

Performance of a boundary layer ingesting propulsion system  

E-Print Network (OSTI)

This thesis presents an assessment of the aerodynamic performance of an aircraft propulsion system, with embedded engines, in the presence of aircraft fuselage boundary layer ingestion (BLI). The emphasis is on defining ...

Plas, Anglique (Anglique Pascale)

2006-01-01T23:59:59.000Z

174

Porous material and process development for electrospray propulsion applications  

E-Print Network (OSTI)

Ion electrospray propulsion devices rely on the transportation of ionic liquid propellant to emission regions where ions are extracted at high velocities. One such method involves the use of porous substrates to passively ...

Arestie, Steven Mark

2014-01-01T23:59:59.000Z

175

Application of ion electrospray propulsion to lunar and interplanetary missions  

E-Print Network (OSTI)

High specific impulse electric propulsion systems enable ambitious lunar and interplanetary missions that return a wealth of scientific data. Many of these technologies are difficult to scale down, meaning the spacecraft ...

Whitlock, Caleb W. (Caleb Wade)

2014-01-01T23:59:59.000Z

176

A doubly-fed machine for propulsion applications  

E-Print Network (OSTI)

A doubly fed machine for propulsion applications is proposed, which, given the presence of AC and DC power sources, can be utilized in order to improve efficiency, weight, volume, and sizing of the rotor power electronics. ...

Tomovich, Michael S. (Michael Stephen)

2014-01-01T23:59:59.000Z

177

Assessment of propfan propulsion systems for reduced environmental impact  

E-Print Network (OSTI)

Current aircraft engine designs tend towards higher bypass ratio, low-speed fan designs for improved fuel burn, reduced emissions and noise. Alternative propulsion concepts include counter-rotating propfans (CRPs) which ...

Peters, Andreas, Ph. D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

178

Design tool needs for space nuclear propulsion systems  

SciTech Connect

The interest in a return trip for humans to the moon and a pioneering voyage to Mars has rekindled interest in the use of nuclear reactors to provide propulsion for both piloted and robotic space vehicles. Two types of nuclear reactor-based propulsion systems are currently envisioned: nuclear thermal propulsion (NTP) and nuclear electric propulsion (NEP). The former relies on the direct heating and exhaust of a propellant within the core of the reactor, while the latter utilizes ion thruster engines for propulsion, and the nuclear reactor supplies the large amount of electrical power required to drive the engines. Another direct contrast between the NTP and NEP concepts is the length of reactor operation. The NTP nuclear rocket core is required to produce large amounts of thermal power for relatively short bursts (on the order of minutes to hours), and the NEP reactor core operates for a much longer period of time (on the order of days to months) with a steady-state electrical power output. The design of these types of nuclear reactor systems requires the use of specific analysis tools, some of which already exist and others that need considerable development. The general areas in which design tools are needed in the development of systems for space nuclear propulsion include the following: (1) neutronics design - both steady-state and transient applications including thermal feedback effects; (2) thermal-hydraulics design - again, both steady-state and transient applications with coupling to and from the neutronics design codes; (3) materials analysis tools - due to the high temperatures and high stresses required for efficient propulsion operation, increased importance will be placed on understanding the material responses; and (4) systems analysis - these codes allow optimizaiton of the entire propulsion system.

Klein, A.C. (Oregon State Univ., Corvallis (United States)); Lewis, B.R. (Atom Analysis, Inc., Portland, OR (United States))

1992-01-01T23:59:59.000Z

179

Angular Scaling In Jets  

SciTech Connect

We introduce a jet shape observable defined for an ensemble of jets in terms of two-particle angular correlations and a resolution parameter R. This quantity is infrared and collinear safe and can be interpreted as a scaling exponent for the angular distribution of mass inside the jet. For small R it is close to the value 2 as a consequence of the approximately scale invariant QCD dynamics. For large R it is sensitive to non-perturbative effects. We describe the use of this correlation function for tests of QCD, for studying underlying event and pile-up effects, and for tuning Monte Carlo event generators.

Jankowiak, Martin; Larkoski, Andrew J.; /SLAC

2012-02-17T23:59:59.000Z

180

NASA Research Areas of Interest Released by NASA HQ February 2014  

E-Print Network (OSTI)

NASA Research Areas of Interest Released by NASA HQ February 2014 NASA EPSCoR research priorities), the Office of the Chief Technologist and NASA's ten Centers. Each Mission Directorate, the Office efforts. Information about current NASA research solicitations can be found on NSPIRES at http

Maxwell, Bruce D.

Note: This page contains sample records for the topic "nasa jet propulsion" 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

NASA Research Areas of Interest Released by NASA HQ June 2012  

E-Print Network (OSTI)

NASA Research Areas of Interest Released by NASA HQ June 2012 NASA EPSCoR research priorities), the Office of the Chief Technologist and NASA's ten Centers. Each Mission Directorate, the Office efforts. Information about current NASA research solicitations can be found on NSPIRES at http

Lawrence, Rick L.

182

NASA/TP-2006-214203 Logistics Lessons Learned in NASA Space Flight  

E-Print Network (OSTI)

NASA/TP-2006-214203 Logistics Lessons Learned in NASA Space Flight William A. (Andy) Evans, United 2006 #12;NASA STI Program ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part

de Weck, Olivier L.

183

NASA Research Areas of Interest Released by NASA HQ April 2013  

E-Print Network (OSTI)

NASA Research Areas of Interest Released by NASA HQ April 2013 NASA EPSCoR research priorities), the Office of the Chief Technologist and NASA's ten Centers. Each Mission Directorate, the Office efforts. Information about current NASA research solicitations can be found on NSPIRES at http

Maxwell, Bruce D.

184

NASA Keck Time Solicitation For Professional Research Using the NASA Allocation of  

E-Print Network (OSTI)

#12;#12;NASA Keck Time Solicitation For Professional Research Using the NASA Allocation Information The NASA Exoplanet Science Institute (NExScI) is calling for proposals to use NASA's share of observing time at the W.M. Keck Observatory (WMKO). On average, NASA receives an allocation of 45 telescope

Abu-Mostafa, Yaser S.

185

2002 JET PROPULSION A N N U A L . R E P O R T  

E-Print Network (OSTI)

landing parachute. #12;MESSAGE DIRECTOR'S If the history of JPL were a book, we are on the verge and yet an- other flew by an asteroid on its way to a comet. A new ocean satellite began science

Waliser, Duane E.

186

Jet Propulsion Laboratory 1974-1975 Annual Report Cover The Manner 10 commemoratMl  

E-Print Network (OSTI)

. The hydrogen injection engine project entered the vehicle system design phase. A study on alternative would enable this eHort to interface with the Mariner Jupiter/Saturn 1977 Project at minimum cost of a national geothermal energy program and development of low-cost silicon arrays in an eHort to improve

Waliser, Duane E.

187

Electric propulsion motor for marine vehicles  

SciTech Connect

An electric propulsion motor for marine vehicles is described comprising: a disk-shaped rotor and two coaxial disk-shaped stators, the rotor being separated from each of the stators in an axial direction by an air gap; the rotor including a plurality of permanent magnets that produce a first magnetic field; each stator comprising an armature winding that is connected to a source of electrical current to produce a second magnetic field, the first and second magnetic fields being capable of interacting to create an electromagnetic torque; means for coupling the rotor to a propeller shaft for transferring the torque from the rotor to the shaft, and means for detecting the angle of the shaft; a current control means for receiving a current control signal and for employing pulse width modulation to control the source of electrical current; the current control means including means for storing compensation information related to torque variations that are a function of shaft angle; the current control means further including means connected and responsive to the shaft angle detecting means for selecting the compensation information as a function of shaft angle and means for combining the compensation information with the current control signal to control the source of electrical current such that the torque variations that are a function of shaft angle are minimized; and wherein the means for coupling the rotor to the propeller shaft includes means within the motor for isolating the shaft from sound produced by the motor.

Dade, T.B.; Leiding, K.W.; Mongeau, P.P.; Piercey, M.S.

1993-07-20T23:59:59.000Z

188

Jet and Photon Physics  

E-Print Network (OSTI)

Jet production in proton-proton collisions is one of the main phenomenological predictions of QCD. The ATLAS and CMS Collaborations have performed measurements of several jet observables at the LHC and compared their results to theoretical predictions and event generators. Useful physics input for the determination of the parton distribution functions and the strong coupling constant is provided. Photon production measurements represent another important test of QCD and show strong sensitivity to higher-order corrections.

Peruzzi, Marco

2014-01-01T23:59:59.000Z

189

Jet and photon physics  

E-Print Network (OSTI)

Jet production in proton-proton collisions is one of the main phenomenological predictions of QCD. The ATLAS and CMS Collaborations have performed measurements of several jet observables at the LHC and compared their results to theoretical predictions and event generators. Useful physics input for the determination of the parton distribution functions and the strong coupling constant is provided. Photon production measurements represent another important test of QCD and show strong sensitivity to higher-order corrections.

Marco Peruzzi; for the ATLAS; CMS Collaborations

2014-09-30T23:59:59.000Z

190

Feasibility of MHD submarine propulsion. Phase II, MHD propulsion: Testing in a two Tesla test facility  

SciTech Connect

This report describes the work performed during Phase 1 and Phase 2 of the collaborative research program established between Argonne National Laboratory (ANL) and Newport News Shipbuilding and Dry Dock Company (NNS). Phase I of the program focused on the development of computer models for Magnetohydrodynamic (MHD) propulsion. Phase 2 focused on the experimental validation of the thruster performance models and the identification, through testing, of any phenomena which may impact the attractiveness of this propulsion system for shipboard applications. The report discusses in detail the work performed in Phase 2 of the program. In Phase 2, a two Tesla test facility was designed, built, and operated. The facility test loop, its components, and their design are presented. The test matrix and its rationale are discussed. Representative experimental results of the test program are presented, and are compared to computer model predictions. In general, the results of the tests and their comparison with the predictions indicate that thephenomena affecting the performance of MHD seawater thrusters are well understood and can be accurately predicted with the developed thruster computer models.

Doss, E.D. [ed.] [Argonne National Lab., IL (United States); Sikes, W.C. [ed.] [Newport News Shipbuilding and Dry Dock Co., VA (United States)

1992-09-01T23:59:59.000Z

191

Numerical Investigation of Laser Propulsion for Transport in Water Environment  

SciTech Connect

Problems that cumber the development of the laser propulsion in atmosphere and vacuum are discussed. Based on the theory of interaction between high-intensity laser and materials, as air and water, it is proved that transport in water environment can be impulsed by laser. The process of laser propulsion in water is investigated theoretically and numerically. It shows that not only the laser induced plasma shock wave, but also the laser induced bubble oscillation shock waves and the pressure induced by the collapsing bubble can be used. Many experimental results show that the theory and the numerical results are valid. The numerical result of the contribution of every propulsion source is given in percentage. And the maximum momentum coupling coefficient Cm is given. Laser propulsion in water environment can be applied in many fields. For example, it can provide highly controllable forces of the order of micro-Newton ({mu}N) in microsystems, such as the MEMS (Micro-electromechanical Systems). It can be used as minimally invasive surgery tools of high temporal and spatial resolution. It can be used as the propulsion source in marine survey and exploitation.

Han Bing; Li Beibei; Zhang Hongchao; Chen Jun; Shen Zhonghua; Lu Jian; Ni Xiaowu [Department of Science, Nanjing University of Science and Technology, Nanjing 210094 (China)

2010-10-08T23:59:59.000Z

192

NASA STI Program... in Profile Since its founding, NASA has been dedicated  

E-Print Network (OSTI)

helping NASA maintain this important role. CONFERENCE PUBLICATION. Collected papers from scientific and technical conferences, symposia, seminars, or other meetings sponsored or co-sponsored by NASA. The NASA STI program operates under the auspices of the Agency Chief Information Officer. It collects, organizes, provides for archiving, and disseminates NASAs STI. The NASA STI program provides access to the NASA Aeronautics and Space Database and its public interface, the NASA Technical Report Server, thus providing one of the largest collections of aeronautical and space science STI in the world. Results are published in both non-NASA channels and by NASA in the NASA STI Report Series, which includes the following report types:

unknown authors

193

NASA to revamp Earth Observing System  

Science Journals Connector (OSTI)

NASA to revamp Earth Observing System ... EOS is the centerpiece of NASA's comprehensive Mission to Plant Earth, a program designed to observe simultaneously the atmosphere, oceans, and landand their interactionsfrom space. ...

PAMELA ZURER

1991-10-14T23:59:59.000Z

194

NASA spurs plans for exploration of Mars  

Science Journals Connector (OSTI)

NASA spurs plans for exploration of Mars ... In place of such high-cost missions carrying many instruments and requiring years of preparation, NASA has initiated a "smaller, faster, cheaper" approach. ...

RICHARD SELTZER

1996-08-26T23:59:59.000Z

195

NASA's Aerosol-Cloud-Ecosystems (ACE) Mission  

Science Journals Connector (OSTI)

Plans for NASAs Aerosol-Cloud-Ecosystem (ACE) mission is described. Recommended by Earth Science Decadal Survey in 2007, ACE is nominally planned for a 2021 launch. ACE is...

Starr, David O'C

196

Top Jets at the LHC  

E-Print Network (OSTI)

Physics Signatures at the LHC, talk presented at the 2007Top Jets at the LHC Leandro G. Almeida, Seung J. Lee, GiladSEPT-DPP Top Jets at the LHC Leandro G. Almeida a , Seung J.

Almeida, L.G.

2009-01-01T23:59:59.000Z

197

FY2001 Progress Report for Automotive Propulsion Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

AUTOMOTIVE PROPULSION AUTOMOTIVE PROPULSION MATERIALS 2 0 0 1 A N N U A L P R O G R E S S R E P O R T U.S. Department of Energy Energy Efficiency and Renewable Energy Office of Transportation Technologies A C K N O W L E D G E M E N T We would like to express our sincere appreciation to Argonne National Laboratory, Computer Systems Management, Inc., and Oak Ridge National Laboratory, for their artistic and technical contributions in preparing and publishing this report. In addition, we would like to thank all our program participants for their contributions to the programs and all the authors who prepared the project abstracts that comprise this report. U.S. Department of Energy Office of Advanced Automotive Technologies 1000 Independence Avenue S.W. Washington, DC 20585-0121 FY 2001 Progress Report for Propulsion Materials

198

Self-propulsion of V-shape micro-robot  

E-Print Network (OSTI)

In this paper we study the self-propulsion of a symmetric V-shape micro-robot (or V-robot) which consists of three spheres connected by two arms with an angle between them; the arms' lengths and the angle are changing periodically. Using an asymptotic procedure containing two-timing method and a distinguished limit, we obtain analytic expressions for the self-propulsion velocity and Lighthill's efficiency. The calculations show that a version of V-robot, aligned perpendicularly to the direction of self-swimming, is both the fastest one and the most efficient one. We have also shown that such $V$-robot is faster and more efficient than a linear three-sphere micro-robot. At the same time the maximal self-propulsion velocity of V-robots is significantly smaller than that of comparable microorganisms.

Vladimir A. Vladimirov

2012-09-13T23:59:59.000Z

199

Australian Science and Technology with Relevance to Beamed Energy Propulsion  

SciTech Connect

Although Australia has no Beamed Energy Propulsion programs at the present time, it is accomplishing significant scientific and technological activity that is of potential relevance to Beamed Energy Propulsion (BEP). These activities include: continual upgrading and enhancement of the Woomera Test Facility, Which is ideal for development and test of high power laser or microwave systems and the flight vehicles they would propel; collaborative development and test, with the US and UK of hypersonic missiles that embody many features needed by beam-propelled flight vehicles; hypersonic air breathing propulsion systems that embody inlet-engine-nozzle features needed for beam-riding agility by air breathing craft; and research on specially conditioned EM fields that could reduce beamed energy lost during atmospheric propagation.

Froning, H. David Jr [PO Box 180, Gumeracha SA 5233 (Australia)

2008-04-28T23:59:59.000Z

200

Photon Tools for Fuel Spray Studies in Aerospace Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Tools for Fuel Spray Studies in Aerospace Tools for Fuel Spray Studies in Aerospace Propulsion Systems Kuo-Cheng Lin, 1 Campbell D. Carter, 2 and Stephen A. Schumaker 3 1 Taitech, Inc., 1430 Oak Court, Suite 301, Beavercreek, OH 45430, USA; 2 Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45433, USA; 3 Air Force Research Laboratory, Edwards Air Force Base, CA 93524, USA Fuel injection plays an important role in establishing stable and efficient combustion inside the combustor of a liquid-fueled aerospace propulsion system. Depending on the application of interest, fuel injection conditions range from high-speed crossflows in the air-breathing propulsion systems to quiescent environments with extremely high pressures in the rocket engines. In addition to the typical liquid

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


201

Multiple jet interactions  

E-Print Network (OSTI)

Type Designation Key Direction of Traverse: A - Axial R ? Radial A CON1 N (1) (3) (2) (2) Probe Type: N - Straight, a=O' S - Slant, a=45' (3) Configuration: CON1 CON2 CON3 CON4 CONS CON6 Jets h/D X/h 8 5. 0 16 2. 5 5. 33 7. 5 8 5. 0..., h/D=8. 0 and 2 Jets, h/D=8. 0. 0. 30 SYM INFORMATION: 8 RUN 24 RCON4N X/0 40 0. 25 oo 0. 20 0. 10 0. 05 0. 00 -0 4 -0 3 -0 2 -0. 1 0 0 0. 1 0 2 0 3 0 4 TyX Fig. 24 Distribution of Turbulence Intensity for 2 Jets, b/D=16. 0. 0. 30 BYN...

Hehr, Roger James

2012-06-07T23:59:59.000Z

202

NASA seeks ideas for orbiting space tug  

Science Journals Connector (OSTI)

NASA seeks ideas for orbiting space tug ... NASA has issued a request for proposals, inviting aerospace companies to describe how they would define an Orbital Maneuvering Vehiclewhat NASA calls a kind of "smart space tug." ... However, NASA notes that the vehicle's role in support of a future space station program is viewed by many in the agency as one of its most essential attributes. ...

1984-01-16T23:59:59.000Z

203

NASA/TM--2014216600 Traffic Management Coordinator  

E-Print Network (OSTI)

weather. NASA and American Airlines (AA) have been conducting an operational trial of DWR since July 17

204

NASA?s Dark Matter & Dark Energy Programs  

Science Journals Connector (OSTI)

Abstract We present an overview of selected high value scientific results and prospects for future advances from NASA?s Dark missions, i.e., those covering dark matter (DM) and dark energy (DE). This includes current missions HST, Chandra, Swift, GALEX, Suzaku, Fermi, and future missions JWST and WFIRST. These missions and earlier ones, such as WMAP, have brought about a revolution in our understanding of the fundamental properties of the universe its age, rate of expansion, deceleration history, and composition (i.e., relative mix of luminous matter, dark matter, and dark energy). The next chapters in this story will be written by JWST and WFIRST. JWST was the highest priority of the 2000 Decadal Survey. It will observe in the near and medium infrared, and revolutionize our understanding of the high redshift universe. WFIRST is the highest ranked large space mission of the 2010 Decadal Survey. It is a NASA observatory designed to perform wide-field imaging and slitless spectroscopic surveys of the NIR sky (0.7 2.5?). WFIRST will: (i) measure the expansion history of the universe, and thereby constrain dark energy, (ii) find Earth-like planets around other stars using microlensing, and (iii) perform surveys that are ?100 times more sensitive than current NIR surveys.

N. Gehrels; J.K. Cannizzo

2013-01-01T23:59:59.000Z

205

Organic vapor jet printing system  

SciTech Connect

An organic vapor jet printing system includes a pump for increasing the pressure of an organic flux.

Forrest, Stephen R

2012-10-23T23:59:59.000Z

206

www.nasa.gov Fiscal Year  

E-Print Network (OSTI)

www.nasa.gov Fiscal Year PERFORMANCE AND ACCOUNTABILITY REPORT 2010 National Aeronautics and Space Administration #12;NASA's Performance and Accountability Report The National Aeronautics and Space Administration (NASA) produces an annual Performance and Accountability Report (PAR) to share the Agency's progress

207

NASA -RETROSPECTIVE PLAN PROGRESS January 2013  

E-Print Network (OSTI)

NASA - RETROSPECTIVE PLAN PROGRESS January 2013 Page | 1 PENDING ACTIONS Agency/Subagency RIN /OMB) Progress updates and anticipated accomplishments Notes 1. NASA/Human Capital Management AD88 Aeronautics make nonsubstantive changes to provide current information of NASA's organizations. Part 1201 describes

Waliser, Duane E.

208

NASA VLSI 2007 Mohanty, Vadlamudi and  

E-Print Network (OSTI)

NASA VLSI 2007 Mohanty, Vadlamudi and Kougianos 1 A Universal Voltage Level Converter for Multi University of North Texas dhruva@unt.edu #12;NASA VLSI 2007 Mohanty, Vadlamudi and Kougianos 2 Agenda Custom layout design at 90nm technology Conclusion and future works #12;NASA VLSI 2007 Mohanty, Vadlamudi

Mohanty, Saraju P.

209

NASA restructures for a new era  

Science Journals Connector (OSTI)

NASA restructures for a new era ... Early in 1992, the Bush Administration appointed Daniel S. Goldin, 52, to straighten out NASA. ... Goldin, who worked as a NASA engineer before beginning a 20-year career as an executive with TRW Corp., was retained by the Clinton Administration with orders to accelerate the reform. ...

WIL LEPKOWSKI

1993-10-25T23:59:59.000Z

210

NASA Asks Scientists For Voyager Proposals  

Science Journals Connector (OSTI)

NASA Asks Scientists For Voyager Proposals ... The primary objective of the mission, NASA says, is to obtain fundamental information about Mars, including the physics and chemistry of the planet body, surface, and atmosphere, with special emphasis on investigations relevant to possible Martian biology. ... NASA says that preliminary proposals should be submitted by Aug. 1, 1965. ...

1965-06-21T23:59:59.000Z

211

August 2002 NASA/TM--2002211612  

E-Print Network (OSTI)

August 2002 NASA/TM--2002­211612 Pickup Ions at Dione and Enceladus E. Sittler, R.E. Johnson, S. Jurac, J. Richardson, M. McGrath, F. Crary, D. Young, and J.E. Nordholt #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Richardson, John

212

NASA's Protein Crystal Work Gets Mixed Reviews  

Science Journals Connector (OSTI)

NASA's Protein Crystal Work Gets Mixed Reviews ... In a just released report, a National Research Council (NRC) task group agrees with NASA's critics that efforts to grow higher quality protein crystals in space have been incremental at best. ... Still, the task group offers NASA solace. ...

