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  • Other Sources  (790)
  • SPACECRAFT PROPULSION AND POWER  (749)
  • Fluid Mechanics and Thermodynamics
  • 1975-1979  (760)
  • 1950-1954  (30)
  • 1
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    Fluid valve with wide temperature range (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A fluid valve suitable for either metering or pressure regulating fluids at various temperatures is provided for a fuel system as may be utilized in an aircraft gas turbine engine. The valve includes a ceramic or carbon pad which cooperates with a window in a valve plate to provide a variable area orifice which remains operational during large and sometimes rapid variations in temperature incurred from the use of different fuels.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    NASA electric propulsion program (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The NASA Electric Propulsion technology program is focused at three major specific objectives - to develop the Baseline Solar Electric Propulsion (SEP) technology for interplanetary transportation applications; to develop ion thruster technology for auxiliary propulsion applications; and to research fundamental processes and advanced concepts. This paper will discuss accomplishments since the last Electric Propulsion Conference, the current status of the program, and future directions.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 79-2118 , International Electric Propulsion Conference; Oct 30, 1979 - Nov 01, 1979; Princeton, NJ
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Glossary of terms and table of conversion factors used in design of chemical propulsion systems (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The glossary presented is based entirely on terms used in the monographs on Chemical Propulsion. Significant terms relating to material properties and to material fabrication are presented. The terms are arranged in alphabetical order, with multiple word terms appearing in the normal sequence of usage; for example, ablative cooling appears as such, not as cooling, ablative, and lip seal appears as such, not as seal, lip. Conversion Factors for converting U.S. customary units to the International System of Units are presented in alphabetical order of the physical quantity (e.g., density, heat flux, specific impulse) involved.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-SP-8126
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Space power for space (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The total energy demanded by space missions of the future is expected to exceed past needs by orders of magnitude. The unit costs of this energy must be reduced from present levels if these missions are to be carried out at projected budget levels. The broad employment of electric propulsion and the capability to utilize novel high power sensors hinge on the availability of systems lighter by factors of ten or more than have flown to date. The NASA program aimed at providing the technological basis to meet these demands is described in this paper. Research and technology efforts in areas of energy conversion, storage and management are covered. In addition, work aimed at evolving the understanding necessary to cope with space environment interactions and at advanced concepts is described.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Space Congress; Apr 26, 1978 - Apr 28, 1978; Cocoa Beach, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Evolution of space power systems (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: NASA planning for large power systems (tens to hundreds of kilowatts) in space for the next decade is summarized. Applications requiring large amounts of power, the selection of solar photovoltaic as the primary power conversion approach, and the power technology base are explained. Large power systems, beginning with a Space Shuttle/Spacelab power augmentation kit and an orbitally stored Power Module, are described.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 78-43 , International Astronautical Federation, International Astronautical Congress; Oct 01, 1978 - Oct 08, 1978; Dubrovnik; Yugoslavia
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    OAST space power technology program (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The current research and technology (R and T) base program is first described, then special attention is directed toward outlining a new system technology specifically oriented toward providing the utility power plant technology base for semi-permanent earth orbital facilities expected to be needed in the middle to late 1980's. The R and T program involves five areas of research: (1) photovoltaic energy conversion; (2) chemical energy conversion and storage; (3) thermal-to-electric conversion; (4) environment interactions; and (5) power systems management and distribution. The general objectives and planned direction of efforts in each of these areas is summarized.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Lewis Res. Center Future Orbital Power Systems Technol. Requirements; p 1-16
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    NASA TECHNICAL REPORTS
  • 7
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    Manufacture of ionizers intended for electric propulsion (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: An electric propulsion system which relies on the formation of cesium ions in contact with a porous wall made of a metal with a high work function when the wall is heated to 1500 K was described. The manufacture of porous walls on the mountings was considered. Erosion of the electrodes by slow ions was examined, and the life times of the ionizers was estimated by means of experimental studies. The purpose of the electric propulsion system was to bring about minor corrections in the orbits of geostationary satellites; the main advantage of this system was that it weighs less than currently used hydrazine systems.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-TM-75280 , ONERA-TP-1977-36 , Seminaire Plansee de Re Metallica, 9th Reutte; May 23, 1977 - May 26, 1977; Austria
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Gaseous-fuel nuclear reactor research for multimegawatt power in space (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: In the gaseous-fuel reactor concept, the fissile material is contained in a moderator-reflector cavity and exists in the form of a flowing gas or plasma separated from the cavity walls by means of fluid mechanical forces. Temperatures in excess of structural limitations are possible for low-specific-mass power and high-specific-impulse propulsion in space. Experiments have been conducted with a canister filled with enriched UF6 inserted into a beryllium-reflected cavity. A theoretically predicted critical mass of 6 kg was measured. The UF6 was also circulated through this cavity, demonstrating stable reactor operation with the fuel in motion. Because the flowing gaseous fuel can be continuously processed, the radioactive waste in this type of reactor can be kept small. Another potential of fissioning gases is the possibility of converting the kinetic energy of fission fragments directly into coherent electromagnetic radiation, the nuclear pumping of lasers. Numerous nuclear laser experiments indicate the possibility of transmitting power in space directly from fission energy. The estimated specific mass of a multimegawatt gaseous-fuel reactor power system is from 1 to 5 kg/kW while the companion laser-power receiver station would be much lower in specific mass.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IAF PAPER 77-140
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Liquid rocket disconnects, couplings, fittings, fixed joints, and seals (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: State of the art and design criteria for components used in liquid propellant rocket propulsion systems to contain and control the flow of fluids involved are discussed. Particular emphasis is placed on the design of components used in the engine systems of boosters and upper stages, and in spacecraft propulsion systems because of the high pressure and high vibration levels to which these components are exposed. A table for conversion of U.S. customary units to SI units is included with a glossary, and a list of NASA space vehicle design criteria monographs issued to September 1976.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA-SP-8119
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    NASA TECHNICAL REPORTS
  • 10
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    Satellite power systems program (1978)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The Department of Energy and NASA are engaged in an intense three-year analysis to determine what course of action the Federal government should pursue relative to this nonconventional energy system. Information is presented in the form of charts for the following: (1) program organization; (2) major program milestones; (3) activity schedule for the program; (4) preliminary baseline comparison by two Systems Definition Centers; and (5) program definition plan (funding by agency management responsibility).
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Lewis Res. Center Future Orbital Power Systems Technol. Requirements; p 107-111
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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