LOIS EMBER

2000-03-13T23:59:59.000Z

213

NASA -RETROSPECTIVE PLAN PROGRESS SEPTEMBER 2012  

E-Print Network (OSTI)

NASA - RETROSPECTIVE PLAN PROGRESS SEPTEMBER 2012 Page | 1 PENDING ACTIONS Agency/Subagency RIN groups) Progress updates and anticipated accomplishments Notes 1. NASA/Procurement AD81 Non Procurement Administrative corrections made to align with NASA's current operations and/or to comply with external

Waliser, Duane E.

214

NASA/TM--2001210880 Photographic Analysis Technique  

E-Print Network (OSTI)

NASA/TM--2001­210880 Photographic Analysis Technique for Assessing External Tank Foam Loss Events T'Farrell United Space Alliance, Huntsville, Alabama June 2001 #12;Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

Christian, Eric

215

NASA reports drop in stratospheric ozone  

Science Journals Connector (OSTI)

NASA reports drop in stratospheric ozone ... "I believe I have that evidence," asserts NASA's Heath, adding: "It's not the proofthat will take much more work. ... Public release of the NASA data analysis is somewhat premature, he says, because the paper has not yet been published. ...

1981-08-24T23:59:59.000Z

216

NASA IS LATE ON CLIMATE MISSIONS  

Science Journals Connector (OSTI)

NASA IS LATE ON CLIMATE MISSIONS ... The projects would cost roughly $1.5 billion and benefit NASA, the National Oceanic & Atmospheric Administration (NOAA), and the U.S. Geological Survey. ... A 19-member committee urged NASA to focus on 15 high-priority climate-observing missions and to start the four most important ones, dubbed Tier 1, as early as 2010. ...

DAVID PITTMAN

2010-12-20T23:59:59.000Z

217

NASA/TM2013218033 Rewriting Modulo SMT  

E-Print Network (OSTI)

NASA/TM­2013­218033 Rewriting Modulo SMT Camilo Rocha Escuela Colombiana de Ingenier´ia, Bogot´a, Colombia Jos´e Meseguer University of Illinois at Urbana-Champaign, Urbana, IL, USA C´esar A. Mu~noz NASA Langley Research Center, Hampton, VA, USA August 2013 #12;NASA STI Program . . . in Profile Since its

Muñoz, César A.

218

August 2004 NASA/TM--2004212824  

E-Print Network (OSTI)

August 2004 NASA/TM--2004­212824 Stress, Cognition, and Human Performance: A Literature Review and Conceptual Framework Mark A. Staal Ames Research Center, Moffett Field, California #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics

219

Project Management in NASA Mars Climate Orbiter  

E-Print Network (OSTI)

Report on Project Management in NASA by the Mars Climate Orbiter Mishap Investigation Board March Acknowledgements 5 Executive Summary 6 1. Introduction 10 2. The Mars Climate Orbiter Mission: Observations and Lessons Learned 15 3. A New Vision for NASA Programs and Projects 24 4. NASA's Current Program/Project

Rhoads, James

220

High performance path following for marine vehicles using azimuthing podded propulsion  

E-Print Network (OSTI)

Podded propulsion systems offer greater maneuvering possibilities for marine vehicles than conventional shaft and rudder systems. As the propulsion unit rotates about its vertical axis to a specified azimuth angle, the ...

Greytak, Matthew B. (Matthew Bardeen)

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

JOURNAL OF PROPULSION AND POWER Vol. 20, No. 5, SeptemberOctober 2004  

E-Print Network (OSTI)

turbines used in power plants and aircraft and marine propulsion. Another im- portant applicationJOURNAL OF PROPULSION AND POWER Vol. 20, No. 5, September­October 2004 Modeling of Surge in Free

Gravdahl, Jan Tommy

222

FY2003 Progress Report for Automotive Propulsion Materials Program  

NLE Websites -- All DOE Office Websites (Extended Search)

FreedomCAR and Vehicle Technologies FreedomCAR and Vehicle Technologies 1000 Independence Avenue S.W. Washington, DC 20585-0121 FY 2003 Progress Report for Automotive Propulsion Materials Program Energy Efficiency and Renewable Energy Office of FreedomCAR and Vehicle Technologies Edward Wall Program Manager December 2003 U.S. Department of Energy Office of FreedomCAR and Vehicle Technologies 1000 Independence Avenue S.W. Washington, DC 20585-0121 FY 2003 Progress Report for Automotive Propulsion Materials Program Energy Efficiency and Renewable Energy Office of FreedomCAR and Vehicle Technologies Edward Wall Program Manager December 2003 CONTENTS 1. INTRODUCTION ........................................................................................................... 1

223

Life cycle considerations in propulsion alternatives for fast vessels  

SciTech Connect

Fast vessels are being built and operated for a large range of passenger-carrying applications. Fast cargo-carrying vessels are being considered in a variety of sizes as well. A major decision in design and construction of these vessels is the propulsion system; this decision has major impacts on the operation economics as well as the operational capabilities of the vessels. Factors involved in consideration of propulsion alternatives for fast vessels are examined, with emphasis upon the total life cycle operating implications of these factors. A methodology for considering the factors is suggested, and an example is presented with results of the consideration tradeoffs.

Luck, D.L. [General Electric Co., Evendale, OH (United States). GE Marine and Industrial Engines

1996-07-01T23:59:59.000Z

224

Tutorial on nuclear thermal propulsion safety for Mars  

SciTech Connect

Safety is the prime design requirement for nuclear thermal propulsion (NTP). It must be built in at the initiation of the design process. An understanding of safety concerns is fundamental to the development of nuclear rockets for manned missions to Mars and many other applications that will be enabled or greatly enhanced by the use of nuclear propulsion. To provide an understanding of the basic issues, a tutorial has been prepared. This tutorial covers a range of topics including safety requirements and approaches to meet these requirements, risk and safety analysis methodology, NERVA reliability and safety approach, and life cycle risk assessments.

Buden, D.

1992-01-01T23:59:59.000Z

225

Tutorial on nuclear thermal propulsion safety for Mars  

SciTech Connect

Safety is the prime design requirement for nuclear thermal propulsion (NTP). It must be built in at the initiation of the design process. An understanding of safety concerns is fundamental to the development of nuclear rockets for manned missions to Mars and many other applications that will be enabled or greatly enhanced by the use of nuclear propulsion. To provide an understanding of the basic issues, a tutorial has been prepared. This tutorial covers a range of topics including safety requirements and approaches to meet these requirements, risk and safety analysis methodology, NERVA reliability and safety approach, and life cycle risk assessments.

Buden, D.

1992-08-01T23:59:59.000Z

226

Montana NASA EPSCoR NASA EPSCoR 2014 Research Group Program  

E-Print Network (OSTI)

Montana NASA EPSCoR NASA EPSCoR 2014 Research Group Program Call for Pre-proposals Introductory Note: This NASA EPSCoR Call for Pre-proposals should not be confused with the Montana Space Grant members). We anticipate that NASA will soon be issuing a Cooperative Agreement Notice (CAN

Maxwell, Bruce D.

227

NASA and Afterschool Programs: Connecting to the Future What NASA Has to Offer  

E-Print Network (OSTI)

NASA and Afterschool Programs: Connecting to the Future What NASA Has to Offer David Hammer and Janet Coffey University of Maryland, College Park When people think of what NASA has to offer science education, one natural starting place is knowledge: NASA scientists have a lot of it, from basic concepts

Hammer, David

228

Montana NASA EPSCoR NASA EPSCoR 2013 Research Group Program  

E-Print Network (OSTI)

Montana NASA EPSCoR NASA EPSCoR 2013 Research Group Program Call for Pre-proposals Introductory Note: This NASA EPSCoR Call for Pre-proposals should not be confused with the Montana Space Grant members). We anticipate that NASA will soon be issuing a Cooperative Agreement Notice (CAN

Lawrence, Rick L.

229

NASA Technical Memorandum 109172 A Strategy for Electronic Dissemination of NASA  

E-Print Network (OSTI)

NASA Technical Memorandum 109172 A Strategy for Electronic Dissemination of NASA Langley Technical Administration Langley Research Center · Hampton, Virginia 23681-0001 NASA Technical Memorandum 109172 A Strategy for Electronic Dissemination of NASA Langley Technical Publications Donna G. Roper, Mary K. McCaskill, Scott D

Nelson, Michael L.

230

NASA EPSCoR in Louisiana A NASA/BOR Research Infrastructure Development Project  

E-Print Network (OSTI)

NASA EPSCoR in Louisiana A NASA/BOR Research Infrastructure Development Project Small Equipment Grants (SEG) for RAP Awardees Sponsored by NASA and the Louisiana Board of Regents 2014 � 2015 APPLICATION GUIDELINES Initial 09/2014 #12;1 SMALL EQUIPMENT GRANTS (SEG) FOR RAP AWARDEES A NASA EPSCOR � BOR

Li, X. Rong

231

NASA Office of Inspector General Page 1 of 17 NASA's Top Management and Performance Challenges  

E-Print Network (OSTI)

NASA Office of Inspector General Page 1 of 17 NASA's Top Management and Performance Challenges November 2012 Introduction Fiscal year (FY) 2012 ended on a high note for NASA with the successful landing, NASA achieved a major milestone toward its goal of fostering the development of a commercial space

232

E-Print Network 3.0 - ab-thermonuclear space propulsion Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

thermonuclear space propulsion Search Powered by Explorit Topic List Advanced Search Sample search results for: ab-thermonuclear...

233

NASA Aeronautics Research Institute Through aeronautical research solicitations and  

E-Print Network (OSTI)

NASA Aeronautics Research Institute Through aeronautical research solicitations and hosting future challenges, the NASA Aeronautics Research Institute (NARI) promotes innovation in aeronautics across a broad internal and external to NASA. NARI, part of NASA's Aeronautics Research Mission Directorate (ARMD

234

Effect of chordwise flexibility and depth of submergence on an oscillating plate underwater propulsion system  

E-Print Network (OSTI)

by fish and some other marine animals. The primary attention was the propulsive characteristics propulsion system by Oleksandr Barannyk B.Sc. in Mathematics and Computer Sciences, Poltava State University underwater propulsion system by Oleksandr Barannyk B.Sc. in Mathematics and Computer Sciences, Poltava State

Victoria, University of

235

A Novel Simulation System for Marine Main Diesel Propulsion Remote Control  

Science Journals Connector (OSTI)

The purpose of the paper is to develop a novel simulation system for ship propulsion plant. The nonlinear mathematical model of main propulsion system of a large container ship is established, consisting of the large low speed two-stroke diesel engine, ... Keywords: simulation system, large-scale low-speed two-stroke diesel engine, marine main diesel propulsion

Yang Yang; Chen Guo; Jian-bo Sun; De-wen Yan

2011-11-01T23:59:59.000Z

236

Gasoline Jet Fuels  

E-Print Network (OSTI)

C4n= Diesel Gasoline Jet Fuels C O C5: Xylose C6 Fermentation of sugars Biofuel "Nanobowls" are inorganic catalysts that could provide the selectivity for converting sugars to fuels IACT Proposes Synthetic, Inorganic Catalysts to Produce Biofuels Current Process

Kemner, Ken

237

Jets from accretion discs  

Science Journals Connector (OSTI)

...associ- ation with relativistic processes and accretion discs in the...laboratory in which to study these processes on shorter time-scales in...astrophysics. Proc. 12th Kingston Mtg (ed. D. A. Clarke & M...astrophysical jets. II. Dynamical processes in the accretion of magnetized...

2000-01-01T23:59:59.000Z

238

Downhole jet pump  

SciTech Connect

This patient describes a well equipped to produce oil at the surface from a subterranean formation including: a casing string cemented in a well bore penetrating the earth to a depth below the formation, the casing string comprising perforations extending through the casing string into communication with the formation; a packer sealed against the interior of the casing string above the formation; a tubing string inside the casing string and providing therewith an annulus, the tubing string being connected to the packer and extending upwardly to the surface, the tubing string and annulus providing a first upward path to the surface and a second downward fluid path from the surface; and a jet pump assembly including a jet pump below the packer comprising a body having an upper end, an outlet in communicating with the first fluid path, a nozzle section having a suction inlet below the packer and a power fluid inlet, means providing communication between the second fluid path and the nozzle section for delivering power fluid to the power fluid inlet and means connecting the upper jet pump body end to the tubing string comprising as J-slot receptacle secured to the upper jet pump body end having a J-slot therein, a tubular member connected with and communicating with the tubing string and having a J-slot pin on the lower end thereof removably received in the J-slot and means sealing between the J-slot receptacle and J-slot pin.

Weeks, B.R.

1988-12-13T23:59:59.000Z

239

Presentation Title Page with no NASA imagery  

NLE Websites -- All DOE Office Websites (Extended Search)

NASA Goddard Space Flight Center(GSFC) NASA Goddard Space Flight Center(GSFC) Data and Information Services Center(GES DISC) National Aeronautics and Space Administration www.nasa.gov Presentation Topics: 1)Quick overview of types of Data, Services and Tools at the GES DISC 2) Tour of GES DISC website http://disc.sci.gsfc.nasa.gov 3)Giovanni Demo: http://disc.sci.gsfc.nasa.gov/giovanni Presented by: Jennifer Brennan, NASA EOSDIS Outreach Lead, NASA GSFC, Adnet Systems Inc. 2 About GES DISC * Located within the Goddard Space Flight Center(GSFC) in Greenbelt, Maryland * Provides access to wide range of global climate data, concentrated primarily in areas of atmospheric composition, atmospheric dynamics, global precipitation, and solar irradiance. * The data center supports data from many heritage and EOS missions including Aqua,

240

State of Detonation Stability Theory and Its Application to Propulsion  

E-Print Network (OSTI)

State of Detonation Stability Theory and Its Application to Propulsion D. Scott Stewart University, Massachusetts 02139 DOI: 10.2514/1.21586 We present an overview of the current state of detonation stability or asymptotic treatments of detonations, including various asymptotic limits that appear in the literature

Kasimov, Aslan

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Maneuverability and smoke emission constraints in marine diesel propulsion  

Science Journals Connector (OSTI)

A multivariable control scheme is designed that reduces smoke generation on an experimental marine diesel engine equipped with a variable geometry turbocharger. The variable geometry turbocharger allows the improvement of the steady-state ship hydrodynamic and propulsion characteristics and requires coordination with the injected mass fuel to achieve a good transient performance.

Anna Stefanopoulou; Roy Smith

2000-01-01T23:59:59.000Z

242

Feasibility study of a nonequilibrium MHD accelerator concept for hypersonic propulsion ground testing  

SciTech Connect

A National Aeronautics and Space Administration (NASA) funded research study to evaluate the feasibility of using magnetohydrodynamic (MHD) body force accelerators to produce true air simulation for hypersonic propulsion ground testing is discussed in this paper. Testing over the airbreathing portion of a transatmospheric vehicle (TAV) hypersonic flight regime will require high quality air simulation for actual flight conditions behind a bow shock wave (forebody, pre-inlet region) for flight velocities up to Mach 16 and perhaps beyond. Material limits and chemical dissociation at high temperature limit the simulated flight Mach numbers in conventional facilities to less than Mach 12 for continuous and semi-continuous testing and less than Mach 7 for applications requiring true air chemistry. By adding kinetic energy directly to the flow, MHD accelerators avoid the high temperatures and pressures required in the reservoir region of conventional expansion facilities, allowing MHD to produce true flight conditions in flight regimes impossible with conventional facilities. The present study is intended to resolve some of the critical technical issues related to the operation of MHD at high pressure. Funding has been provided only for the first phase of a three to four year feasibility study that would culminate in the demonstration of MHD acceleration under conditions required to produce true flight conditions behind a bow shock wave to flight Mach numbers of 16 or greater. MHD critical issues and a program plan to resolve these are discussed.

Lee, Ying-Ming; Simmons, G.A.; Nelson, G.L. [MSE Inc., Butte, MT (United States)

1995-12-31T23:59:59.000Z

243

MAGIC A YEAR-LONG INVESTIGATION OF MARINE CLOUDS IN THE PACIFIC  

E-Print Network (OSTI)

MAGIC ­ A YEAR-LONG INVESTIGATION OF MARINE CLOUDS IN THE PACIFIC Ernie R. Lewis1 , Warren J of the Netherlands (KMNI), The Netherlands; 10 NASA Jet Propulsion Laboratory, Pasadena, CA; 11 University

Homes, Christopher C.

244

Remote Sensing Seminar Maddy Russell  

E-Print Network (OSTI)

Center for Marine Policy Biliana Cicin-Sain, Co-PI College of Marine and Earth Science, now College of Earth Ocean and Environment Victor Klemas, Miriam Balgos, Jo Young-Heon NASA-Jet Propulsion Lab W

Firestone, Jeremy

245

Dear Prospective NASA EPSCoR Researchers: The NASA EPSCoR Cooperative Agreement Notice is released each year on the NASA NSPIRES  

E-Print Network (OSTI)

Dear Prospective NASA EPSCoR Researchers: The NASA EPSCoR Cooperative Agreement Notice is released each year on the NASA NSPIRES web site. The timing of this release is highly variable, so please check the NASA website frequently for updates. The Hawaii Space Grant Consortium (HSGC) is required by NASA

Wang, Yuqing

246

Modified shielding jet model for twin-jet shielding analysis  

E-Print Network (OSTI)

the slowing of the jet flow due to turbulent mixing and entrainment of particles from the surrounding medium. The empirical formulations and velocity profiles derived for the respective regions of the jet consider this increase in entrained fluid... velocity profiles are integrated over their respective cross sections of the shielding jet to determine the total volumetric flowrate at the specified locations. A slug flow velocity approximation is then determined for each of the desired downstream...

Gilbride, Jennifer Frances

2012-06-07T23:59:59.000Z

247

V+jets production at the CMS  

E-Print Network (OSTI)

Measurements of Vector Boson production in association with jets are presented, using p-p collision data at sqrt{s} = 7 TeV. The measurements presented include Z + jets azimuthal correlations, event shapes, vector boson + jets differential cross section measurements, hard double-parton scattering using W + jets events and electroweak Z + forward - backward jet production.

B. Bilin; for the CMS Collaboration

2014-10-22T23:59:59.000Z

248

UESC Project Overview: NASA Ames Research Center  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NASA Ames Research Center NASA Ames Research Center Utility Energy Services Contract Project Overview Federal Utilities Partnership Working Group Philadelphia, PA October 2011 NASA Ames Research Center Utility Energy Services Contract 2 Today's Discussion * NASA Ames Research Center (ARC) Energy Challenges * UESC Project Goals * Energy and Water Conservation Projects * Project Benefits and Results * Q&A NASA Ames Research Center Utility Energy Services Contract 3 NASA's Energy Challenges * Compliance with federal mandates - EISA, EPAct, Executive Orders (prior to UESC ARC was behind all of its goals) * Very low electric cost (<$0.05/kWh) * Not eligible for electric incentives through local utility (ARC purchases power from WAPA) * Aging mechanical and electrical infrastructure requiring significant

249

BNL NASA Space Radiation Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Illumination Levels in NASA Support Rooms in Medical and NSRL Facilities Illumination Levels in NASA Support Rooms in Medical and NSRL Facilities A. Readings in Medical Room Macro-Environment Micro-Environment Macro-Environment Micro-Environment (in Foot Candles) (in Foot Candles) (in Lux) (in Lux) 9-274 21.5 3.5 231 37.7 11-143 58 3.8 624 40.9 11-211 58 4.2 624 45.2 11-212 35 4.5 377 48.4 11-213 44 4.3 474 46.3 11-214 36.5 5.5 393 59.2 11-221 51 6.2 549 66.7 11-231 24.5 2.9 264 31.2 11-232 37.5 3.5 404 37.7 11-244 35.5 2.8 382 30.1 B. Readings in NSRL Room Macro-Environment Micro-Environment Macro-Environment Micro-Environment (in Foot Candles) (in Foot Candles) (in Lux) (in Lux) A-1 57 24 613 258 A-2 81.5 32 877 344 A-3 51 11.8 549 127 Top of Page Last Modified: July 15, 2008

250

NASA makes plans for Earth surveillance  

Science Journals Connector (OSTI)

NASA makes plans for Earth surveillance ... Some 200 scientists met at the National Aeronautics & Space Administration's Goddard Space Flight Center in Greenbelt, Md., to do some detailed planning for what NASA administrators are describing as "potentially the largest scientific undertaking in the history of spaceflight." ... The EOS measurements, which will be taken from platforms circling the globe in polar orbit, are the first part of an even larger program laid out by NASA as "Mission to Planet Earth." ...

PAMELA ZURER

1989-03-27T23:59:59.000Z

251

NASA's Laser Communications Relay Demonstration Project  

Science Journals Connector (OSTI)

This paper provides an overview of NASA's Laser Communications Relay Demonstration Project (LCRD). LCRD will provide two years of continuous high data rate optical communications as a...

Edwards, Bernard L; Fletcher, Andrew

252

NASA High Contrast Imaging for Exoplanets  

Science Journals Connector (OSTI)

Described is NASA's ongoing program for detection and characterization of exo-solar planets via high-contrast imaging. Some of the more promising proposed techniques under assessment...

Lyon, Richard

253

NASA's Hidden Power: NACA/NASA Public Relations and the Cold War, 1945-1967.  

E-Print Network (OSTI)

??During the 1960s, NASAs human spaceflight program commanded national and international attention. The program created American images infused with heroic values. What were these images? (more)

Starr, Kristen

2008-01-01T23:59:59.000Z

254

BNL experiment with gas jet  

NLE Websites -- All DOE Office Websites (Extended Search)

project: Study of Hot Electron Transport and Subsequent Ion Acceleration using Overdense Gas Jet Target and Ultrafast TW CO2 Laser System Vitaly Yakimenko, Igor Pogorelsky ATF,...

255

Jet Charge at the LHC  

Science Journals Connector (OSTI)

Knowing the charge of the parton initiating a light-quark jet could be extremely useful both for testing aspects of the standard model and for characterizing potential beyond-the-standard-model signals. We show that despite the complications of hadronization and out-of-jet radiation such as pileup, a weighted sum of the charges of a jets constituents can be used at the LHC to distinguish among jets with different charges. Potential applications include measuring electroweak quantum numbers of hadronically decaying resonances or supersymmetric particles, as well as standard model tests, such as jet charge in dijet events or in hadronically decaying W bosons in tt events. We develop a systematically improvable method to calculate moments of these charge distributions by combining multihadron fragmentation functions with perturbative jet functions and pertubative evolution equations. We show that the dependence on energy and jet size for the average and width of the jet charge can be calculated despite the large experimental uncertainty on fragmentation functions. These calculations can provide a validation tool for data independent of MonteCarlo fragmentation models.

David Krohn; Matthew D. Schwartz; Tongyan Lin; Wouter J. Waalewijn

2013-05-21T23:59:59.000Z

256

Plasma jets key to enduring solar mystery  

Science Journals Connector (OSTI)

... a few million degrees? The answer, researchers say, might lie in hot jets of plasma erupting from the Sun's surface. ... erupting from the Sun's surface. Plasma jets have also been considered as a possible heating mechanism. These jets are known ...

Jon Cartwright

2011-01-06T23:59:59.000Z

257

The Dynamics of Baroclinic Zonal Jets  

Science Journals Connector (OSTI)

Multiple alternating zonal jets are a ubiquitous feature of planetary atmospheres and oceans. However, most studies to date have focused on the special case of barotropic jets. Here we investigate the dynamics of freely evolving baroclinic jets, ...

Paul D. Williams; Christopher W. Kelsall

258

Enabling Green Energy and Propulsion Systems via Direct Noise Computation |  

NLE Websites -- All DOE Office Websites (Extended Search)

High-fidelity simulation of exhaust nozzle under installed configuration High-fidelity simulation of exhaust nozzle under installed configuration Umesh Paliath, GE Global Research; Joe Insley, Argonne National Laboratory Enabling Green Energy and Propulsion Systems via Direct Noise Computation PI Name: Umesh Paliath PI Email: paliath@ge.com Institution: GE Global Research Allocation Program: INCITE Allocation Hours at ALCF: 105 Million Year: 2013 Research Domain: Engineering GE Global Research is using the Argonne Leadership Computing Facility (ALCF) to deliver significant improvements in efficiency, (renewable's) yield and lower emissions (noise) for advanced energy and propulsion systems. Understanding the fundamental physics of turbulent mixing has the potential to transform product design for components such as airfoils and

259

MHK Technologies/Wave Energy Propulsion | Open Energy Information  

Open Energy Info (EERE)

< MHK Technologies < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Wave Energy Propulsion.jpg Technology Profile Primary Organization Kneider Innovations Technology Resource Click here Wave Technology Type Click here Attenuator Technology Description The device concept is a converter of the vertical potential energy moving wave to push the boat on horizontal kinetic motion Optimum Marine/Riverline Conditions The device is compliant for boat navigating on sea and oceans or lakes when water levels are changing cyclicly waves Technology Dimensions Device Testing Date Submitted 18:32.0 << Return to the MHK database homepage Retrieved from "http://en.openei.org/w/index.php?title=MHK_Technologies/Wave_Energy_Propulsion&oldid=681483"

260

BNL NASA Space Radiation Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Purpose: To use beams of heavy ions provided by the Booster accelerator at Brookhaven to study the effects of simulated space radiation on biological and physical systems, with the goal of developing methods and materials to reduce the risk to human beings on prolonged space missions of the effects of ionizing radiation Sponsor: National Aeronautics and Space Administration (NASA) Project cost $34 million over 4 years Operating costs Nearly $8 million per year in 2007 Features * beams of heavy ions extracted from the Booster accelerator with masses and energies similar to the cosmic rays encountered in space: * 1-billion electron volt (GeV)/nucleon iron-56 * 0.3-GeV/nucleon gold-97 * 0.6-GeV/nucleon silicon-28 * 1-GeV/nucleon protons * 1-GeV/nucleon titanium

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Performance and Controllability of Pulsed Ion Beam Ablation Propulsion  

SciTech Connect

We propose novel propulsion driven by ablation plasma pressures produced by the irradiation of pulsed ion beams onto a propellant. The ion beam ablation propulsion demonstrates by a thin foil (50 {mu}mt), and the flyer velocity of 7.7 km/s at the ion beam energy density of 2 kJ/cm2 adopted by using the Time-of-flight method is observed numerically and experimentally. We estimate the performance of the ion beam ablation propulsion as specific impulse of 3600 s and impulse bit density of 1700 Ns/m2 obtained from the demonstration results. In the numerical analysis, a one-dimensional hydrodynamic model with ion beam energy depositions is used. The control of the ion beam kinetic energy is only improvement of the performance but also propellant consumption. The spacecraft driven by the ion beam ablation provides high performance efficiency with short-pulsed ion beam irradiation. The numerical results of the advanced model explained latent heat and real gas equation of state agreed well with experimental ones over a wide range of the incident ion beam energy density.

Yazawa, Masaru; Buttapeng, Chainarong; Harada, Nobuhiro [Nagaoka University of Technology, Department of Electrical Engineering, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan); Suematsu, Hisayuki; Jiang Weihua; Yatsui, Kiyoshi [Nagaoka University of Technology, Extreme Energy-Density Research Institute, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188 (Japan)

2006-05-02T23:59:59.000Z

262

Sustainable Alternative Jet Fuels | Department of Energy  

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

Sustainable Alternative Jet Fuels Sustainable Alternative Jet Fuels Nate Brown, Federal Aviation Administration, presentation at the Industry Roundtable on Update on ASTM Approval....

263

NASA/SP-2007-6105 Systems Engineering  

E-Print Network (OSTI)

NASA/SP-2007-6105 Rev1 NASA Systems Engineering Handbook #12;NASA STI Program...in Profile Since its founding, the National Aeronautics and Space Administration (NASA) has been dedicated to the ad- vancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) program

Rhoads, James

264

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Launch Press Kit #12;#12; Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 #12;#12;5 THEMIS Media Contacts NASA Headquarters Dwayne Brown/Tabatha Thompson Policy/Program Management 202/58-726/895 dwayne .c .brown@nasa .gov tabatha .thompson-@nasa .gov NASA Goddard Space Flight

Waliser, Duane E.

265

You and NASA National Aeronautics and Space Administration  

E-Print Network (OSTI)

You and NASA National Aeronautics and Space Administration NASA Aeronautics Research Mission Directorate #12;Start Here: www.aeronautics.nasa.gov The first "A" in "NASA" stands for "Aeronautics"-- "National Aeronautics and Space Administration." Aeronautics has been part of NASA for more than 50 years

Waliser, Duane E.

266

NASA/SP2009566-ADD Human Exploration of Mars  

E-Print Network (OSTI)

NASA/SP­2009­566-ADD Human Exploration of Mars Design Reference Architecture 5.0 Addendum Mars Architecture Steering Group NASA Headquarters Bret G. Drake, editor NASA Johnson Space Center, Houston, Texas July 2009 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been dedicated

Waliser, Duane E.

267

NASA/TM2009000000 From Verified Models to Verifiable  

E-Print Network (OSTI)

NASA/TM­2009­000000 From Verified Models to Verifiable Code Leonard Lensink L.Lensink@cs.ru.nl Radboud University Nijmegen, The Netherlands C´esar Mu~noz cesar.a.munoz@nasa.gov NASA Langley Research, Hampton, Virginia, USA June 2009 #12;NASA STI Program . . . in Profile Since its founding, NASA has been

Muñoz, César A.

268

Science at NASAScience at NASA Waleed Abdalati  

E-Print Network (OSTI)

, and efficiency of aeronautical and space vehicles; 3) The development and operation of vehicles capable Biological and Physical Processes in the Space Environmentthe Space Environment #12;NASA Organizational Chart #12;NASA Organizational Chart OCSOffice of the d i i OCTAdministrator SMDARMD Centers SMD S0MD

269

Astronaut tipped to lead NASA science division  

Science Journals Connector (OSTI)

... John Grunsfeld, an astrophysicist and astronaut who fixed the Hubble Space Telescope, has been chosen ... NASAs science mission directorate, according to several sources with knowledge of the selection. John is a very capable guy, says Weiler. He knows both the human and ...

Eric Hand

2011-11-21T23:59:59.000Z

270

Senate Raps NASA on Cost Overruns  

Science Journals Connector (OSTI)

...report, meanwhile, had harsh words for Boeing, the station's prime U.S. contractor...NASA space flight chief Wilbur Trafton, Boeing defense and space group president Alan...hardware. The problems with Russia and Boeing leave NASA with little room to maneuver...

Andrew Lawler

1997-06-27T23:59:59.000Z

271

NASA Perspectives on Cryo H2 Storage  

NLE Websites -- All DOE Office Websites (Extended Search)

Perspectives on Cryo H2 Perspectives on Cryo H2 Storage DOE Hydrogen Storage Workshop Marriott Crystal Gateway Arlington, VA February 15, 2011 David J. Chato NASA Glenn Research Center Michael P. Doherty NASA Glenn Research Center 2 Objectives Purposes of this Presentation * To show the role of Cryogenics in NASA prior missions * To show recent NASA accomplishments in cryogenic fluid management technology * To highlight the importance of long term cryogenic storage to future NASA missions (especially Human Space flight) 3 What is Cryogenic Fluid Management? 3 The Cartoon Guide to Cryogenic Fluid Management Illustrating Key Concepts in Iconic Form 4 GRC Cryogenic Fluid Management Accomplishments Pioneering cryogenic propellant properties, behavior, and instrumentation studies 1960s-70s 1962-> Centaur

272

NASA Web Site Privacy and Important Notices  

NLE Websites -- All DOE Office Websites (Extended Search)

NASA Web Privacy Policy NASA Web Privacy Policy Thank you for visiting NASA and reviewing our policy notices. We have integrated these statements into a single posting for ease of use. The following links will help you navigate to a specific section: Privacy Policy Security Notice Accessibility Statement Linking Policy and Disclaimer of Endorsement Privacy Policy This notice provides NASA's policy regarding the nature, purpose, use and sharing of any information collected via this Web site. The information you provide on a NASA Web site will be used only for its intended purpose. We will protect your information consistent with the principles of the Privacy Act, the e-Government act of 2002, the Federal Records Act, and as applicable, the Freedom of Information Act. Submitting information is strictly voluntary. By doing so, you are giving

273

import gov.nasa.jpf.Config;1 import gov.nasa.jpf.PropertyListenerAdapter;  

E-Print Network (OSTI)

import gov.nasa.jpf.Config;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 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 import gov.nasa.jpf.PropertyListenerAdapter; import gov.nasa.jpf.VM; import gov.nasa.jpf.jvm.ClassInfo; import gov.nasa.jpf.jvm.ElementInfo; import

Hagiya, Masami

274

Mercury Jet Studies Tristan Davenne  

E-Print Network (OSTI)

Mercury Jet Studies Tristan Davenne Rutherford Appleton Laboratory Joint UKNF, INO, UKIERI meeting mercury target and reported a radial velocity at surface of mercury jet due to proton beam is 36m/s #12;Numerical simulation of Sievers & Pugnat Result Click on image above to watch video of 2cm mercury target

McDonald, Kirk

275

OPENING ANGLES OF COLLAPSAR JETS  

SciTech Connect

We investigate the jet propagation and breakout from the stellar progenitor for gamma-ray burst (GRB) collapsars by performing two-dimensional relativistic hydrodynamic simulations and analytical modeling. We find that the jet opening angle is given by ?{sub j} ? 1/5?{sub 0} and infer the initial Lorentz factor of the jet at the central engine, ?{sub 0}, is a few for existing observations of ?{sub j}. The jet keeps the Lorentz factor low inside the star by converging cylindrically via collimation shocks under the cocoon pressure and accelerates at jet breakout before the free expansion to a hollow-cone structure. In this new picture, the GRB duration is determined by the sound crossing time of the cocoon, after which the opening angle widens, reducing the apparent luminosity. Some bursts violating the maximum opening angle ?{sub j,{sub max}} ? 1/5 ? 12 imply the existence of a baryon-rich sheath or a long-acting jet. We can explain the slopes in both Amati and Yonetoku spectral relations using an off-centered photosphere model, if we make only one assumption that the total jet luminosity is proportional to the initial Lorentz factor of the jet. We also numerically calibrate the pre-breakout model (Bromberg et al.) for later use.

Mizuta, Akira; Ioka, Kunihito [Theory Center, Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801 (Japan)

2013-11-10T23:59:59.000Z

276

Integrated null-flux suspension and multiphase propulsion system for magnetically-levitated vehicles  

DOE Patents (OSTI)

This report discusses a propulsion and stabilization system comprising a series of figure 8 coils mounted vertically on the walls of the guideway to provide suspension, lateral guidance and propulsion of a magnetically levitated vehicle. This system further allows for altering the magnetic field effects by changing the relative position of the loops comprising the figure 8 coils either longitudinally and/or vertically with resulting changes in the propulsion, the vertical stability, and the suspension.

Rote, D.M.; He, Jianliang; Johnson, L.R.

1992-01-01T23:59:59.000Z

277

NASA TLX: Software for assessing subjective mental workload  

Science Journals Connector (OSTI)

The NASA Task Load Index (TLX) is a ... program for implementing a computerized version of the NASA TLX is described. The software version assists ... PC with Windows 2000 or higher. The NASA TLX program is avail...

Alex Cao; Keshav K. Chintamani; Abhilash K. Pandya

2009-02-01T23:59:59.000Z

278

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Fiscal Year 2011 Performance & Accountability Report #12;NASA's Performance and Accountability Report The National Aeronautics and Space Administration (NASA) produces an annual Performance and Accountability Report (PAR) to share the Agency

279

245NASA FY 2011 Performance and Accountability Report Other Accompanying  

E-Print Network (OSTI)

245NASA FY 2011 Performance and Accountability Report Other Accompanying Information Office of Inspector General Letter on NASA's Top Management and Performance Challenges 247 FY 2011 Inspector General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267 NASA's Audit Follow-up Program

280

Preliminary finite element modeling of a piezoelectric actuated marine propulsion fin.  

E-Print Network (OSTI)

??New technologies surrounding composite materials and autonomous underwater vehicle (AUV) design have led to numerous studies involving the marine propulsion for these AUVs. AUVs traditionally (more)

Streett, Andrew

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Preliminary Finite Element Modeling of a Piezoelectric Actuated Marine Propulsion Fin.  

E-Print Network (OSTI)

?? New technologies surrounding composite materials and autonomous underwater vehicle (AUV) design have led to numerous studies involving the marine propulsion for these AUVs. AUVs (more)

Streett, Andrew R.

2006-01-01T23:59:59.000Z

282

High Fidelity Radiative Thermal Transport Simulations of a Scramjet Propulsion System.  

E-Print Network (OSTI)

??Scramjets are a type of air breathing propulsion system that have the potential to efficiently provide thrust for atmospheric vehicles at high speeds. Defining the (more)

Irvine, Adam Glenn

2013-01-01T23:59:59.000Z

283

E-Print Network 3.0 - advanced propulsion concepts Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

on the field emission principle... advanced technology in power conversion. The main advantages of a propulsion system based on the field emis... AS THRUSTERS FOR ELECTRIC SPACE...

284

E-Print Network 3.0 - advanced embedded propulsion Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

12;EPA Sensor... inserts 72 layer drift tube created72 layer drift tube created 12;MicroMicro--Propulsion ... Source: Boise State University, Center for...

285

Nuclear Thermal Rocket/Stage Technology Options for NASA's Future Human Exploration Missions to the Moon and Mars  

Science Journals Connector (OSTI)

The nuclear thermal rocket (NTR) provides a unique propulsion capability to planners and designers of future human exploration missions to the Moon and Mars. In addition to its high specific impulse (Isp ? 8501000 seconds) and engine thrust?to?weight ratio (? 310) the NTR can also be configured as a dual mode system capable of generating stage electrical power. At present NASA is examining a variety of mission applications for the NTR ranging from an expendable single burn trans?lunar injection (TLI) stage for NASA's First Lunar Outpost (FLO) mission to all propulsive multi?burn spacecraft supporting a split cargo/piloted sprint Mars mission architecture. Two proven solid core NTR concepts are examined ?one based on NERVA (Nuclear Engine for Rocket Vehicle Application)?derivative reactor (NDR) technology and a second concept which utilizes a ternary carbide twisted ribbon fuel form developed by the Commonwealth of Independent States (CIS). Integrated systems and mission study results are used in designing aerobraked and all propulsive Mars vehicle concepts which are mass? and volume?compatible with both a reference 240 metric tonne (t) heavy lift launch vehicle (HLLV) and a smaller 120 t HLLV option. For the aerobraked scenario the 2010 piloted mission determines the size of the expendable trans?Mars injection (TMI) stage which is a growth version of the FLO TLI stage. An all?propulsive Moon/Mars mission architecture is also described which uses common modular engine and stage hardware consisting of: (1) clustered 15 thousand pounds force (klbf) NDR or CIS engines; (2) two standardized liquid hydrogen (LH2) tank sizes; and (3) dual mode NTR and refrigeration system technologies for long duration missions. The modular NTR approach can form the basis for a faster safer and cheaper space transportation system for tomorrow's piloted missions to the Moon and Mars.

Stanley K. Borowski; Robert R. Corban; Melissa L. McGuire; Erik G. Beke

1994-01-01T23:59:59.000Z

286

NASA's Marshall Space Flight Center Improves Cooling System Performanc...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

10: Cooling Towers (Revised) (Fact Sheet), Federal Energy Management Program (FEMP) nasa-msfcwatercs2.pdf More Documents & Publications NASA's Marshall Space Flight Center...

287

NASA-MSU PROFESSIONAL ENHANCEMENT AWARDS APPLICATION FORM  

E-Print Network (OSTI)

NASA-MSU PROFESSIONAL ENHANCEMENT AWARDS APPLICATION FORM I. PERSONAL INFORMATION (Please PRINT and support this application for an NASA-MSU Professional Enhancement Award. ____________ Name (please print

Wu, Jianguo "Jingle"

288

Florida NASA Business Incubation Center FNBIC | Open Energy Informatio...  

Open Energy Info (EERE)

NASA Business Incubation Center FNBIC Jump to: navigation, search Name: FloridaNASA Business Incubation Center (FNBIC) Place: United States Sector: Services Product: General...

289

Micromachined chemical jet dispenser  

DOE Patents (OSTI)

A dispenser for chemical fluid samples that need to be precisely ejected in size, location, and time. The dispenser is a micro-electro-mechanical systems (MEMS) device fabricated in a bonded silicon wafer and a substrate, such as glass or silicon, using integrated circuit-like fabrication technology which is amenable to mass production. The dispensing is actuated by ultrasonic transducers that efficiently produce a pressure wave in capillaries that contain the chemicals. The 10-200 .mu.m diameter capillaries can be arranged to focus in one spot or may be arranged in a larger dense linear array (.about.200 capillaries). The dispenser is analogous to some ink jet print heads for computer printers but the fluid is not heated, thus not damaging certain samples. Major applications are in biological sample handling and in analytical chemical procedures such as environmental sample analysis, medical lab analysis, or molecular biology chemistry experiments.

Swierkowski, Steve P. (Livermore, CA)

1999-03-02T23:59:59.000Z

290

Investigation of propulsion system for large LNG ships  

Science Journals Connector (OSTI)

Requirements to move away from coal for power generation has made LNG as the most sought after fuel source, raising steep demands on its supply and production. Added to this scenario is the gradual depletion of the offshore oil and gas fields which is pushing future explorations and production activities far away into the hostile environment of deep sea. Production of gas in such environment has great technical and commercial impacts on gas business. For instance, laying gas pipes from deep sea to distant receiving terminals will be technically and economically challenging. Alternative to laying gas pipes will require installing re-liquefaction unit on board FPSOs to convert gas into liquid for transportation by sea. But, then because of increased distance between gas source and receiving terminals the current medium size LNG ships will no longer remain economical to operate. Recognizing this business scenario shipowners are making huge investments in the acquisition of large LNG ships. As power need of large LNG ships is very different from the current small ones, a variety of propulsion derivatives such as UST, DFDE, 2-Stroke DRL and Combined cycle GT have been proposed by leading engine manufacturers. Since, propulsion system constitutes major element of the ship's capital and life cycle cost, which of these options is most suited for large LNG ships is currently a major concern of the shipping industry and must be thoroughly assessed. In this paper the authors investigate relative merits of these propulsion options against the benchmark performance criteria of BOG disposal, fuel consumption, gas emissions, plant availability and overall life cycle cost.

R P Sinha; Wan Mohd Norsani Wan Nik

2012-01-01T23:59:59.000Z

291

Jets in heavy ion collisions with ATLAS  

E-Print Network (OSTI)

The energy loss of high-p_T partons provides insight into the transport properties of the medium created in relativistic heavy ion collisions. Evidence for this energy loss was first experimentally established through observation of high-p_T hadron suppression at RHIC. More recently, measurements of fully reconstructed jets have been performed at the LHC. In this summary the latest experimental results from the ATLAS collaboration on jet suppression are presented. In particular the jet suppression in inclusive jet yields, path length dependence of the jet suppression, photon-jet and Z^0-jet correlations, heavy flavor suppression, and jet fragmentation are discussed. These results establish qualitative features of the jet quenching mechanism as experimental fact and provide constraints on models of jet energy loss.

Martin Spousta; for the ATLAS Collaboration

2012-11-14T23:59:59.000Z

292

High power density propulsion/power system for underwater applications  

SciTech Connect

This patent describes a drive system for an underwater vehicle utilizing open Rankine thermodynamic cycle system having water as working fluid; steam generation means for receiving the working fluid and converting the working fluid to steam; an energy converter adapted to receive the steam and drive a propulsion means; a mixing condenser adapted to receive the steam exits the energy converter and condense the steam to a liquid; means for introducing water into the mixing condensers from a source external to the Rankine cycle, the water mixing with the working fluid to form mixed work fluid.

Blau, A.

1992-06-02T23:59:59.000Z

293

Integrated Design Platform for Marine Electric Propulsion System  

Science Journals Connector (OSTI)

As the modern vessels have become more complex comprising an increasing number of heterogeneous interdependent subsystems. This increased complexity requires new methods for the design and operation of these marine systems. An integrated design platform for marine electric propulsion system which aims to characteristic analysis of plants and systems, DCS control algorithm trim, intelligent control strategy develop of automation and operation is presented in this paper. The design process and thoughts is described in details, and the current work is introduced. The main focus of this paper is in the development of marine integrated design platform which seeks to shift ship design to a distribution, intelligent control architecture through increased automation.

Chen Yutao; Zeng Fanming; Wu Jiaming

2012-01-01T23:59:59.000Z

294

Propulsion and service power for New Orleans sternwheelers  

SciTech Connect

The spurt in designing and building casino and show boats for the U. S. inland waterways over the last few years opened up an opportunity for naval architects and marine engineers to work with a variety of imaginative boats. For example, on the newly built Grand Palais and Crescent City Queen, six 1200 r/min generator sets based on Caterpillar 3516TA engines and 1090 kW, 600-V Kato generators provide power to operate paddlewheels, Z-drives, and a complex of equipment. This paper describes the design, layout and electrical equipment and propulsion of the ships.

Clevenger, M.

1995-11-01T23:59:59.000Z

295

The Use of Steady and Pulsed Detonations for Propulsion Systems  

SciTech Connect

Objectives of the ODWE concept studies are: demonstrate the feasibility of the oblique detonation wave engine (ODWE) for hypersonic propulsion; demonstrate the existance and stability of an oblique detonation wave in hypersonic wind tunnels; develop engineering codes which predict the performance characteristics of the ODWE including specific impulse and thrust coefficients for various operating conditions; develop multi-dimensional computer codes which can model all aspects of the ODWE including fuel injection, mixing, ignition, combustion and expansion with fully detailed chemical kinetics and turbulence models; and validate the codes with experimental data use the simulations to predict the ODWE performance for conditions not easily obtained in wind tunnels.

Adelman, H.G.; Menees, G.P.; Cambier, J.L.; Bowles, J.V.

1996-02-01T23:59:59.000Z

296

ADVANCED RADIOISOTOPE HEAT SOURCE AND PROPULSION SYSTEMS FOR PLANETARY EXPLORATION  

SciTech Connect

The exploration of planetary surfaces and atmospheres may be enhanced by increasing the range and mobility of a science platform. Fundamentally, power production and availability of resources are limiting factors that must be considered for all science and exploration missions. A novel power and propulsion system is considered and discussed with reference to a long-range Mars surface exploration mission with in-situ resource utilization. Significance to applications such as sample return missions is also considered. Key material selections for radioisotope encapsulation techniques are presented.

R. C. O'Brien; S. D. Howe; J. E. Werner

2010-09-01T23:59:59.000Z

297

How Are NASA Engineers Motivated? An Analysis of Factors that Influence NASA Goddard Engineers Level of Motivation.  

E-Print Network (OSTI)

??NASA is an organization known for pushing the envelope of engineering and scientific achievement. It can be argued that engineers working for NASA are intrinsically (more)

Kea, Howard Eric

2008-01-01T23:59:59.000Z

298

Latest jet results from the Tevatron  

SciTech Connect

A brief overview of the latest status of jet physics studies at the Tevatron in proton-antiproton collisions at {radical}s = 1.96 TeV is presented. In particular, measurements of the inclusive jet production cross-section, dijet production and searches for new physics, the ratio of the 3-jet to 2-jet production cross-sections, and the three-jet mass are discussed.

Price, Darren D.

2010-05-01T23:59:59.000Z

299

A theory for radial jet reattachment flow  

E-Print Network (OSTI)

, the velocity profile and mass entrainment are given accordrng to Goertler's t. wo- dimensional free jet theory. His analysrs of a free jet also assumes that. the turbulent eddy viscosity is constant ar ross the jet. (6) For the case of laminar flow... of total jet momentum. Laminar jet flow is approximated using Schlichting's velocity profile, whereas turbulent flow calculations are made assuming Goertler's velocity profile. Momentum integral principles are applied to the flow at reattachment...

Hadden, Lynne Loise

2012-06-07T23:59:59.000Z

300

NASA GISS Surface Temperature (GISTEMP) Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

NASA GISS Surface Temperature (GISTEMP) Analysis NASA GISS Surface Temperature (GISTEMP) Analysis DOI: 10.3334/CDIAC/cli.001 Graphics Graphics data Data Contributors Hansen, J.E.,1 R. Ruedy,2 M. Sato,3 and K. Lo2 1National Aeronautics and Space Administration, 2SGT, Inc., 3Columbia University, Center for Climate Systems Research, NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025 USA Period of Record 1880-2012 (Anomalies are relative to the 1951-80 base period means.) Methods The NASA GISS Surface Temperature (GISTEMP) analysis provides a measure of the changing global surface temperature with monthly resolution for the period since 1880, when a reasonably global distribution of meteorological stations was established. The input data Hansen et al. use for the analysis, collected by many national meteorological services around the

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


301

NASA DC-8 Airborne Scanning Lidar System  

Science Journals Connector (OSTI)

A scanning lidar system is being developed for installation on the NASA DC-8 atmospheric research aircraft to support...in-situ aerosol and gas measurements. Design and objectives of the DC-8 scanning lidar are p...

Norman B. Nielsen; Edward E. Uthe

1997-01-01T23:59:59.000Z

302

NASA: Let academia lead space science  

Science Journals Connector (OSTI)

... prime example of an expensive and complicated NASA mission. With a landing scheme involving 76 pyrotechnic devices firing on time and a US$2.5-billion price tag, it is ...

Daniel N. Baker

2012-08-01T23:59:59.000Z

303

NASA Surface meteorology and Solar Energy: Methodology  

E-Print Network (OSTI)

1 NASA Surface meteorology and Solar Energy: Methodology Energy Technology (RET) projects. These climatological profiles are used for designing systems that have for implementing RETs, there are inherent problems in using them for resource assessment. Ground measurement

Firestone, Jeremy

304

Magnetohydrodynamic Production of Relativistic Jets  

Science Journals Connector (OSTI)

...of the properties of the MHD model. The diagram shows flow velocity...jet. Figure 3 Schematic diagram depicting the MHD acceleration and...of the properties of the MHD model. The diagram shows flow velocity...

David L. Meier; Shinji Koide; Yutaka Uchida

2001-01-05T23:59:59.000Z

305

Fault detection and diagnosis of a gearbox in marine propulsion systems using bispectrum analysis and artificial neural networks  

Science Journals Connector (OSTI)

A marine propulsion system is a very complicated system composed ... to the impact of the other components in marine propulsion systems. To monitor the gear conditions, ... fault features of the vibrant signal of...

Zhixiong Li; Xinping Yan; Chengqing Yuan

2011-03-01T23:59:59.000Z

306

2011 International Workshop on Detonation for Propulsion November 14-15, 2011  

E-Print Network (OSTI)

2011 International Workshop on Detonation for Propulsion November 14-15, 2011 Paradise Hotel, Busan, Korea Summary of Recent Research on Detonation Wave Engines at UTA Donald R. Wilson,* Frank K. Lu on detonation waves related to propulsion is presented in this paper. A brief historical review of the early

Texas at Arlington, University of

307

Design, fabrication and analysis of a body-caudal fin propulsion system for a microrobotic fish  

E-Print Network (OSTI)

Design, fabrication and analysis of a body-caudal fin propulsion system for a microrobotic fish Kyu and fabrica- tion of a centimeter-scale propulsion system for a robotic fish. The key to the design are customized to provide the necessary work output for the microrobotic fish. The flexure joints, electrical

Wood, Robert

308

The 32nd International Electric Propulsion Conference, Wiesbaden, Germany September 11 15, 2011  

E-Print Network (OSTI)

The 32nd International Electric Propulsion Conference, Wiesbaden, Germany September 11 ­ 15, 2011 1 Electric Propulsion Conference, Wiesbaden · Germany September 11 ­ 15, 2011 K. Matyash1 , Max-Planck-Institut für Plasmaphysik, EURATOM Association, Greifswald, D-17491, Germany R. Schneider2 , Greifswald

309

Design and Control of the Induction Motor Propulsion of an Electric Vehicle  

E-Print Network (OSTI)

Design and Control of the Induction Motor Propulsion of an Electric Vehicle B. Tabbache1,2 , A for presizing the induction motor propulsion of an Electric Vehicle (EV). Based on the EV desired performances for different induction motor-based EVs using a siding mode control technique. Index Terms--Electric Vehicle (EV

Brest, Université de

310

An Exoskeleton Using Controlled Energy Storage and Release to Aid Ankle Propulsion  

E-Print Network (OSTI)

An Exoskeleton Using Controlled Energy Storage and Release to Aid Ankle Propulsion M. Bruce Wiggin Mellon University Pittsburgh, PA, USA Abstract -- Symmetric ankle propulsion is the cornerstone of efficient human walking. The ankle plantar flexors provide the majority of the mechanical work for the step

Collins, Steven H.

311

ASPECTS OF SENSORY CUES AND PROPULSION IN MARINE ZOOPLANKTON HYDRODYNAMIC DISTURBANCES  

E-Print Network (OSTI)

ASPECTS OF SENSORY CUES AND PROPULSION IN MARINE ZOOPLANKTON HYDRODYNAMIC DISTURBANCES A Thesis Institute of Technology December 2009 #12;ASPECTS OF SENSORY CUES AND PROPULSION IN MARINE ZOOPLANKTON Peterson and his colleagues at the Hatfield Marine Station for collection and care of the Euphausia

312

RESEARCH TRAINING GROUP GRK 1095/1: "AERO-THERMODYNAMIC DESIGN OF A SCRAMJET PROPULSION SYSTEM"  

E-Print Network (OSTI)

RESEARCH TRAINING GROUP GRK 1095/1: "AERO-THERMODYNAMIC DESIGN OF A SCRAMJET PROPULSION SYSTEM" U conception. In this context only the use of a scramjet-propulsion system meets all the aerodynamic it must be mentioned that scramjet-technologies are one of the key technologies for hypersonic flight

313

American Institute of Aeronautics and Astronautics Electrolysis Propulsion for CubeSat-Scale Spacecraft  

E-Print Network (OSTI)

is becoming clear. A water-electrolysis propulsion system for 3U CubeSats is proposed that could fill the gapAmerican Institute of Aeronautics and Astronautics 1 Electrolysis Propulsion for Cube as electrolyte. With over 1 km/s of V from 1 kg of water as propellant, sample missions include compensating

Peck, Mason A.

314

Hydrodynamic Efficiency of Ablation Propulsion with Pulsed Ion Beam  

SciTech Connect

This paper presents the hydrodynamic efficiency of ablation plasma produced by pulsed ion beam on the basis of the ion beam-target interaction. We used a one-dimensional hydrodynamic fluid compressible to study the physics involved namely an ablation acceleration behavior and analyzed it as a rocketlike model in order to investigate its hydrodynamic variables for propulsion applications. These variables were estimated by the concept of ablation driven implosion in terms of ablated mass fraction, implosion efficiency, and hydrodynamic energy conversion. Herein, the energy conversion efficiency of 17.5% was achieved. In addition, the results show maximum energy efficiency of the ablation process (ablation efficiency) of 67% meaning the efficiency with which pulsed ion beam energy-ablation plasma conversion. The effects of ion beam energy deposition depth to hydrodynamic efficiency were briefly discussed. Further, an evaluation of propulsive force with high specific impulse of 4000s, total impulse of 34mN and momentum to energy ratio in the range of {mu}N/W was also analyzed.

Buttapeng, Chainarong; Yazawa, Masaru; Harada, Nobuhiro [Department of Electrical Engineering, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka 940-2188 (Japan); Suematsu, Hisayuki; Jiang Weihua; Yatsui, Kiyoshi [Extreme Energy-Density Research Institute, Nagaoka University of Technology, 1603-1, Kamitomioka, Nagaoka 940-2188 (Japan)

2006-05-02T23:59:59.000Z

315

Beamed Core Antimatter Propulsion: Engine Design and Optimization  

E-Print Network (OSTI)

A conceptual design for beamed core antimatter propulsion is reported, where electrically charged annihilation products directly generate thrust after being deflected and collimated by a magnetic nozzle. Simulations were carried out using the Geant4 (Geometry and tracking) software toolkit released by the CERN accelerator laboratory for Monte Carlo simulation of the interaction of particles with matter and fields. Geant permits a more sophisticated and comprehensive design and optimization of antimatter engines than the software environment for simulations reported by prior researchers. The main finding is that effective exhaust speeds Ve ~ 0.69c (where c is the speed of light) are feasible for charged pions in beamed core propulsion, a major improvement over the Ve ~ 0.33c estimate based on prior simulations. The improvement resulted from optimization of the geometry and the field configuration of the magnetic nozzle. Moreover, this improved performance is realized using a magnetic field on the order of 10 T at the location of its highest magnitude. Such a field could be produced with today's technology, whereas prior nozzle designs anticipated and required major advances in this area. The paper also briefly reviews prospects for production of the fuel needed for a beamed core engine.

Ronan Keane; Wei-Ming Zhang

2012-05-16T23:59:59.000Z

316

Air spring vibration isolation technology for ship propulsion engine  

Science Journals Connector (OSTI)

Propulsion engine (PE) is one of the most dominant noise sources of ship. Due to the imposed requirement of keeping alignment with propulsion shaft during operation the effective vibration isolation of PE using low frequency mount is difficult to implement as is often adopted by other onboard machinery. In this paper a low frequency air spring vibration isolation system (ASVIS) with alignment control strategy for PE is conceived and introduced. The application of ASVIS to PE presents both advantages and challenges which are discussed detailedly in the paper as well as the feasibility of the ASVIS concept. A systematic design method of ASVIS for PE is established with focus on the system mechanical behavior optimization and automatic alignment control algorithm development. An ASVIS prototype is designed and manufactured using the proposed method. The performance of the prototype is tested by a series of experiments including alignment control precision and isolation efficiency. Experimental results show that using ASVIS the vibration of PE can be attenuated to a satisfactory level with the alignment between PE and shaft being maintained in the safe range.

He Lin; Xu Wei; Shuai Changgeng

2012-01-01T23:59:59.000Z

317

Numerical Simulations of Bouncing Jets  

E-Print Network (OSTI)

Bouncing jets are fascinating phenomenons occurring under certain conditions when a jet impinges on a free surface. This effect is observed when the fluid is Newtonian and the jet falls in a bath undergoing a solid motion. It occurs also for non-Newtonian fluids when the jets falls in a vessel at rest containing the same fluid. We investigate numerically the impact of the experimental setting and the rheological properties of the fluid on the onset of the bouncing phenomenon. Our investigations show that the occurrence of a thin lubricating layer of air separating the jet and the rest of the liquid is a key factor for the bouncing of the jet to happen. The numerical technique that is used consists of a projection method for the Navier-Stokes system coupled with a level set formulation for the representation of the interface. The space approximation is done with adaptive finite elements. Adaptive refinement is shown to be very important to capture the thin layer of air that is responsible for the bouncing.

Bonito, Andrea; Lee, Sanghyun

2015-01-01T23:59:59.000Z

318

INTRODUCTION Cetaceans (whales, dolphins and porpoises) are exceptional  

E-Print Network (OSTI)

adapted to life in a marine environment. They are the only marine mammals that have achieved fast swimming not oscillate and do not generate propulsion or thrust during rectilinear locomotion. Compared to other aquatic Burrough Street, Unit #1, San Diego, CA 92111, USA, 6 NASA Jet Propulsion Laboratory, 4800 Oak Grove Drive

Fish, Frank

319

National Aeronautics and Space Administration NASA Technology Transfer Program  

E-Print Network (OSTI)

National Aeronautics and Space Administration NASA Technology Transfer Program Bringing NASA of technology transfer that NASA maximizes the benefit of the Nation's investment in cutting-edge research technology transfer has made us confident that these solutions, while originally conceived to solve NASA

Waliser, Duane E.

320

December 1998 NASA/TM-1998-208955  

E-Print Network (OSTI)

December 1998 NASA/TM-1998-208955 Creating A Canonical Scientific and Technical Information. Nelson Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

Nelson, Michael L.

Note: This page contains sample records for the topic "nasa jet propulsion" 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

October 2010 NASA/CR2010-216861  

E-Print Network (OSTI)

October 2010 NASA/CR­2010-216861 Optimizing Air Transportation Service to Metroplex Airports Part Mason University, Fairfax, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical

322

February 2007 NASA/TM-2007-214539  

E-Print Network (OSTI)

February 2007 NASA/TM-2007-214539 Preliminary Considerations for Classifying Hazards of Unmanned NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program Office plays a key

Maddalon, Jeffrey M.

323

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Entry Form for 2012 NASA Langley will become the property of the National Aeronautics and Space Administration (NASA) and will not be returned. I give permission to NASA to use, reproduce, prepare derivative works, publish, distribute copies

Christian, Eric

324

October 2008 NASA/TM-2008-215356  

E-Print Network (OSTI)

October 2008 NASA/TM-2008-215356 A Formal Framework for the Analysis of Algorithms That Recover National Institute of Aerospace, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

Muñoz, César A.

325

NASA/TP--2006214196 Haughton-Mars Project Expedition 2005  

E-Print Network (OSTI)

NASA/TP--2006­214196 Haughton-Mars Project Expedition 2005 Final Report Prof. Olivier de Weck: Press F1 key (Windows) or Help key (Mac) for help January 2006 #12;NASA STI Program ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

de Weck, Olivier L.

326

NASA HISTORY: CALENDAR YEAR 2002 IN REVIEW Introduction  

E-Print Network (OSTI)

1 NASA HISTORY: CALENDAR YEAR 2002 IN REVIEW Introduction: During 2002 the efforts of the NASA program of research pertinent to NASA leadership's concerns; effectively acquire, preserve, and make available documentary information in the NASA Historical Reference Collection; and disseminate historical

327

NASA/TP--2003210793 Lunar Surface Reference Missions  

E-Print Network (OSTI)

July 2003 NASA/TP--2003­210793 Lunar Surface Reference Missions: A Description of Human and Robotic #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

Rathbun, Julie A.

328

August 2001 NASA/TM-2001-211049  

E-Print Network (OSTI)

August 2001 NASA/TM-2001-211049 Buckets: Smart Objects for Digital Libraries Michael L. Nelson Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Nelson, Michael L.

329

www.nasa.gov Space Technology: Investments in our Future  

E-Print Network (OSTI)

www.nasa.gov Space Technology: Investments in our Future FY12 Overview March 2011 #12;OFFICE OF THE CHIEF TECHNOLOGIST www.nasa.gov/oct Space Technology: Investments in Our Future · Through NASA, America Continues to Dream Big: NASA's future aeronautics, science and exploration missions are grand in scope

Waliser, Duane E.

330

October 2010 NASA/CR2010-216860  

E-Print Network (OSTI)

October 2010 NASA/CR­2010-216860 Optimizing Air Transportation Service to Metroplex Airports Part 1;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program plays a key part

331

October 2006 NASA/CR-2006-214298  

E-Print Network (OSTI)

October 2006 NASA/CR-2006-214298 NIA Report No. 2006-01 A High-Level Formalization of Floating of Aerospace, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical

Muñoz, César A.

332

NASA Advisory Council Space Operations Committee September 2010  

E-Print Network (OSTI)

NASA Advisory Council Space Operations Committee September 2010 NASA Advisory Council Space Operations Committee Johnson Space Center September 13-14, 2010 Presented to the NASA Advisory Council on October 6, 2010 #12;NASA Advisory Council Space Operations Committee September 2010 · Col. Eileen Collins

Waliser, Duane E.

333

NASA Center Anti-Harassment Coordinators January 2013  

E-Print Network (OSTI)

NASA Center Anti-Harassment Coordinators January 2013 Name Job Title Center Phone # Emails Deb Feng Associate Director for Mission Support ARC 650-604-0256 Deborah.l.feng@nasa-276-5576 jonathan.c.brown@nasa.gov Keri Eliason (Alternate) EEO Director DFRC 661-276-3033 keri.l.eliason@nasa

Waliser, Duane E.

334

NASA/TP2009213146REVISION A International Space Station  

E-Print Network (OSTI)

NASA/TP­2009­213146­REVISION A International Space Station Science Research Accomplishments During of the International Space Station Program Scientist NASA Johnson Space Center, Houston, Texas Judy Tate-Brown, Tracy and Jennifer Rhatigan NASA Johnson Space Center, Houston, Texas June 2009 #12;THE NASA STI PROGRAM OFFICE

335

NASA/TP--2006214434 Examination of the Armagh Observatory  

E-Print Network (OSTI)

NASA/TP--2006­214434 Examination of the Armagh Observatory Annual Mean Temperature Record, 1844, Alabama July 2006 #12;The NASA STI Program Office...in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

336

February 2013 NASA/TM2013-217969  

E-Print Network (OSTI)

February 2013 NASA/TM­2013-217969 Perspectives on Unmanned Aircraft Classification for Civil, Poquoson, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information (STI) program

Maddalon, Jeffrey M.

337

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Volume 4, Issue 11 June 2008 GoddardViewNASA Composite Carrier for Hubble Servicing Mission Pg 4 NASA Technology Contributes to National Security Pg 6 One Million People Going to the Moon ­ 2 NASA Exhibit Pays Tribute to Fallen Heroes of Spaceflight

Christian, Eric

338

NASA TM-2012-217361 Evaluating Shielding Approaches to Reduce  

E-Print Network (OSTI)

NASA TM-2012-217361 Evaluating Shielding Approaches to Reduce Space Radiation Cancer Risks Francis A. Cucinotta NASA Lyndon B. Johnson Space Center Houston, Texas Myung-Hee Y. Kim U.S.R.A., Division, Texas May 2012 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been

Rathbun, Julie A.

339

November 2007 NASA/TM-2007-215088  

E-Print Network (OSTI)

November 2007 NASA/TM-2007-215088 The ANMLite Language and Logic for Specifying Planning Problems National Institute of Aerospace, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA

Muñoz, César A.

340

NASA/TM2014218280 Analysis of Well-Clear Boundary  

E-Print Network (OSTI)

NASA/TM�2014�218280 Analysis of Well-Clear Boundary Models for the Integration of UAS in the NAS Research Center, Hampton, Virginia June 2014 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific

Muñoz, César A.

Note: This page contains sample records for the topic "nasa jet propulsion" 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

November 2006 NASA/TM-2006-214518  

E-Print Network (OSTI)

November 2006 NASA/TM-2006-214518 An Abstract Plan Preparation Language Ricky W. Butler Langley;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific and Technical Information (STI) Program

Muñoz, César A.

342

January 2014 NASA/TM2014-218155  

E-Print Network (OSTI)

January 2014 NASA/TM­2014-218155 A Well-Clear Volume Based on Time to Entry Point Anthony J Center, Hampton, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information

Muñoz, César A.

343

NASA/TM-1998-208419 Buckets: Aggregative, Intelligent Agents  

E-Print Network (OSTI)

May 1998 NASA/TM-1998-208419 Buckets: Aggregative, Intelligent Agents for Publishing Michael L Dominion University, Norfolk, Virginia #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Nelson, Michael L.

344

February 2008 NASA/TM-2008-215108  

E-Print Network (OSTI)

February 2008 NASA/TM-2008-215108 A Primer on Architectural Level Fault Tolerance Ricky W. Butler Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA Scientific

Butler, Ricky W.

345

February 2013 NASA/TM-2013-217804  

E-Print Network (OSTI)

February 2013 NASA/TM-2013-217804 The Simplified Aircraft-Based Paired Approach with the ALAS Research Center, Hampton, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science. The NASA scientific and technical information

Butler, Ricky W.

346

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Produced in 2011 by the NASA Astrobiology Program to commemorate 50 years of Exobiology and Astrobiology at NASA. #2 Issue #12;Astrobiology A History of Exobiology and Astrobiology at NASA This is the story of life in the Universe--or at least

Waliser, Duane E.

347

NASA Headquarters Daniel Lockney, Technology Transfer Program Executive  

E-Print Network (OSTI)

Program Office NASA Center for AeroSpace Information Bo Schwerin, Editor Lisa Rademakers, Senior Writer

348

Production of jet fuels from coal-derived liquids. Volume 10. Jet fuels production by-products, utility, and sulfur-emissions control integration study. Interim report, 1 May 1988-1 April 1989  

SciTech Connect

In September 1986, the Fuels Branch of the Aero Propulsion Laboratory at Wright-Patterson Air Force Base, Ohio, began an investigation of the potential of jet-fuel production from the liquid by-product streams produced by the gasification of lignite at the Great Plains Gasification Plant (GPGP) in Beulah, North Dakota. Funding has been provided by the Department of Energy (DOE) Pittsburgh Energy Technology Center (PETC) to administer the experimental portion of this effort. This document reports the results of the effort by Burns and Roe Services Corporation/Science Applications International Corporation (BRSC/SAIC) to evaluate the impact of integrating Jet Fuel and/or Chemical Production Facilities with the Great Plains Gasification Plant.

Rossi, R.J.

1989-06-01T23:59:59.000Z

349

9Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Human-Centered  

E-Print Network (OSTI)

9Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center-based Reasoning Related WorkRelated Work #12;10Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Autonomous Control SystemsAutonomous Control Systems l Brings to table

Kortenkamp, David

350

NASA Research Areas of Interest NASA EPSCoR research priorities are defined by the Mission Directorates (Aeronautics Research,  

E-Print Network (OSTI)

NASA Research Areas of Interest NASA EPSCoR research priorities are defined by the Mission area of the Agency's research and technology development efforts. Information about current NASA: http://www.aeronautics.nasa.gov/programs.htm Research Opportunities in Aeronautics (ROA) http

Maxwell, Bruce D.

351

Full Fuel-Cycle Comparison of Forklift Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

3 3 Full Fuel-Cycle Comparison of Forklift Propulsion Systems Energy Systems Division About Argonne National Laboratory Argonne is a U.S. Department of Energy laboratory managed by UChicago Argonne, LLC under contract DE-AC02-06CH11357. The Laboratory's main facility is outside Chicago, at 9700 South Cass Avenue, Argonne, Illinois 60439. For information about Argonne, see www.anl.gov. Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from: U.S. Department of Energy Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831-0062 phone (865) 576-8401

352

Heavy Vehicle Propulsion Materials: Recent Progress and Future Plans  

SciTech Connect

The Heavy Vehicle Propulsion Materials Program provides enabling materials technology for the U.S. DOE Office of Heavy Vehicle Technologies (OHVT). The technical agenda for the program is based on an industry assessment and the technology roadmap for the OHVT. A five-year program plan was published in 2000. Major efforts in the program are materials for diesel engine fuel systems, exhaust aftertreatment, and air handling. Additional efforts include diesel engine valve-train materials, structural components, and thermal management. Advanced materials, including high-temperature metal alloys, intermetallics, cermets, ceramics, amorphous materials, metal- and ceramic-matrix composites, and coatings, are investigated for critical engine applications. Selected technical issues and planned and ongoing projects as well as brief summaries of several technical highlights are given.

D. Ray Johnson; Sidney Diamond

2001-05-14T23:59:59.000Z

353

Full Fuel-Cycle Comparison of Forklift Propulsion Systems  

NLE Websites -- All DOE Office Websites (Extended Search)

Full Fuel-Cycle Comparison Full Fuel-Cycle Comparison of Forklift Propulsion Systems ANL/ESD/08-3 Energy Systems Division Availability of This Report This report is available, at no cost, at http://www.osti.gov/bridge. It is also available on paper to the U.S. Department of Energy and its contractors, for a processing fee, from: U.S. Department of Energy Office of Scientific and Technical Information P.O. Box 62 Oak Ridge, TN 37831-0062 phone (865) 576-8401 fax (865) 576-5728 reports@adonis.osti.gov Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor UChicago Argonne, LLC, nor any of their employees or officers, makes any warranty, express

354

Application of the enabler to nuclear electric propulsion  

Science Journals Connector (OSTI)

This paper describes a power system concept that provides the electric power for a baseline electric propulsion system for a piloted mission to Mars. A 10?MWe space power system is formed by coupling an Enabler reactor with a simple non?recuperated closed Brayton cycle. The Enabler reactor is a gas?cooled reactor based on proven reactor technology developed under the NERVA/Rover programs. The selected power cycle which uses a helium?xenon mixture at 1920 K at the turbine inlet is diagramed and described. The specific mass of the power system over the power range from 5 to 70 MWe is given. The impact of operating life on the specific mass of a 10?MWe system is also shown.

Bill L. Pierce

1991-01-01T23:59:59.000Z

355

The Georgi Algorithms of Jet Clustering  

E-Print Network (OSTI)

We reveal the direct link between the jet clustering algorithms recently proposed by Howard Georgi and parton shower kinematics, providing sound support from the theoretical side. The kinematics of this class of elegant algorithms is explored systematically and the jet function is generalized to $J^{(n)}_\\beta$ with a jet function index $n$. Based on three basic requirements that the result of jet clustering is process-independent, for softer subjets the inclusion cone is larger, and that the cone size cannot be too large in order to avoid mixing different jets, we derive constraints on the jet function index $n$ and the jet function parameter $\\beta$ which are closely related to phase space boundaries. Finally, we demonstrate that the jet algorithm is boost invariant.

Shao-Feng Ge

2014-08-30T23:59:59.000Z

356

Coupling of twin rectangular supersonic jets  

E-Print Network (OSTI)

Twin jet plumes on aircraft can couple, producing dynamic pressures significant enough to cause structural fatigue. For closely spaced jets with a moderate aspect ratio (e.g. 5), previous work has established that two ...

Raman, G.; Taghavi, Ray

1998-01-01T23:59:59.000Z

357

Gravity waves from vortex dipoles and jets  

E-Print Network (OSTI)

The dissertation first investigates gravity wave generation and propagation from jets within idealized vortex dipoles using a nonhydrostatic mesoscale model. Several initially balanced and localized jets induced by vortex dipoles are examined here...

Wang, Shuguang

2009-05-15T23:59:59.000Z

358

Radioisotope electric propulsion of sciencecraft to the outer solar system and near-interstellar space  

SciTech Connect

Recent results are presented in the study of radioisotope electric propulsion as a near-term technology for sending small robotic sciencecraft to the outer Solar System and near-interstellar space. Radioisotope electric propulsion (REP) systems are low-thrust, ion propulsion units based on radioisotope electric generators and ion thrusters. Powerplant specific masses are expected to be in the range of 100 to 200 kg/kW of thrust power. Planetary rendezvous missions to Pluto, fast missions to the heliopause (100 AU) with the capability to decelerate an orbiter for an extended science program and prestellar missions to the first gravitational lens focus of the Sun (550 AU) are investigated.

Noble, R.J.

1998-08-01T23:59:59.000Z

359

Jet physics at HERA, Tevatron and LHC  

E-Print Network (OSTI)

In this short report, we discuss the Jet Physics results and perspectives at HERA, Tevatron and LHC.

C. Royon

2008-11-10T23:59:59.000Z

360

Jets in relativistic heavy ion collisions  

SciTech Connect

Several aspects of hard and semihard QCD jets in relativistic heavy ion collisions are discussed, including multiproduction of minijets and the interaction of a jet with dense nuclear matter. The reduction of jet quenching effect in deconfined phase of nuclear matter is speculated to provide a signature of the formation of quark gluon plasma. HIJING Monte Carlo program which can simulate events of jets production and quenching in heavy ion collisions is briefly described. 35 refs., 13 figs.

Wang, Xin-Nian; Gyulassy, M.

1990-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Production of biocomponent containing jet fuels  

Science Journals Connector (OSTI)

Recent demands for low aromatic content jet fuels have shown significant increase in the last 20 years. This was generated by the growing of aviation. Further than quality requirements were more aggravated in front of jet fuels. This was generated by ... Keywords: aromatic content, biocomponent, crystallization point, jet fuel, kerosene, vegetable oil

Z. Eller; P. Solymosi; T. Kasza; Z. Varga; J. Hancsk

2011-12-01T23:59:59.000Z

362

21Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Design of AA systemsDesign of AA systems  

E-Print Network (OSTI)

21Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center in autonomy #12;22Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Generic control system

Kortenkamp, David

363

NASA Glenn Research Center | Open Energy Information  

Open Energy Info (EERE)

NASA Glenn Research Center NASA Glenn Research Center Jump to: navigation, search Name NASA Glenn Research Center Address 21000 Brookpark Rd. Place Cleveland, Ohio Zip 44135 Sector Biofuels, Carbon, Efficiency, Renewable Energy, Solar, Wind energy Product Research and development Phone number 216-977-7135 Website http://www.nasa.gov/centers/gl Coordinates 41.418747°, -81.854496° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.418747,"lon":-81.854496,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

364

www.nasa.gov Strategic Plan  

E-Print Network (OSTI)

panels retracted into the shadows of its protective solar shield, approaches the Sun in this artist's con, an environment able to support microbial life. (Credit: NASA/JPL­Caltech) Solar Probe Plus, its primary solar- cept. Managed by the Goddard Space Flight Center, Solar Probe Plus will repeatedly sample the near

Waliser, Duane E.

365

NASA Townhall AAS 224th Meeting  

E-Print Network (OSTI)

://science.nasa.gov/astrophysics/documents/ 1 #12;HST sees Water Vapor Plumes on Europa Hydrogen Oxygen Hydrogen and oxygen emission lines from works 2. Explore how it began and evolved 3. Search for life on planets around other stars Flight telescope backplane & backplane support fixture Pathfinder (backplane center section

Christian, Eric

366

Rotating Detonation Wave Propulsion: Experimental Challenges, Modeling, and Engine Concepts (Invited)  

E-Print Network (OSTI)

Rotating Detonation Wave Propulsion: Experimental Challenges, Modeling, and Engine Concepts, Arlington, Texas, 76019 Rotating detonation engines (RDEs), also known as continuous detonation engines of energy conversion that may be even more superior than pulse detonation engines, themselves the subject

Texas at Arlington, University of

367

Fabrication and characterization of sintered porous glass emitters for electrospray propulsion  

E-Print Network (OSTI)

Ionic electrospray thrusters are promising candidates for CubeSat propulsion systems in space, due to their low power requirement and small form factor. Current technology has demonstrated thrust levels of 10 - 40[mu]N, ...

Xie, Julie

2014-01-01T23:59:59.000Z

368

An impulse framework for hydrodynamic force analysis : fish propulsion, water entry of spheres, and marine propellers  

E-Print Network (OSTI)

This thesis presents an impulse framework for analyzing the hydrodynamic forces on bodies in flow. This general theoretical framework is widely applicable, and it is used to address the hydrodynamics of fish propulsion, ...

Epps, Brenden P

2010-01-01T23:59:59.000Z

369

Vehicle Technologies Office: 2013 Propulsion Materials R&D Annual Progress Report  

Energy.gov (U.S. Department of Energy (DOE))

This report describes the progress made during 2013 on the research and development projects funded by the Propulsion Materials subprogram in the Vehicle Technologies Office. Past year's reports are listed on the Annual Progress Reports page.

370

James Walker develops Walkersele D8 a new rotary lip seal for marine propulsion systems  

Science Journals Connector (OSTI)

Walkersele D8 is a new design of rotary lip seal developed by James Walker & Co Ltd for use in marine propulsion systems to protect bearings from water ingress or prevent lubricant from leaking into the marine environment.

2012-01-01T23:59:59.000Z

371

Seeds of change Spore propulsion 23 JULY 2010 VOL 329 SCIENCE www.sciencemag.org388  

E-Print Network (OSTI)

Seeds of change Spore propulsion COMMENTARY 395392 23 JULY 2010 VOL 329 SCIENCE www or Bracing for Oil UNEASINESS HAS SETTLED ON THE UNIVERSITY OF MIAMI'S ROSENSTIEL School of Marine

Gurven, Michael

372

PC-Based Modeling and Simulation of Large Marine Propulsion Plant  

Science Journals Connector (OSTI)

At present, most of marine engine room simulators (MERS) in the ... So a simulation system of a PC-Based marine propulsion plant has been developed for training. In ... paper, a transient simulation model for lar...

Sun Jianbo; Guo Chen

2010-01-01T23:59:59.000Z

373

Optimization of Marine Propulsion Systems Alignment for Aged Ships  

Science Journals Connector (OSTI)

The paper presents a numerical method of identification parameters of marine power transmission systems alignment in the ... engine and the second one with slow-speed propulsion system. Multivariant computations...

Lech Murawski; Wieslaw Ostachowicz

2010-01-01T23:59:59.000Z

374

Research on propeller dynamic load simulation system of electric propulsion ship  

Science Journals Connector (OSTI)

A dynamic marine propeller simulation system was developed, which is ... requirement of theory research and engineering design of marine electric propulsion system. By applying an actual ship parameter...J? ? K ...

Hui Huang ? ?; Ai-di Shen ???; Jian-xin Chu ???

2013-04-01T23:59:59.000Z

375

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to ... electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathem...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

376

Research on simulation of ship electric propulsion system with flywheel energy storage system  

Science Journals Connector (OSTI)

Flywheel energy storage has been widely used to improve the ground electric power quality. This paper designed a flywheel energy storage device to improve ship electric propulsion system power grid quality. The practical mathematical models of flywheel ...

Chunling Xie; Conghui Zhang; Jen-Yuan James Chang

2011-06-01T23:59:59.000Z

377

Photoproduction of jets at NLO  

E-Print Network (OSTI)

A new next-to-leading order Monte Carlo program for the calculation of fully differential jet cross sections in photoproduction is described. The contributions from both resolved and direct components are included. A comparison between the theoretical predictions and ZEUS data is presented.

B. W. Harris; J. F. Owens

1996-08-20T23:59:59.000Z

378

The Particle Content of Extragalactic Jets  

E-Print Network (OSTI)

Recent x-ray and radio data from radio sources in galaxy clusters are used to show that the pdV work required to inflate the radio lobes exceeds all other energy estimates deduced from the radio emission. If the required jet energy density has an isotropic pressure, then in almost all cases the jet cannot be confined by an external medium. This problem can be resolved with jets dominated by cold protons, but even here the accompanying energy density in relativistic electons can cause decollimation. Electron-positron jets cannot solve this problem unless they are highly beamed with unusual energy distributions. Poynting flux jets may be a viable alternative.

David S. De Young

2006-05-31T23:59:59.000Z

379

National Aeronautics and Space Administration NASA's John C. Stennis  

E-Print Network (OSTI)

, the Rolls-Royce North America Outdoor Jet Engine Testing Facility and the Pratt & Whitney Rocketdyne rocket

380

Transforming BIM to BEM: Generation of Building Geometry for the NASA Ames Sustainability Base BIM  

E-Print Network (OSTI)

Building Geometry for the NASA Ames Sustainability Base BIMBuilding Geometry for the NASA Ames Sustainability Base BIMusing the recently constructed NASA Ames Sustainability Base

O'Donnell, James T.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Thermal-hydraulics Analysis of a Radioisotope-powered Mars Hopper Propulsion System  

SciTech Connect

Thermal-hydraulics analyses results produced using a combined suite of computational design and analysis codes are presented for the preliminary design of a concept Radioisotope Thermal Rocket (RTR) propulsion system. Modeling of the transient heating and steady state temperatures of the system is presented. Simulation results for propellant blow down during impulsive operation are also presented. The results from this study validate the feasibility of a practical thermally capacitive RTR propulsion system.

Robert C. O'Brien; Andrew C. Klein; William T. Taitano; Justice Gibson; Brian Myers; Steven D. Howe

2011-02-01T23:59:59.000Z

382

Heavy vehicle hybrid propulsion systems R and D program plan, FY 2000-2005  

SciTech Connect

This report contains the program plan and background information for the Heavy Vehicle Hybrid Propulsion R and D Program sponsored by the Department of Energy's Office of Heavy Vehicle Technologies. The program is a collaboration between industry and government established for the development of advanced hybrid-electric propulsion technology for urban cycle trucks and buses. It targets specific applications to enhance potential market success. Potential end-users are also involved.

None

2000-07-01T23:59:59.000Z

383

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

"Sungrazing" Comet - 4 Goddard Family NASA and COBE Scientists Win Top Cosmology Prize - 7 Employee Spotlight to include images from other NASA satellites, including a wide variety of land forms and features, from

Christian, Eric

384

COLLOQUIUM: The NASA Planetary Science Program | Princeton Plasma...  

NLE Websites -- All DOE Office Websites (Extended Search)

February 25, 2015, 4:00pm to 6:30pm Colloquia MBG Auditorium COLLOQUIUM: The NASA Planetary Science Program Dr. James Green NASA Colloquium Committee: The Princeton Plasma Physics...

385

Unusual light in dark space revealed by Los Alamos, NASA  

NLE Websites -- All DOE Office Websites (Extended Search)

Unusual light in dark space revealed by Los Alamos, NASA Unusual light in dark space revealed by Los Alamos, NASA By looking at the dark spaces between visible galaxies and stars...

386

NASA's Genesis and Rapid Intensification Processes (GRIP) Field Experiment  

Science Journals Connector (OSTI)

In AugustSeptember 2010, NASA, NOAA, and the National Science Foundation (NSF) conducted separate but closely coordinated hurricane field campaigns, bringing to bear a combined seven aircraft with both new and mature observing technologies. NASA's ...

Scott A. Braun; Ramesh Kakar; Edward Zipser; Gerald Heymsfield; Cerese Albers; Shannon Brown; Stephen L. Durden; Stephen Guimond; Jeffery Halverson; Andrew Heymsfield; Syed Ismail; Bjorn Lambrigtsen; Timothy Miller; Simone Tanelli; Janel Thomas; Jon Zawislak

2013-03-01T23:59:59.000Z

387

Calibration of NASA Turbulent Air Motion Measurement System  

Science Journals Connector (OSTI)

A turbulent air motion measurement system (TAMMS) was integrated onboard the Lockheed 188 Electra airplane (designated NASA 429) based at the Wallops Flight Facility in support of the NASA role in global tropospheric research. The system provides air ...

Barrick John D. W.; Ritter John A.; Watson Catherine E.; Wynkoop Mark W.; Quinn John K.

1996-12-01T23:59:59.000Z

388

Radioisotope electric propulsion for robotic science missions to near-interstellar space  

SciTech Connect

The use of radioisotope electric propulsion for sending small robotic probes on fast science missions several hundred astronomical units (AU) from the Sun is investigated. Such missions would address a large variety of solar, interstellar, galactic and cosmological science themes from unique vantage points at 100 to 600 AU, including parallax distance measurements for the entire Milky Way Galaxy, sampling of the interstellar medium and imaging of cosmological objects at the gravitational lens foci of the Sun ({ge} 550 AU). Radioisotope electric propulsion (REP) systems are low-thrust, ion propulsion units based on multi-hundred watt, radioisotope electric generators and ion thrusters. In a previous work, the flight times for rendezvous missions to the outer planets (< 30 AU) using REP were found to be less than fifteen years. However fast prestellar missions to several hundred AU are not possible unless the probe`s energy can be substantially increased in the inner Solar System so as to boost the final hyperbolic excess velocity. In this paper an economical hybrid propulsion scheme combining chemical propulsion and gravity assist in the inner Solar System and radioisotope electric propulsion in the outer Solar System is studied which enables fast prestellar missions. Total hyperbolic excess velocities of 15 AU/year and flight times to 550 AU of about 40 years are possible using REP technology that may be available in the next decade.

Noble, R.J.

1994-10-01T23:59:59.000Z

389

Wave-like aquatic propulsion of mono-hull marine vessels  

Science Journals Connector (OSTI)

The present paper describes results of the experimental investigation of a small-scale mono-hull model boat propelled by a localised flexural wave propagating along the plate of finite width forming the boat's keel. Forward propulsion of the boat was achieved through flexural wave propagation in the opposite direction, which is similar to the aquatic propulsion used in nature by stingrays. The model boat under consideration underwent a series of tests both in a Perspex water tank and in an experimental pool. In particular, the forward velocity of the boat has been measured for different frequencies and amplitudes of the flexural wave. The highest velocity achieved was 32cm/s. The thrust and propulsive efficiency have been measured as well. The obtained value of the propulsive efficiency in the optimum regime was 51%. This indicates that the efficiency of this type of aquatic propulsion is comparable to that of dolphins and sharks (around 75%) and to that of a traditional propeller (around 70%). In contrast with a propeller though, the wave-like aquatic propulsion has the following advantages: it does not generate underwater noise and it is safe for people and marine animals.

V.V. Krylov; E. Porteous

2010-01-01T23:59:59.000Z

390

Synthetic jets at large Reynolds number and comparison to continuous jets  

SciTech Connect

Experimental measurements and flow visualization of synthetic jets and similar continuous jets are described. The dimensionless stroke length necessary to form a 2-D synthetic jet is between 5 and 10, with wider-nozzle jets consistently requiring a smaller value. Synthetic jets are wider, slower and have more momentum than similar continuous jets. Synthetic jets are generated using four nozzle widths that vary by a factor of four, and the driving frequency is varied over an order of magnitude. The resultant jets are in the range 13.5 < L{sub o}/h < 80.8 and 695 < Re{sub Uo} < 14700. In spite of the large range of stroke lengths, the near-field behavior of the synthetic jets scales with L{sub o}/h.

Smith, B. L. (Barton L.); Swift, G. W. (Gregory W.)

2001-01-01T23:59:59.000Z

391

Jet Dipolarity: Top Tagging with Color Flow  

SciTech Connect

A new jet observable, dipolarity, is introduced that can distinguish whether a pair of subjets arises from a color singlet source. This observable is incorporated into the HEPTopTagger and is shown to improve discrimination between top jets and QCD jets for moderate to high p{sub T}. The impressive resolution of the ATLAS and CMS detectors means that a typical QCD jet at the LHC deposits energy in {Omicron}(10-100) calorimeter cells. Such fine-grained calorimetry allows for jets to be studied in much greater detail than previously, with sophisticated versions of current techniques making it possible to measure more than just the bulk properties of jets (e.g. event jet multiplicities or jet masses). One goal of the LHC is to employ these techniques to extend the amount of information available from each jet, allowing for a broader probe of the properties of QCD. The past several years have seen significant progress in developing such jet substructure techniques. A number of general purpose tools have been developed, including: (i) top-tagging algorithms designed for use at both lower and higher p{sub T} as well as (ii) jet grooming techniques such as filtering, pruning, and trimming, which are designed to improve jet mass resolution. Jet substructure techniques have also been studied in the context of specific particle searches, where they have been shown to substantially extend the reach of traditional search techniques in a wide variety of scenarios, including for example boosted Higgses, neutral spin-one resonances, searches for supersymmetry, and many others. Despite these many successes, however, there is every reason to expect that there remains room for refinement of jet substructure techniques.

Hook, Anson; Jankowiak, Martin; /SLAC /Stanford U., Phys. Dept.; Wacker, Jay G.; /SLAC

2011-08-12T23:59:59.000Z

392

March 17, 2004 1 Open Source Release of NASA Software  

E-Print Network (OSTI)

Release of NASA Software ­ NPR 2210.1, External Release of NASA Software · Purpose of Policy ­ To protect NASA and American public's investment in software and to maintain and enhance U.S. industry's competitiveness in the U.S. & international marketplace #12;March 17, 2004 7 Software Release Policy · Policy

393

NASA/CR2004208938 Lunar Receiving Laboratory Project History  

E-Print Network (OSTI)

NASA/CR­2004­208938 Lunar Receiving Laboratory Project History Susan Mangus Muskingum College New Concord, Ohio William Larsen Johnson Space Center Houston, Texas June 2004 #12;THE NASA STI PROGRAM OFFICE . . . IN PROFILE Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Rathbun, Julie A.

394

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Volume 10 Issue 10 August 2014 #12;T he Small Business Administration gave NASA an "A" for awarding 22 percent of its federal contracts to small businesses in 2013--5 percent higher than targeted. On Aug. 1, NASA Administrator Charles Bolden joined Small

Christian, Eric

395

A Monthly Safety Bulletin The Office of the NASA  

E-Print Network (OSTI)

A Monthly Safety Bulletin from The Office of the NASA Aviation Safety Reporting System, P.O. Box 189, Moffett Field, CA 94035-0189 http://asrs.arc.nasa.gov/ ASRS Recently Issued Alerts On... Opening program. It therefore asked NASA to act as the independent third party that would administer the program

396

NASA/CR2003212153 A Stochastic Collocation Algorithm  

E-Print Network (OSTI)

NASA/CR­2003­212153 A Stochastic Collocation Algorithm for Uncertainty Analysis Lionel Mathelin and M. Yousuff Hussaini Florida State University, Tallahassee, Florida February 2003 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement

Mathelin, Lionel

397

NASA/TM2010216190 A General Algorithm for Reusing Krylov  

E-Print Network (OSTI)

NASA/TM­2010­216190 A General Algorithm for Reusing Krylov Subspace Information. I. Unsteady Navier, and Hester Bijl Delft University of Technology, Delft, The Netherlands January 2010 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Vuik, Kees

398

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov COMPOSITE STRUCTURES H v ­ 1970s A T I O N INTELLIGENT FLIGHT CONTROL SYSTEMS (IFCS) ­ 1970s-1990s WIND TUNNELS H v ­ 1930s-Today 16 NASA v ­ 1990s 10 #12;1. Computational Fluid Dynamics (CFD) Starting in the 1970s, NASA began developing

399

NASA Contractor Report 201588 ICASE Report No. 96-48  

E-Print Network (OSTI)

NASA Contractor Report 201588 ICASE Report No. 96-48 ICA VARIABLE DEGREE SCHWARZ METHODS Xiao-Chuan Cai Charbel Farhat Marcus Sarkis NASA Contract No. NASI-19480 July 1996 Institute for Computer Applications in Science and Engineering NASA Langley Research Center Hampton, VA 23681

Sarkis, Marcus

400

NASA/TM2012-217585 Air Traffic Management Technology  

E-Print Network (OSTI)

July 2012 NASA/TM­2012-217585 Air Traffic Management Technology Demonstration-1 Concept Scardina and Michael Greene Crown Consulting, Arlington, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Note: This page contains sample records for the topic "nasa jet propulsion" 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

October 2004 NASA/TM-2004-213279  

E-Print Network (OSTI)

October 2004 NASA/TM-2004-213279 Formalization of the Integral Calculus in the PVS Theorem Prover Ricky W. Butler Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Butler, Ricky W.

402

NASA/TM--2005213688 Revolutionary Concepts of Radiation  

E-Print Network (OSTI)

NASA/TM--2005�213688 Revolutionary Concepts of Radiation Shielding for Human Exploration of Space J, Alabama R.M. Winglee University of Washington, Seattle, Washington March 2005 #12;The NASA STI Program Office...in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics

Rathbun, Julie A.

403

NASA/TM2010216862 A Criteria Standard for Conflict  

E-Print Network (OSTI)

NASA/TM­2010­216862 A Criteria Standard for Conflict Resolution: A Vision for Guaranteeing, and George Hagen Langley Research Center, Hampton, Virginia October 2010 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Narkawicz, Anthony J.

404

NASA/TM2013218030 The Chorus Conflict and Loss of  

E-Print Network (OSTI)

NASA/TM­2013­218030 The Chorus Conflict and Loss of Separation Resolution Algorithms Ricky W. Butler, George Hagen, Jeffrey M. Maddalon Langley Research Center, Hampton, Virginia August 2013 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement

Maddalon, Jeffrey M.

405

November 2007 NASA/TM-2007-215089  

E-Print Network (OSTI)

November 2007 NASA/TM-2007-215089 Solving the AI Planning + Scheduling Problem Using Model Checking. Siminiceanu National Institute of Aerospace, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Muñoz, César A.

406

November 2013 NASA/TM2013-218055  

E-Print Network (OSTI)

November 2013 NASA/TM­2013-218055 A Turn-Projected State-Based Conflict Resolution Algorithm Ricky W. Butler and Timothy A. Lewis Langley Research Center, Hampton, Virginia #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Butler, Ricky W.

407

NASA/TP2004213015 Formal Verification of a Conflict  

E-Print Network (OSTI)

NASA/TP­2004­213015 Formal Verification of a Conflict Resolution and Recovery Algorithm Jeffrey~noz National Institute of Aerospace, Hampton, Virginia April 2004 #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Maddalon, Jeffrey M.

408

NASA Contractor Report 194949 ICASE Report No. 94-59  

E-Print Network (OSTI)

NASA Contractor Report 194949 ICASE Report No. 94-59 ?_7¢ S MULTIRESOLUTION REPRESENTATION AND NUMERICAL ALGORITHMS: A BRIEF REVIEW Ami Harten (NASA-CR-I94949) MULTIRESOLUTION REPRESENTATICN ANO - 18605 and NAS 1-19480 October 1994 Institute for Computer Applications in Science and Engineering NASA

Frey, Pascal

409

December 2001 NASA/TM-2001-211426  

E-Print Network (OSTI)

December 2001 NASA/TM-2001-211426 A Survey of Complex Object Technologies for Digital Libraries, and Maria Cristina Pattuelli University of North Carolina, Chapel Hill, North Carolina #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement

Nelson, Michael L.

410

February 2006 NASA/TM-2006-214279  

E-Print Network (OSTI)

February 2006 NASA/TM-2006-214279 Development of a Genetic Algorithm to Automate Clustering. Bilardo, Jr. Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Fisher, Michael

411

NASA FactsNational Aeronautics and Space Administration  

E-Print Network (OSTI)

NASA FactsNational Aeronautics and Space Administration Washington, D.C. 20546 (202) 358-1600 FACT into the solar system. NASA is working to make this transition ­ from the Space Shuttle Program to the Constellation Program ­ seamless and safe. NASA has a vast array of unique and critical resources that have

412

NASA/TM2010216857 Time of Closest Approach in  

E-Print Network (OSTI)

NASA/TM­2010­216857 Time of Closest Approach in Three-Dimensional Airspace C´esar A. Mu~noz and Anthony J. Narkawicz Langley Research Center, Hampton, Virginia October 2010 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Narkawicz, Anthony J.

413

NASA/TP2011217067 State-Based Implicit Coordination  

E-Print Network (OSTI)

NASA/TP­2011­217067 State-Based Implicit Coordination and Applications Anthony J. Narkawicz and C´esar A. Mu~noz Langley Research Center, Hampton, Virginia March 2011 #12;NASA STI Program . . . in Profile Since its founding, NASA has been dedicated to the advancement of aeronautics and space science

Narkawicz, Anthony J.

414

September 1999 NASA/TM-1999-209715  

E-Print Network (OSTI)

September 1999 NASA/TM-1999-209715 Compute as Fast as the Engineers Can Think! ULTRAFAST COMPUTING, D. H. Rudy, J. Sobieski, and O. O. Storaasli Langley Research Center, Hampton, Virginia #12;The NASA STI Program Office ... in Profile Since its founding, NASA has been dedicated to the advancement

Nelson, Michael L.

415

Oregon NASA Space Grant Consortium 92 Kerr Administration Building  

E-Print Network (OSTI)

Oregon NASA Space Grant Consortium 92 Kerr Administration Building Corvallis, OR 97331-2103 Phone upon availability of NASA funding Updated September 16, 2011 LMP OSGC Scholarship Programs Guide Guide Page 3 of 11 *Contingent upon availability of NASA funding Updated September 16, 2011 LMP OSGC

Tullos, Desiree

416

NASA Centennial Challenges were initiated in 2005 to directly engage  

E-Print Network (OSTI)

NASA Centennial Challenges were initiated in 2005 to directly engage the public in the process to problems of interest to NASA and the nation. The program seeks innovations from diverse and non Challenges NASA's Centennial Challenges Program drives innovation, creates opportunity and seeks to stimulate

Waliser, Duane E.

417

Multi-robot Simultaneous Localization and Mapping using Particle Filters  

E-Print Network (OSTI)

Multi-robot Simultaneous Localization and Mapping using Particle Filters Andrew Howard NASA Jet Propulsion Laboratory Pasadena, California 91109, U.S.A. Email: abhoward@robotics.jpl.nasa.gov Abstract-- This paper describes an on-line algorithm for multi- robot simultaneous localization and mapping (SLAM). We

Del Moral , Pierre

418

Diesel fueled ship propulsion fuel cell demonstration project  

SciTech Connect

The paper describes the work underway to adapt a former US Navy diesel electric drive ship as a 2.4 Megawatt fuel cell powered, US Coast Guard operated, demonstrator. The Project will design the new configuration, and then remove the four 600 kW diesel electric generators and auxiliaries. It will design, build and install fourteen or more nominal 180 kW diesel fueled molten carbonate internal reforming direct fuel cells (DFCs). The USCG cutter VINDICATOR has been chosen. The adaptation will be carried out at the USCG shipyard at Curtis Bay, MD. A multi-agency (state and federal) cooperative project is now underway. The USCG prime contractor, AEL, is performing the work under a Phase III Small Business Innovation Research (SBIR) award. This follows their successful completion of Phases I and II under contract to the US Naval Sea Systems (NAVSEA) from 1989 through 1993 which successfully demonstrated the feasibility of diesel fueled DFCs. The demonstrated marine propulsion of a USCG cutter will lead to commercial, naval ship and submarine applications as well as on-land applications such as diesel fueled locomotives.

Kumm, W.H. [Arctic Energies Ltd., Severna Park, MD (United States)

1996-12-31T23:59:59.000Z

419

Safety Aspects of the use of LNG for Marine Propulsion  

Science Journals Connector (OSTI)

Liquefied natural gas (LNG) as a fuel shows a large energy to volume ratio. In addition, its combustion is characterized by low levels of production of CO2, SOX, NOX and particulate matter in comparison to conventional fuels. To reduce the emission of SOX into the atmosphere the sulphur content of heavy fuel oils used for marine propulsion will be restricted in the near future. However, LNG is a combustible cryogenic liquid and as such presents specific safety hazards. The large scale use of LNG in the marine sector requires appropriate transport, storage and transfer facilities. The risks connected with the operation of these facilities are analyzed. Specific safety characteristics of the equipment involved are incorporated in the analysis. Safety distances are determined based upon a study of the effects of accidents during which LNG is released. It is found that the pressure at which LNG is released during an accident greatly influences the effect distances. At pressures near atmospheric, the hazards of LNG are comparable to those of conventional liquid fuels such as gasoline. At higher pressures, it behaves more like a combustible gas liquefied by compression.

L. Vandebroek; J. Berghmans

2012-01-01T23:59:59.000Z

420

A comprehensive study of electric propulsion system for vehicular application  

Science Journals Connector (OSTI)

Electrification of vehicular systems partial or complete has emerged as an attractive and sustainable alternative for futuristic transportation systems. This so-called electric vehicular technology (EVT) has engaged auto-manufacturers and researchers to primarily focus on fuel economy driving range performance and costs. These parameters are influenced by the design and performance of electric propulsion system (EPS) for vehicular application and its suitable integration with various electrical and mechanical apparatus. This paper primarily presents a comprehensive study of EPS. To present the study in synthesis a survey of important constituents of EPS is first carried out with techno-economic perspectives. Contemporary configurations of conventional and electrified vehicles are then discussed along with their respective advantages and limitations. EPS is considered to be the heart of EVT and therefore components of a standard EPS are discussed and comparative analyses are carried out in terms of present trends ongoing technological advancements and future challenges. In addition power flow control and management algorithms for EVT are also briefed.

Lalit Kumar

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Advanced Fusion Reactors for Space Propulsion and Power Systems  

SciTech Connect

In recent years the methodology proposed for conversion of light elements into energy via fusion has made steady progress. Scientific studies and engineering efforts in advanced fusion systems designs have introduced some new concepts with unique aspects including consideration of Aneutronic fuels. The plant parameters for harnessing aneutronic fusion appear more exigent than those required for the conventional fusion fuel cycle. However aneutronic fusion propulsion plants for Space deployment will ultimately offer the possibility of enhanced performance from nuclear gain as compared to existing ionic engines as well as providing a clean solution to Planetary Protection considerations and requirements. Proton triggered 11Boron fuel (p- 11B) will produce abundant ion kinetic energy for In-Space vectored thrust. Thus energetic alpha particles' exhaust momentum can be used directly to produce high Isp thrust and also offer possibility of power conversion into electricity. p-11B is an advanced fusion plant fuel with well understood reaction kinematics but will require some new conceptual thinking as to the most effective implementation.

Chapman, John J.

2011-06-15T23:59:59.000Z

422

Light weight space power reactors for nuclear electric propulsion  

SciTech Connect

A Nuclear Electric Propulsion (NEP) unit capable of propelling a manned vehicle to MARS will be required to have a value of {alpha} (kg/kWe) which is less than five. In order to meet this goal the reactor mass, and thus its contribution to the value of {alpha} will have to be minimized. In this paper a candidate for such a reactor is described. It consists of a gas cooled Particle Bed Reactor (PBR), with specially chosen materials which allow it to operate at an exit temperature of approximately 2000 K. One of the unique features of a PBR is the direct cooling of particulate fuel by the working fluid. This feature allows for high power densities, highest possible gas exit temperatures, for a given fuel temperature and because of the thin particle bed a low pressure drop. The PBR's described in this paper will have a ceramic moderator (Be{sub 2}C), ZrC coated fuel particles and a carbon/carbon hot frit. All the reactors will be designed with sufficient fissile loading to operate at full power for seven years. The burn up possible with particulate fuel is approximately 30%--50%. These rector designs achieve a value of {alpha} less than unity in the power range of interest (5 MWe). 5 refs., 3 figs.

Ludewig, H.; Mughabghab, S.; Lazareth, O.; Perkins, K.; Schmidt, E.; Powell, J.R.

1991-01-01T23:59:59.000Z

423

NASA Aeronautics Research Dr. Jaiwon Shin  

E-Print Network (OSTI)

.S. major commercial carriers burned 19.6B gallons of jet fuel, and DoD burned 4.6B gallons. At an average price of $3.00/gallon, fuel cost was $73B U.S. commercial carriers and DoD release more than 250 million to develop a fundamental understanding of the fluid mechanics governing the effectiveness of the concept

424

Presentation Title Page with no NASA imagery  

NLE Websites -- All DOE Office Websites (Extended Search)

Workshop Wrap Up Workshop Wrap Up * ORNL DAAC, MODIS Land Products Subsets Tools (MLPST) and Spatial Data Access Tool (SDAT) * SEDAC, Data Products and Terra Viva Data Viewer * GES DISC, GIOVANNI * LPDAAC, Products & Services * Affiliated Workshop: WK 13- How to Prepare Ecological Data Sets for Effective Analysis and Sharing http://eco.confex.com/eco/techprogram/S5744.HTM * Twelve EOSDIS Data Centers Jennifer Brennan, NASA EOSDIS Outreach Lead, Jennifer.L.Brennan@nasa.gov , Phone: 301-352-4628 National Aeronautics and Space Administration Tammy Walker Beaty 3 ORNL DAAC - MLPST and SDAT * ORNL DAAC for biogeochemical dynamics, http://daac.ornl.gov Mission: assemble, distribute, and provide data services for a comprehensive archive of terrestrial biogeochemistry and ecological dynamics observations and models to facilitate

425

NASA Net Zero Energy Buildings Roadmap  

SciTech Connect

In preparation for the time-phased net zero energy requirement for new federal buildings starting in 2020, set forth in Executive Order 13514, NASA requested that the National Renewable Energy Laboratory (NREL) to develop a roadmap for NASA's compliance. NASA detailed a Statement of Work that requested information on strategic, organizational, and tactical aspects of net zero energy buildings. In response, this document presents a high-level approach to net zero energy planning, design, construction, and operations, based on NREL's first-hand experience procuring net zero energy construction, and based on NREL and other industry research on net zero energy feasibility. The strategic approach to net zero energy starts with an interpretation of the executive order language relating to net zero energy. Specifically, this roadmap defines a net zero energy acquisition process as one that sets an aggressive energy use intensity goal for the building in project planning, meets the reduced demand goal through energy efficiency strategies and technologies, then adds renewable energy in a prioritized manner, using building-associated, emission- free sources first, to offset the annual energy use required at the building; the net zero energy process extends through the life of the building, requiring a balance of energy use and production in each calendar year.

Pless, S.; Scheib, J.; Torcellini, P.; Hendron, B.; Slovensky, M.

2014-10-01T23:59:59.000Z

426

Simple thermodynamics of jet engines  

Science Journals Connector (OSTI)

We use the first and second laws of thermodynamics to analyze the behavior of an ideal jet engine. Simple analytical expressions for the thermal efficiency the overall efficiency and the reduced thrust are derived. We show that the thermal efficiency depends only on the compression ratio r and on the velocity of the aircraft. The other two performance measures depend also on the ratio of the temperature at the turbine to the inlet temperature in the engine T 3 / T i . An analysis of these expressions shows that it is not possible to choose an optimal set of values of r and T 3 / T i that maximize both the overall efficiency and thrust. We study how irreversibilities in the compressor and the turbine decrease the overall efficiency of jet engines and show that this effect is more pronounced for smaller T 3 / T i .

Pedro Patrcio; Jos M. Tavares

2010-01-01T23:59:59.000Z

427

Numerical Simulations of Bouncing Jets  

E-Print Network (OSTI)

downhill gliding of the pool, at about 4mm/s of pool surface velocity. . . . . . . . . . . . . . . . . . . . . . 87 viii 5.7 Overall view of the shampoo jet bouncing of an inclined pool of the same liquid. The white arrow points at he breakup of the air....4 Time discretization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 3.5 Entropy residual stabilization . . . . . . . . . . . . . . . . . . . . . . 58 3.6 Adaptive mesh refinement . . . . . . . . . . . . . . . . . . . . . . . . 61 iv 3.7...

Lee, Sanghyun

2014-07-18T23:59:59.000Z

428

How A Vessel of This Magnitude Was Moved : A Comparative Analysis of Confederate Ironclad Steam Engines Boilers and Propulsion Systems.  

E-Print Network (OSTI)

??The development of steam propulsion machinery in warships during the 19th century in conjunction with iron armor and shell guns resulted in a technological revolution (more)

Bisbee, Saxon T.

2012-01-01T23:59:59.000Z

429

Combining Resummed Higgs Predictions Across Jet Bins  

E-Print Network (OSTI)

Experimental analyses often use jet binning to distinguish between different kinematic regimes and separate contributions from background processes. To accurately model theoretical uncertainties in these measurements, a consistent description of the jet bins is required. We present a complete framework for the combination of resummed results for production processes in different exclusive jet bins, focusing on Higgs production in gluon fusion as an example. We extend the resummation of the Higgs + 1-jet cross section into the challenging low transverse momentum region, lowering the uncertainties considerably. We provide combined predictions with resummation for cross sections in the Higgs + 0-jet and Higgs + 1-jet bins, and give an improved theory covariance matrix for use in experimental studies. We estimate that the relevant theoretical uncertainties on the signal strength in the Higgs to WW analysis are reduced by nearly a factor of 2 compared to the current value.

Radja Boughezal; Xiaohui Liu; Frank Petriello; Frank J. Tackmann; Jonathan R. Walsh

2013-12-16T23:59:59.000Z

430

National Aeronautics and Space AdministrationNational Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space AdministrationNational Aeronautics and Space Administration www.nasa 400-1489A 07/13 NASA EDUCATIONAL RESOURCES The NASA portal (www.nasa.gov) is the gateway. NASA's goal is to improve interactions for students, educators, and families with NASA and its

Waliser, Duane E.

431

Solar sail propulsion: enabling new capabilities for heliophysics  

E-Print Network (OSTI)

Solar sails can play a critical role in enabling solar and heliophysics missions. Solar sail technology within NASA is currently at 80% of TRL-6, suitable for an in-flight technology demonstration. It is conceivable that an initial demonstration could carry scientific payloads that, depending on the type of mission, are commensurate with the goals of the three study panels of the 2010 Heliophysics Survey. Follow-on solar sail missions, leveraging advances in solar sail technology to support Heliophysics Survey goals, would then be feasible. This white paper reports on a sampling of missions enabled by solar sails, the current state of the technology, and what funding is required to advance the current state of technology such that solar sails can enable these missions.

Johnson, L; Alhorn, D; Heaton, A; Vansant, T; Campbell, B; Pappa, R; Keats, W; Liewer, P C; Alexander, D; Ayon, J; Wawrzyniak, G; Burton, R; Carroll, D; Matloff, G; Kezerashvili, R Ya

2010-01-01T23:59:59.000Z

432

LDV Measurement of Confined Parallel Jet Mixing  

SciTech Connect

Laser Doppler Velocimetry (LDV) measurements were taken in a confinement, bounded by two parallel walls, into which issues a row of parallel jets. Two-component measurements were taken of two mean velocity components and three Reynolds stress components. As observed in isolated three dimensional wall bounded jets, the transverse diffusion of the jets is quite large. The data indicate that this rapid mixing process is due to strong secondary flows, transport of large inlet intensities and Reynolds stress anisotropy effects.

R.F. Kunz; S.W. D'Amico; P.F. Vassallo; M.A. Zaccaria

2001-01-31T23:59:59.000Z

433

Jet-calculus approach including coherence effects  

Science Journals Connector (OSTI)

We show how integrodifferential equations typical of jet calculus can be combined with an averaging procedure to obtain jet-calculus-based results including the Mueller interference graphs. Results in longitudinal-momentum fraction x for physical quantities are higher at intermediate x and lower at large x than with the conventional incoherent jet calculus. These results resemble those of Marchesini and Webber, who used a Monte Carlo approach based on the same dynamics.

L. M. Jones; R. Migneron; K. S. S. Narayanan

1987-01-01T23:59:59.000Z

434

81Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Deep Space One Remote AgentDeep Space One Remote Agent  

E-Print Network (OSTI)

81Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center of the NASA 1999 Software of the Year Award #12;82Dr. Gregory A. Dorais, NASA Ames Research Center Dr. David Kortenkamp, NASA Johnson Space Center Deep Space One (DS1)Deep Space One (DS1) l Launched 10/98 l Remote

Kortenkamp, David

435

Entropy Production in Relativistic Jet Boundary Layers  

E-Print Network (OSTI)

Hot relativistic jets, passing through a background medium with a pressure gradient p \\propto r^{-\\eta} where 2 gamma-ray bursts from ...

Kohler, Susanna

2014-01-01T23:59:59.000Z

436

Increasing jet entrainment, mixing and spreading  

DOE Patents (OSTI)

A free jet of air is disturbed at a frequency that substantially matches natural turbulences in the free jet to increase the entrainment, mixing, and spreading of air by the free jet, for example in a room or other enclosure. The disturbances are created by pulsing the flow of air that creates the free jet at the desired frequency. Such pulsing of the flow of air can be accomplished by sequentially occluding and opening a duct that confines and directs the flow of air, such as by rotating a disk on an axis transverse to the flow of air in the duct. 11 figs.

Farrington, R.B.

1994-08-16T23:59:59.000Z

437

Atmospheric Plasma Jet Machining of Optical Surfaces  

Science Journals Connector (OSTI)

Deterministic surface machining with high spatial resolution and nanometric depth accuracy is urgently required in the fabrication of high-end optics. Thus, plasma jet tools with...

Bhm, Georg; Eichentopf, Inga-Maria; Arnold, Thomas

438

Numerical investigation of a transient free jet resembling a laser-produced vapor jet  

E-Print Network (OSTI)

jet. They reported the penetration length and spreading rate of a non-harmonic unsteady jet that the en- trainment rate varied linearly with axial penetration, and the total mass entrainment had a cubic to investigate the transient jet [1­3]. Kouros et al. [4] measured the spreading rate of an unsteady turbulent

Budair, Mohammed Omar

439

Drying characteristics of slot jet reattachment nozzle and comparison with a slot jet nozzle  

E-Print Network (OSTI)

the same flow power and flow exerted surface peak pressure. The same flow power results showed that +45[] and +20[] SJR nozzles performed better than the slot jet nozzle, while the 0[] SJR had drying characteristics similar to the slot jet. The slot jet...

Alam, Syed Aftab

2012-06-07T23:59:59.000Z

440

Development of 1 MW-class HTS motor for podded ship propulsion system  

Science Journals Connector (OSTI)

To reduce fuel consumption and lead to a major reduction of pollution from NOx, SOx and CO2, the electric ship propulsion system is one of the most prospective substitutes for conventional ship propulsion systems. In order to spread it, innovative technologies for the improvement of the power transmission are required. The high temperature superconducting technology has the possibility for a drastic reduction of power transmission loss. Recently, electric podded propulsions have become popular for large cruise vessels, icebreakers and chemical tankers because of the flexibility of the equipment arrangement and the stern hull design, and better maneuverability in harbour, etc. In this paper, a 1 MW-class High temperature superconducting (HTS) motor with high efficiency, smaller size and simple structure, which is designed and manufactured for podded propulsion, is reported. For the case of a coastal ship driven by the optimized podded propulsion in which the 1MW HTS motor is equipped, the reductions of fluid dynamic resistance and power transmission losses are demonstrated. The present research & development has been supported by the New Energy and Industrial Technology Development Organization (NEDO).

K Umemoto; K Aizawa; M Yokoyama; K Yoshikawa; Y Kimura; M Izumi; K Ohashi; M Numano; K Okumura; M Yamaguchi; Y Gocho; E Kosuge

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "nasa jet propulsion" 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

Plasma jets and plasma bullets  

Science Journals Connector (OSTI)

Plasma plumes, or plasma jets, belong to a large family of gas discharges whereby the discharge plasma is extended beyond the plasma generation region into the surrounding ambience, either by a field (e.g. electromagnetic, convective gas flow, or shock wave) or a gradient of a directionless physical quantity (e.g. particle density, pressure, or temperature). This physical extension of a plasma plume gives rise to a strong interaction with its surrounding environment, and the interaction alters the properties of both the plasma and the environment, often in a nonlinear and dynamic fashion. The plasma is therefore not confined by defined physical walls, thus extending opportunities for material treatment applications as well as bringing in new challenges in science and technology associated with complex open-boundary problems. Some of the most common examples may be found in dense plasmas with very high dissipation of externally supplied energy (e.g. in electrical, optical or thermal forms) and often in or close to thermal equilibrium. For these dense plasmas, their characteristics are determined predominantly by strong physical forces of different fields, such as electrical, magnetic, thermal, shock wave, and their nonlinear interactions [1]. Common to these dense plasma plumes are significant macroscopic plasma movement and considerable decomposition of solid materials (e.g. vaporization). Their applications are numerous and include detection of elemental traces, synthesis of high-temperature materials and welding, laser--plasma interactions, and relativistic jets in particle accelerators and in space [2][4]. Scientific challenges in the understanding of plasma jets are exciting and multidisciplinary, involving interweaving transitions of all four states of matter, and their technological applications are wide-ranging and growing rapidly. Using the Web of Science database, a search for journal papers on non-fusion plasma jets reveals that a long initial phase up to 1990 with only 31 papers per year on average, and a total of some 1300 papers, precedes a considerable growth of some 3550% in research activity every five years, over the last 20 years or so. As shown in the table, the annual dissemination of the field is more than 1600 papers and the total number of papers is in excess of 20000. This upwards trajectory is typical of a strong and growing subject area in physical science, with considerable capacity in both fundamental science and applications. PeriodNumber of papersPapers per annum 19481990130031 199119952279456 199620003447689 200120054571914 2006201066401328 2011 1658 In many of the dense plasma jets discussed above, strong physical forces generated by the plasma are often desired and this favours plasma generation at elevated gas pressure, including atmospheric pressure, which favours a high level of gas ionization. Historically it has been challenging to reduce and control the strong physical forces in high-pressure plasmas for applications where these are unwanted, for example, surface modification of polymeric sheets [5]. Indeed, there is a real need for a vast range of material processing applications at temperatures below 100oC (or below 400 K) and this favours atmospheric-pressure plasma jets sustained far from thermal equilibrium with the dissipated electrical energy largely used not in heat generation but in unleashing non-equilibrium chemical reactions. The long-standing difficulty of effectively controlling the level of gas ionization at atmospheric pressure was overcome by the technological breakthrough of achieving atmospheric-pressure glow discharges in the late 1980s [6]. A related challenge stemming from high collisionality of atmospheric-pressure plasmas (v >> ?0) means that large-area plasmas sustained between parallel-plate electrodes are very susceptible to strong plasma instabilities when molecular gases are introduced for processing applications. This led to an effective technological solution in the early to late 1990s of confining atmospheric plasmas in a small v

M G Kong; B N Ganguly; R F Hicks

2012-01-01T23:59:59.000Z

442

FY2001 Annual Progress Report for the Vehicle Propulsion & Ancillary Subsystems Program  

NLE Websites -- All DOE Office Websites (Extended Search)

PROPULSION & PROPULSION & ANCILLARY SUBSYSTEMS 2 0 0 1 A N N UA L P R O G R E S S R E P O R T U.S. Department of Energy Energy Efficiency and Renewable Energy Office of Transportation Technologies A C K N O W L E D G E M E N T We would like to express our sincere appreciation to Argonne National Laboratory and Computer Systems Management, Inc., for their artistic and technical contributions in preparing and publishing this report. In addition, we would like to thank all our program participants for their contributions to the programs and all the authors who prepared the project abstracts that comprise this report. U.S. Department of Energy Office of Advanced Automotive Technologies 1000 Independence Avenue, S.W. Washington, D.C. 20585-0121 FY 2001 Annual Progress Report for the Vehicle Propulsion & Ancillary Subsystems Program

443

NASA Renews Multi-Million Dollar FundingNASA Renews Multi-Million Dollar Funding The National Aeronautics and Space Administration  

E-Print Network (OSTI)

1 NASA Renews Multi-Million Dollar FundingNASA Renews Multi-Million Dollar Funding The National Aeronautics and Space Administration (NASA) has renewed its support of the Antarctic Im- pulsive Transient

444

Space variations in axis height of the jet stream core  

E-Print Network (OSTI)

height of the jet axis relative to the height of the jet maximum for slow vs. fast cases. 13 Mean height of the jet axis relative to the height at the trough. 13 Mean height of the jet axis relative to the height at the ridge. 15 Mean height... of the jet axis relative to the height at the jet maximum, when the maximum is near a trough. 15 Mean height of the jet axis relative to the height at the minimum, when the minimum is near a ridge. 17 Mean height of the jet axis relative to the height...

Leutwyler, Cooke Hearon

1965-01-01T23:59:59.000Z

445

Simulation of jets at colliders  

Science Journals Connector (OSTI)

Abstract We review the development of the physics behind event generators during the last decade. After a more general description of parton showers, we focus mostly on the perturbative side of the simulations. Two newer developments of parton showers, as implemented in herwig++, are described in greater detail. Matching and merging of parton showers with fixed order computations are discussed. We describe some developments of multiple partonic interactions which are relevant for the simulation of jets from the underlying event, where the implementation in herwig++ is again taken as a generic example. Finally, we compare some event generator results to collider data from LEP and the LHC.

Stefan Gieseke

2013-01-01T23:59:59.000Z

446

Low Dose Radiation Research Program: DOE / NASA Joint Funded Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

DOE/NASA Joint Funded Projects DOE/NASA Joint Funded Projects NASA Source Photo Space explorers are subject to exposure to low dose ionizing radiation. Research that helps determine health risks from this exposure is funded by NASA and DOE. Source: NASA DOE's Low Dose Program and the National Aeronautics and Space Administration (NASA) jointly fund new research to develop a better scientific basis for understanding risks to humans from exposures to low doses or low fluences of ionizing radiation. Research must focus on elucidating molecular mechanisms and pathways involved in normal radiobiological responses to low dose exposure, and must have the potential to ultimately increase understanding of health outcomes from radiation exposures that are at or near current workplace exposure

447

NASAS RPS Design Reference Mission Set for Solar System Exploration  

Science Journals Connector (OSTI)

NASAs 2006 Solar System Exploration (SSE) Strategic Roadmap identified a set of proposed large Flagship medium New Frontiers and small Discovery class missions addressing key exploration objectives. These objectives respond to the recommendations by the National Research Council (NRC) reported in the SSE Decadal Survey. The SSE Roadmap is down?selected from an over?subscribed set of missions called the SSE Design Reference Mission (DRM) set Missions in the Flagship and New Frontiers classes can consider Radioisotope Power Systems (RPSs) while small Discovery class missions are not permitted to use them due to cost constraints. In line with the SSE DRM set and the SSE Roadmap missions the RPS DRM set represents a set of missions which can be enabled or enhanced by RPS technologies. At present NASA has proposed the development of two new types of RPSs. These are the Multi?Mission Radioisotope Thermoelectric Generator (MMRTG) with static power conversion; and the Stirling Radioisotope Generator (SRG) with dynamic conversion. Advanced RPSs under consideration for possible development aim to increase specific power levels. In effect this would either increase electric power generation for the same amount of fuel or reduce fuel requirements for the same power output compared to the proposed MMRTG or SRG. Operating environments could also influence the design such that an RPS on the proposed Titan Explorer would use smaller fins to minimize heat rejection in the extreme cold environment; while the Venus Mobile Explorer long?lived in?situ mission would require the development of a new RPS in order to tolerate the extreme hot environment and to simultaneously provide active cooling to the payload and other electric components. This paper discusses NASAs SSE RPS DRM set in line with the SSE DRM set. It gives a qualitative assessment regarding the impact of various RPS technology and configuration options on potential mission architectures which could support NASAs RPS technology development planning and provide an understanding of fuel need trades over the next three decades.

Tibor S. Balint

2007-01-01T23:59:59.000Z

448

Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative to propellers in small  

E-Print Network (OSTI)

1 Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative. Finally there is a description of the control system implementation for the tail's motion. Index terms--Fish propulsion, underwater robot, fish design. I. INTRODUCTION LTHOUGH almost all marine vehicles use propellers

Papadopoulos, Evangelos

449

PUBLISHED ONLINE: 20 JUNE 2010 | DOI: 10.1038/NPHYS1686 Propulsion generated by diffusion-driven flow  

E-Print Network (OSTI)

LETTERS PUBLISHED ONLINE: 20 JUNE 2010 | DOI: 10.1038/NPHYS1686 Propulsion generated by diffusion plates4 . Here we show that buoyancy-driven flows can also generate propulsion. Specifically, we find for transport processes in regions of varying fluid density, such as marine snow aggregation at ocean

Loss, Daniel

450

Fission Thrust sail as booster for high {\\Delta}v fusion based propulsion  

E-Print Network (OSTI)

The fission thrust sail as booster for nuclear fusion-based rocket propulsion for future starships is studied. Some required aspects of these systems such as neutron moderation and sail regeneration are discussed. First order calculations are used together with Monte Carlo simulations to assess system performance. When the fusion rocket has relatively low efficiency (~30%) in converting fusion fuel to a directed exhaust, adding a fission sail is shown to be beneficial for obtainable delta-v. Also, this type of fission-fusion hybrid interstellar propulsion has the potential to improve acceleration. Other advantages are discussed as well.

Ceyssens, Frederik; Driesen, Maarten

2014-01-01T23:59:59.000Z

451

Fuel-optimal Earth-Mars trajectories using low-thrust exhaust-modulated plasma propulsion  

E-Print Network (OSTI)

relerence frames Lx', y', r'I are different for the Earth and Mars references. The substitutions for the second-order derivatives required in the 27 differential equations are given by 2 VIM ISI CCS M + RM RM RM (2. 64) V V sin AM + RM cosltlM ( RM.... Characteristics of the Plasma Propulsion. . Equations of Motion. III NECESSARY CONDITIONS OF OPTIMALITY?. . . 14 15 16 30 Optimal Control Theory. Necessary Conditions of a Fuel-Optimal Earth-Mars Trajectory with Low-Thrust Plasma Propulsion...

Nah, Ren Sang

2012-06-07T23:59:59.000Z

452

Problems in developing bimodal space power and propulsion system fuel element  

SciTech Connect

The paper discusses design of a space nuclear power and propulsion system fuel element (PPFE) developed on the basis of an enhanced single-cell thermionic fuel element (TFE) of the 'TOPAZ-2' thermionic converter-reactor (TCR), and presents the PPFE performance for propulsion and power modes of operation. The choice of UC-TaC fuel composition is substantiated. Data on hydrogen effect on the PPFE output voltage are presented, design solutions are considered that allow to restrict hydrogen supply to an interelectrode gap (IEG). Long-term geometric stability of an emitter assembly is supported by calculated data.

Nikolaev, Yu. V.; Gontar, A. S.; Zaznoba, V. A.; Parshin, N. Ya.; Ponomarev-Stepnoi, N. N.; Usov, V. A. [Research Institute of SIA 'Lutch' Podolsk, Moscow Region, 142100 (Russian Federation); RRC 'Kurchatov Institute' Moscow, 123182 (Russian Federation)

1997-01-10T23:59:59.000Z

453

Miniconference on astrophysical jets P. M. Bellan  

E-Print Network (OSTI)

and numerical modelers of both astrophysical jets and spheromaks, and laboratory experimentalists. The purpose-organization. Spheromaks have been studied for the last two decades and most recently, it has been realized that the physics of spheromak formation has much in common with magnetohydrodynamically driven astrophysical jets

Bellan, Paul M.

454

Investigating Jet Mixing Using Electrical Resistance Tomography  

Science Journals Connector (OSTI)

Coaxial jet and side entry mixers are used in a wide range of industries for a variety of processes including precipitation polymerization and neutralization duties. Jet mixers are characterized by short contact times between the fluids and can be operated continuously or semi?batch. Coaxial and side entry jets can be designed in order to deliver rapid turbulent mixing using short sections of pipeline. As the energy required for mixing is provided by the addition stream the process?side pressure drop required for homogeneity is very low. A key design parameter for jet mixers is the mixing length the length of pipe downstream of the injection point required to achieve a given degree of homogeneity. The mixing length can be affected by the addition geometry (for example coaxial or side entry) orifice size and shape operating conditions and material properties. This paper presents the use of Electrical Resistance Tomography (ERT) to monitor jet mixing via the addition of a conductivity tracer through coaxial and side entry jets. Multiple ERT sensors are fitted along the pipe downstream of the jet addition point. The ERT sensors enable real time non?invasive measurement of conductivity within the pipe furnishing approximately 2500 conductivity measurements per ERT sensor when modeled independently in 3D. The effect of secondary (main pipe) flow rate and jet configuration on the nature of the tracer plume evolution and axial mixing is determined using this technique.

D. R. Stephenson; M. Cooke; A. Kowalski; T. A. York

2007-01-01T23:59:59.000Z

455

Jet multiplicities as the QGP thermometer  

E-Print Network (OSTI)

It is proposed to use the energy behavior of mean multiplicities of jets propagating in a nuclear medium as the thermometer of this medium during the collision phases. The qualitative effects are demonstrated in the framework of the fixed coupling QCD with account of jet quenching.

I. M. Dremin; O. S. Shadrin

2006-02-10T23:59:59.000Z

456

NASA 172591 ICASE: m R T NO. 85-21  

E-Print Network (OSTI)

NASA 172591 ICASE: m R T NO. 85-21 ICASE Randall J. LeVeque ( 5 sA-CR-1'7259 1) INT EbdE LIB3 EOUN CARY C011DITlOHS FOE LOC, A C X ANI: AFkPOXI:!!AITE PACTOBEZATICN HETfCCS ;NASA) i6 p tlc a02/ar A O I APPLICATIONS IN SCIENCE AND ENCI#EERINC NASA Langley Rerearch Center, Haapton, Virginfa 23665 Operated

LeVeque, Randy

457

Pre-Project planning of Capital Facilities at NASA ; .  

E-Print Network (OSTI)

??This thesis details the development of a NASA specific Project Definition Rating Index (PDRI) tool. This tool is to be used as a checklist for (more)

Barrow, Benjamin John.

1999-01-01T23:59:59.000Z

458

Sandia National Laboratories: NASA Ames Research Center in northern...  

NLE Websites -- All DOE Office Websites (Extended Search)

NASA Ames Research Center in northern California Sierra Unmanned Aerial Vehicle to Begin Flights Over Arctic Sea Ice On July 25, 2013, in Climate, Customers & Partners, Global,...

459

The NASA Shuttle Program Local and Natinal Newspaper Content Analysis.  

E-Print Network (OSTI)

??Little research had been done on the communication of NASA media coverage, especially coverage of the shuttle program. This analysis adds to the mass communication (more)

Shkolyar, Svetla

2009-01-01T23:59:59.000Z

460

NASA's Composite Portfolio: Department of Energy Workshop Fiber...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Aeronautics and Space Administration NASA 's Composites Portfolio Department of Energy Workshop Fiber Reinforced Polymer Composites Manufacturing Presented by: John Vickers January...

Note: This page contains sample records for the topic "nasa jet propulsion" 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

U.S. National Aeronautics and Space Administration (NASA), Surface...  

Open Energy Info (EERE)

global horizontal irradiance GIS data at on... (Abstract): Global Horizontal Irradiance NASA Surface meteorology and Solar Energy (SSE) Release 6.0 Data Set (Jan 2008) 22-year...

462

NASA Scientist Discusses Nanotube Advances Feb. 9 at Jefferson...  

NLE Websites -- All DOE Office Websites (Extended Search)

Nanotube Advances Feb. 9 at Jefferson Lab NEWPORT NEWS, Va., Feb. 2, 2011 - Mike Smith, a NASA Langley Research Center scientist, will present a lecture titled "20th...

463

Anti-Spin Control for Marine Propulsion Systems yvind N. Smogeli1, Jostein Hansen2, Asgeir J. Srensen1 and Tor Arne Johansen2  

E-Print Network (OSTI)

Anti-Spin Control for Marine Propulsion Systems ?yvind N. Smogeli1, Jostein Hansen2, Asgeir J. Sørensen1 and Tor Arne Johansen2 Abstract-- An anti-spin controller for marine propulsion systems in rough the transients in the power system and reduce the mechanical wear and tear of the propulsion system components

Johansen, Tor Arne

464

Production of jet fuels from coal-derived liquids. Volume 4. GPGP jet-fuels production program-feed analyses compilation and review. Interim report, October 1987-January 1988  

SciTech Connect

In September 1986, the Fuels Branch of the Aero Propulsion Laboratory at Wright-Patterson Air Force Base, Ohio, began an investigation of the potential of jet-fuel production from the liquid by-product streams produced by the gasification of lignite at the Great Plains Gasification Plant (GPGP) in Beulah, North Dakota. Funding was provided to the Department of Energy (DOE) Pittsburgh Energy Technology Center (PETC) to administer the experimental portion of this effort. This document reports the results of the effort by Burns and Roe Services Corporation/Science Applications International Corporation (BRSC/SAIC) to compile and review physical and chemical characterization data for the GPGP by-product liquids. This report describes the relative reliability of the various characterization data and indicates where specific limitations exist.

Rossi, R.J.

1988-07-01T23:59:59.000Z

465

NASA Technical Memorandum 107050 An Accelerated Development,Reduced Cost  

E-Print Network (OSTI)

in a "building block" fashion, a variety of single and multi-engine lunar and Mars vehicles can be configured, a single launch Mars cargo vehicle capable of -------______-_-_------ *Nuclear Propulsion Office "'Cost klbf NTR engines and the two standardized LH2 tank sizes developed for lunar and Mars cargo vehicle

Rathbun, Julie A.

466

Presentation Title Page with no NASA imagery  

NLE Websites -- All DOE Office Websites (Extended Search)

SPATIAL DATA ACCESS TOOL SPATIAL DATA ACCESS TOOL Open Geospatial Consortium (OGC) Services Bruce E. Wilson Suresh K. Santhana Vannan Yaxing Wei Tammy W. Beaty National Aeronautics and Space Administration www.nasa.gov National Aeronautics and Space Administration 2 Outline: * Introduction to SDAT * Introduction to OGC * OGC services at ORNL DAAC * Demo * OGC Service registration in metadata catalogues * Demo * Next steps ESA, August 2010 OGC Spatial Data Access Tool National Aeronautics and Space Administration 3 Introduction to SDAT SDAT - Spatial Data Access Tool ORNL DAAC has been charged with making spatial data readily available to users Spatial Data: remote sensing, map layers, and model output SDAT Features: * ORNL DAAC Web client to visualize and Download Geospatial data * Based on Open Geospatial Consortium (OGC) standards

467

A Flux-Limited Numerical Method for the MHD Equations to Simulate Propulsive Plasma Flows  

E-Print Network (OSTI)

to be effective tools in plasma propulsion research, a higher order accu- rate solver that captures MHD shocks approach, numerical simulations are valuable tools in plasma thruster research. More- over, simulations can Simula- tions The importance of numerical simulation in advancing plasma thruster research was realized

Choueiri, Edgar

468

The CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized and  

E-Print Network (OSTI)

· Overall control authority: roll, pitch, yaw, +/- Z · On-orbit update of system parameters, including · System two-failure-tolerant against leakage · Life span: 2+ years from propellant load. · HighThe CU Aerospace / VACCO CubeSat High Impulse Propulsion System (CHIPS) offers a miniaturized

Carroll, David L.

469

Introduction: Perspectives on Detonation-Based Propulsion DOI: 10.2514/1.26953  

E-Print Network (OSTI)

Introduction: Perspectives on Detonation-Based Propulsion DOI: 10.2514/1.26953 DETONATION, a shock, is one of the most rapid chemical energy release processes in nature. For self-sustained detonations. These rapid speeds are attained because the major mechanism of energy transport in a detonation is acoustic

470

Dynamic analysis and design of air spring mounting system for marine propulsion system  

Science Journals Connector (OSTI)

Abstract Marine propulsion unit (MPU) is one of the dominant vibration and noise sources onboard ship. Its vibration can be attenuated effectively by isolating MPU with low-frequency mounting system. But this is difficult to implement due to the stringent requirement of MPU alignment with the propulsion shafting. In this paper a novel air spring mounting system (ASMS) for propulsion system is proposed consisting of air spring subsystem, alignment control subsystem and safety protection subsystem. The load distribution optimization method and dynamic model of ASMS are presented. The factors that affect system stability and natural frequencies are analyzed, as well as the design measures to enhance system performance. A theoretical model is presented to estimate the isolation effect of ASMS. The monitoring model of alignment between MPU and propulsion shafting is established, followed by the alignment control algorithm and converge rule which assures the fast and uniform convergence of both air springs? load distribution and alignment control process. Safety protection mechanism is designed to ensure that the MPU can operate safely in case of ASMS failure or other extreme circumstances. A scaled ASMS prototype is manufactured and tested on a special experimental setup. Experimental results validate the effectiveness of theoretical models and show that the performance of ASMS satisfies the operation requirements of MPU.

Lin He; Wei Xu; Wenjun Bu; Liang Shi

2014-01-01T23:59:59.000Z

471

Propulsion efficiencies of magnetohydrodynamic propulsors considering electrical and magnetic end effects. Research and development report  

SciTech Connect

A mathematical theory for the performance of a direct current, rectangular duct magnetohydrodynamic (MBD) propulsion system propelling a marine vehicle is presented. The model accounts for the effects of spatially nonuniform magnetic fields and current distributions which are present at the ends of the propulsion unit. The theory is based on an approximate solution of the general NM duct flow problem in which the mutual interaction of the electric current and fluid flow in a strong magnetic field are considered in detail. For a specified vehicular steady state cruising speed, the propulsive efficiency and electrical power requirements can be calculated from the theory given the hydrodynamic drag of the vehicle and the properties of the fluid medium. Explicit electrical end loss factors are calculated to relate the performance of a propulsor with nonuniform field distributions to the performance of an idealized propulsor with no end losses operating under the same conditions. The power losses due to auxiliary equipment such as electrical generators, buswork, and magnetic cryogenic systems are not included in the study. Numerical results from the models for five design configurations for a nominal geometry under a reasonable range of operating parameters are presented. The numerical results, including the ideal propulsor with no end effects, indicate that the fringing magnetic and current distributions at the ends of the duct generally significantly degrade the propulsive efficiency. The degree of degradation depends on details of the design configuration of the rectangular duct.

Beatty, P.A.; Hughes, W.F.; Brown, S.H.; Walters, J.D.; Sondergaard, N.A.

1992-04-01T23:59:59.000Z

472

Design methodology based on H? control theory for marine propulsion system with bumpless transfer function  

Science Journals Connector (OSTI)

In this paper we propose a control system design methodology which has two main objectives: the first one is to achieve control system specifications for a local H? controller designed for a given operation condition, and the second ... Keywords: H controller, bumpless transfer, ship propulsion system

M. J. Lopez; L. Garcia; J. Lorenzo; A. Consegliere

2010-03-01T23:59:59.000Z

473

An Integrated Marine Propulsion System Utilising TRIGA{sup TM} Fuel  

SciTech Connect

This paper describes the reactor physics, shielding, thermal hydraulics, reactor dynamics and safety studies conducted to develop a proposed Integrated Marine Propulsion System (IMPS) utilising TRIGA{sup TM} type uranium zirconium hydride fuel. The study has demonstrated that the IMPS plant is feasible and meets the design safety principles and safety criteria imposed on the study. (authors)

Manach, G.; Monnez, J-P. [Ecole des Applications Militaires de l'Energie Atomique, Cherbourg (France); Freeman, M.J.; Newell, A.; Brushwood, J.M.; Thompson, A.; Collins, C.; Scholes, N.; Hamilton, P.J.; Beeley, P.A. [Nuclear Department/ Flagship Training Ltd, HMS Sultan, Military Road, Gosport, PO12 3BY (United Kingdom)

2004-07-01T23:59:59.000Z

474

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study  

E-Print Network (OSTI)

Electric Motor Drive Selection Issues for HEV Propulsion Systems: A Comparative Study M. Zeraoulia1 Combustion Engine (ICE) and the electric motor to deliver power in parallel to drive the wheels. Since both the ICE and electric motor are generally coupled to the drive shaft of the wheels via two clutches

Paris-Sud XI, Université de

475

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway Vehicles  

E-Print Network (OSTI)

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway) and the linear switched reluctance motor (LSRM). Switched reluctance motors generally offer a very simple issue with the switched reluctance motors is the highly nonlinear magnetisation characteristic

Paderborn, Universität

476

Dedicated Laboratory Setup for CO{sub 2} TEA Laser Propulsion Experiments at Rensselaer Polytechnic Institute  

SciTech Connect

Laser propulsion research progress has traditionally been hindered by the scarcity of photon sources with desirable characteristics, as well as integrated specialized flow facilities in a dedicated laboratory environment. For TEA CO{sub 2} lasers, the minimal requirements are time-average powers of >100 W), and pulse energies of >10 J pulses with short duration (e.g., 0.1 to 1 {mu}s); furthermore, for the advanced pulsejet engines of interest here, the laser system must simulate pulse repetition frequencies of 1-10 kilohertz or more, at least for two (carefully sequenced) pulses. A well-equipped laser propulsion laboratory should have an arsenal of sensor and diagnostics tools (such as load cells, thrust stands, moment balances, pressure and heat transfer gages), Tesla-level electromagnet and permanent magnets, flow simulation facilities, and high-speed visualization systems, in addition to other related equipment, such as optics and gas supply systems. In this paper we introduce a cutting-edge Laser Propulsion Laboratory created at Rensselaer Polytechnic Institute, one of the very few in the world to be uniquely set up for beamed energy propulsion (BEP) experiments. The present BEP research program is described, along with the envisioned research strategy that will exploit current and expanded facilities in the near future.

Salvador, Israel I.; Kenoyer, David; Myrabo, Leik N.; Notaro, Samuel [Department of Mechanical, Aerospace, and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180 (United States)

2010-10-08T23:59:59.000Z

477

JOURNAL OF PROPULSION AND POWER Vol. 20, No. 6, NovemberDecember 2004  

E-Print Network (OSTI)

of Hall thrusters.1 High-energy exhaust par- ticles interact with the neutral background particles through to the panel. This paper reports on a neutral background pressure map of a vacuum chamber that is used to val and Electric Propulsion Laboratory, Department of Aerospace Engineering, 1052 FXB Building, 1320 Beal Avenue

Walker, Mitchell

478

JOURNAL OF PROPULSION AND POWER Vol. 9, No. 4, July-Aug. 1993  

E-Print Network (OSTI)

the rotor blades which is a function of the rotor circumferential position. This, in turn, results study show that the magnitude of this effect is a strong function of rotor-stator blade row spacingJOURNAL OF PROPULSION AND POWER Vol. 9, No. 4, July-Aug. 1993 Blade Row Interaction Effects

Giles, Mike

479

JOURNAL OF PROPULSION AND POWER Vol. 19, No. 2, MarchApril 2003  

E-Print Network (OSTI)

-temperaturema- terials for the turbine blades.For given size of the gas generator,the power that can be deliveredJOURNAL OF PROPULSION AND POWER Vol. 19, No. 2, March­April 2003 Conceptual Development of Quiet.The strategy is to takearepresentativestate-of-the-artmilitaryturbofanengineandincrease its bypass ratio

Papamoschou, Dimitri

480

2006-01-0443 Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion  

E-Print Network (OSTI)

at the vehicle level. INTRODUCTION Diesel engines are particularly suited for medium-duty vehicles due in controlling engine operation and generally reduce the total mass of exhaust. However, it may not be possible2006-01-0443 Engine-in-the-Loop Testing for Evaluating Hybrid Propulsion Concepts and Transient

Peng, Huei

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


481

Divergence of a Propulsive Plasma Flow Expanding through a Magnetic Nozzle  

E-Print Network (OSTI)

Divergence of a Propulsive Plasma Flow Expanding through a Magnetic Nozzle IEPC-2009-260 Presented, September 20-24, 2009 Justin M. Little and Edgar Y. Choueiri Princeton University, Princeton, NJ, 08544, USA An analytical expression for the divergence angle of an energetic plasma exhaust plume emerging from

Choueiri, Edgar

482

Optimization of direct drive induction motors for electric ship propulsion with high speed propellers  

Science Journals Connector (OSTI)

Direct drive electric ship propulsion can offer increased flexibility and reduced overall fuel consumption compared to geared mechanical systems [Davis 1987, Doerry 2007]. As a well-established technology, induction motors are a dependable and economical ... Keywords: AC motors, induction motor drives, induction motors, thermal analysis

S. C. Englebretson; J. L. Kirtley, Jr; C. Chryssostomidis

2009-07-01T23:59:59.000Z

483

Modeling and simulation of electric propulsion concepts for a multimodal prototype demonstrator  

Science Journals Connector (OSTI)

The Office of Naval Research (ONR) is planning a prototype demonstration of a novel craft envisioned to have three modes of operation: Fuel-efficient, good sea keeping mode for open ocean transits High-speed, shallow water mode Amphibious ... Keywords: integrated power systems, microgrids, multimodal propulsion, naval electric power systems

J. Herbst; A. Gattozzi; J. Uglum; J. S. Chalfant; C. Chryssostomidis; J. Langston; M. Steurer; M. Andrus

2009-07-01T23:59:59.000Z

484

Composite Octet Searches with Jet Substructure  

SciTech Connect

Many new physics models with strongly interacting sectors predict a mass hierarchy between the lightest vector meson and the lightest pseudoscalar mesons. We examine the power of jet substructure tools to extend the 7 TeV LHC sensitivity to these new states for the case of QCD octet mesons, considering both two gluon and two b-jet decay modes for the pseudoscalar mesons. We develop both a simple dijet search using only the jet mass and a more sophisticated jet substructure analysis, both of which can discover the composite octets in a dijet-like signature. The reach depends on the mass hierarchy between the vector and pseudoscalar mesons. We find that for the pseudoscalar-to-vector meson mass ratio below approximately 0.2 the simple jet mass analysis provides the best discovery limit; for a ratio between 0.2 and the QCD-like value of 0.3, the sophisticated jet substructure analysis has the best discovery potential; for a ratio above approximately 0.3, the standard four-jet analysis is more suitable.

Bai, Yang; /SLAC; Shelton, Jessie; /Yale U.

2012-02-14T23:59:59.000Z

485

Dark jets in solar coronal holes  

E-Print Network (OSTI)

A new solar feature termed a dark jet is identified from observations of an extended solar coronal hole that was continuously monitored for over 44 hours by the EUV Imaging Spectrometer on board the Hinode spacecraft in 2011 February 8-10. Line-of-sight velocity maps derived from the coronal Fe XII $\\lambda$195.12 emission line, formed at 1.5 MK, revealed a number of large-scale, jet-like structures that showed significant blueshifts. The structures had either weak or no intensity signal in 193 A filter images from the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory, suggesting that the jets are essentially invisible to imaging instruments. The dark jets are rooted in bright points and occur both within the coronal hole and at the quiet Sun-coronal hole boundary. They exhibit a wide range of shapes, from narrow columns to fan-shaped structures, and sometimes multiple jets are seen close together. A detailed study of one dark jet showed line-of-sight speeds increasing along the jet axis fr...

Young, Peter R

2015-01-01T23:59:59.000Z

486

Jet Reconstruction in Heavy Ion Collisions  

E-Print Network (OSTI)

Measurements of strong suppression of inclusive hadron distributions and di-hadron correlations at high $p_{T}$, while providing evidence for partonic energy loss, also suffer from geometric biases due to the competition of energy loss and fragmentation. The measurements of fully reconstructed jets is expected to lack these biases as the energy flow is measured independently of the fragmentation details. In this article, we review the recent results from the heavy ion collisions collected by the STAR experiment at RHIC on direct jet reconstruction utilizing the modern sequential recombination and cone jet reconstruction algorithms together with their background subtraction techniques. In order to assess the jet reconstruction biases a comparison with the jet cross section measurement in $\\sqrt{s}=200$ GeV p+p collisions scaled by the number of binary nucleon-nucleon collisions to account for nuclear geometric effects is performed. Comparison of the inclusive jet cross section obtained in central Au+Au events with that in $p+p$ collisions, published previously by STAR, suggests that unbiased jet reconstruction in the complex heavy ion environment indeed may be possible.

Sevil Salur

2009-05-12T23:59:59.000Z

487

Jet production in ep collisions Pierre Van Mechelen  

E-Print Network (OSTI)

Jet production in ep collisions Pierre Van Mechelen University of Antwerpen Pierre electroproduction #12; Jet production in ep collisions Pierre Van Mechelen HERA, H1 and ZEUS H1 ZEUS p (920 GeV) e ± (27.6 GeV) #12; Jet production in ep collisions Pierre Van Mechelen Jet finding algorithms Clustering

488

Privacy Impact Assessment Full Entry Name: Social Networking Use at NASA  

E-Print Network (OSTI)

Privacy Impact Assessment Full Entry Name: Social Networking Use at NASA NASA Center: NASA Headquarters Office/Mission Program/Project Supported: Public Affairs Office NASA Point of Contact: ROBERT JACOBS Phone Number: 202.358.1760 E-mail: bob.jacobs@nasa.gov #12;System Overview: National Aeronautics

Christian, Eric

489

NASA's Implementation Plan for Space Shuttle Return to Flight and Beyond June 3, 2005  

E-Print Network (OSTI)

#12;#12;NASA's Implementation Plan for Space Shuttle Return to Flight and Beyond June 3, 2005 NASA plan is available at www.nasa.gov #12;#12;NASA's Implementation Plan for Space Shuttle Return to Flight and Beyond June 3, 2005 Tenth Edition Summary June 3, 2005 This edition of NASA's Implementation Plan

490

Gas Turbine Engine Collaborative Research - NASA Glenn Research Center  

NLE Websites -- All DOE Office Websites (Extended Search)

Gas Turbine Engine Collaborative Gas Turbine Engine Collaborative Research-NASA Glenn Research Center Background Advancing the efficiency and performance levels of gas turbine technology requires high levels of fundamental understanding of the actual turbine component level technology systems. The National Aeronautics and Space Administration Glenn Research Center (NASA Glenn), with support from the Ohio State University, is planning research to compile

491

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

Leadership in Environmental, Energy, and Economic Performance Fleet Petroleum Use GOAL: Reduce by 2% annuallyAgencyClimateAdaptationPlanbyJuly2012 · ProvideFleetManagementPlanbyJuly2012 GOALS STATUS #12;WE ARE... NASA is meeting or exceeding most of its SSPP goals and objectives. Since our prior annual report, NASA's sustainability efforts

Waliser, Duane E.

492

NASA maps volcano's 4000-mile-long SO2 cloud  

Science Journals Connector (OSTI)

NASA maps volcano's 4000-mile-long SO2 cloud ... The S02 was mapped on June 18 by the Total Ozone Mapping Spectrometer, an instrument aboard NASA's NIMBUS-7 satellite that has been measuring ozone levels and monitoring S02 since 1978. ...

1991-07-01T23:59:59.000Z

493

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov STEREO SCIENCE WRITER®S GUIDE A guide for reporters to understand the mission and purpose of NASA®s STEREO observatories #12;NASASCIENCE MISSION DIRECTORATE QUICK REFERENCE GUIDE HOW NASA IS STRUCTURED TO SEEK SOLAR ANSWERS Q&A ON THE STEREO MISSION

Christian, Eric

494

NASA's Return On Investment Report Issue 11 February 2013  

E-Print Network (OSTI)

and controls for the Dream Chaser spacecraft, Atlas V launch vehicle, and ground and mission systems. Meanwhile. facility. When completed, the vehicle will be shipped to NASA's Dryden Flight Research Center at Edwards their next test vehicle structure at NASA's Michoud Assembly Facility in New Orleans. In December, Space

495

National Aeronautics and Space Administration NASA Presentation to the  

E-Print Network (OSTI)

of Sciences and National Council on Radiation Protection and Measurements and are selected using a rigorous is NASA interested in these types of radiation effects for deep space mission? What is NASA's projected strategy and plan for deep space travel? What specifically are the potential concerns for astronaut safety

Homes, Christopher C.

496

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov LANCE Land Atmosphere Near, MODIS, and OMI instruments onboard NASA's Earth Observing System (EOS) satellites- Terra, Aqua and Aura programs and global food security risks are monitored using MODIS NRT data from LANCE. There are several

497

National Aeronautics and Space Administration www.nasa.gov  

E-Print Network (OSTI)

National Aeronautics and Space Administration www.nasa.gov Volume 1 Issue 10 November 2005 Goddard. Weiler and Judith Bruner, Associate Director for Safety and Security, encourages you to participate, NASA's Swift satellite has taken a top honor in the annual "Best of What's New" award from Popular

Christian, Eric

498

Squark and gluino production with jets  

SciTech Connect

We present cross section predictions for squark and gluino production at the LHC, in association with up to two additional hard jets. These cross sections can be very large in comparison to the inclusive Born rates. Because hadron collider experiments utilize hard jets in the reconstruction of cascade decays or as a way to separate squark and gluino production, the understanding of these processes is crucial. We show to what degree hard jet radiation can be described by shower algorithms and point out how tuning these showers, for example to top quark pair production, could help reduce theoretical uncertainties for new physics searches at the LHC.

Plehn, T.; /Munich, Max Planck Inst.; Rainwater, D.; /Rochester U.; Skands, P.; /Fermilab

2005-10-01T23:59:59.000Z

499

Jet spoiler arrangement for wind turbine  

DOE Patents (OSTI)

An air jet spoiler arrangement is provided for a Darrieus-type vertical axis wind-powered turbine. Air is drawn into hollow turbine blades through air inlets at the end thereof and is ejected in the form of air jets through small holes or openings provided along the lengths of the blades. The air jets create flow separation at the surfaces of the turbine blades, thereby including stall conditions and reducing the output power. A feedback control unit senses the power output of the turbine and controls the amount of air drawn into the air inlets accordingly.

Cyrus, J.D.; Kadlec, E.G.; Klimas, P.C.

1983-09-15T23:59:59.000Z

500

Top quark jets at the LHC  

Science Journals Connector (OSTI)

We investigate the reconstruction of high pT hadronically decaying top quarks at the Large Hadron Collider. One of the main challenges in identifying energetic top quarks is that the decay products become increasingly collimated. This reduces the efficacy of conventional reconstruction methods that exploit the topology of the top quark decay chain. We focus on the cases where the decay products of the top quark are reconstructed as a single jet, a top jet. The most basic top-tagging method based on jet mass measurement is considered in detail. To analyze the feasibility of the top-tagging method, both theoretical and experimental aspects of the large QCD jet background contribution are examined. Based on a factorization approach, we derive a simple analytic approximation for the shape of the QCD jet mass spectrum. We observe very good agreement with the MonteCarlo simulation. We consider high-pT tt production in the standard model as an example, and show that our theoretical QCD jet mass distributions can efficiently characterize the background via sideband analyses. We show that with 25??fb-1 of data, our approach allows us to resolve top jets with pT?1??TeV, from the QCD background, and about 1.5TeV top jets with 100??fb-1, without relying on b-tagging. To further improve the significance we consider jet shapes (recently analyzed in 10), which resolve the substructure of energy flow inside cone jets. A method of measuring the top quark polarization by using the transverse momentum of the bottom quark is also presented. The main advantages of our approach are (i)the mass distributions are driven by first principle calculations, instead of relying solely on MonteCarlo simulation; (ii)for high pT jets (pT?1??TeV), IR-safe jet shape variables are robust against detector resolution effects. Our analysis can be applied to other boosted massive particles such as the electroweak gauge bosons and the Higgs.

Leandro G. Almeida; Seung J. Lee; Gilad Perez; Ilmo Sung; Joseph Virzi

2009-04-16T23:59:59.000Z