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  • Other Sources  (167)
  • SPACECRAFT PROPULSION AND POWER  (163)
  • Fluid Mechanics and Thermodynamics
  • 1975-1979  (167)
  • 1950-1954
  • 1976  (167)
  • 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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    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
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    NASA electric propulsion program (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Major portions of the NASA electric propulsion technology program have attained the level of maturity required to achieve near-term technology readiness for flight missions for primary and auxiliary propulsion application. Advanced electric propulsion program elements addressing less immediate requirements are in more exploratory stages. This paper will discuss the NASA electric propulsion technology program including - planetary and earth orbit raising applications, attitude control and stationkeeping of geosynchronous satellites, and the research support program. Objectives, requirements, and hardware status are presented for each program.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 76-1068 , International Electric Propulsion Conference; Nov 14, 1976 - Nov 17, 1976; Key Biscayne, FL
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    NASA thermionic-conversion program (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The NASA applied research and technology (ART) program for thermionic energy conversion (TEC) is progressing effectively. Current out-of-core emphases allow converter material and design freedoms previously prohibited by in-core nucleonic and geometric restrictions. As a result, potential improvements indicate possibilities for severalfold increases in efficiencies. The new TEC-ART program concentrated initially on low-work-function collectors and interelectrode-loss reduction and revealed much in a short time. For example, arc-drop studies verified the necessity of stable emitters that operate well with little or no adsorbed cesium. This new emission capability coupled with improved collectors that maintain performance with emitter-vapor deposit accumulations are requisites for efficient, enduring thermionic converters. The accomplishments and contributors in these areas are discussed.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Conference on Intersociety Energy Conversion Engineering; Sep 12, 1976 - Sep 17, 1976; State Line, NV
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Reclaiming Waste Heat (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-16
    Description: 'Air-O-Space' heater, based on spacecraft heat, requires no fuel other than electricity to run fan. Installed in chimney flue, heat pipes transfer heat from waste hot gases (but not the gases themselves) to fresh air blown across the other end of the pipes. It can transport roughly 500 times the heat flux of the best solid conductors with a temperature drop of less than 3 degrees per foot. This instrument has also been used by Kin-Tek Laboratories Inc. to produce an instrument to calibrate gas analyzers for air-pollution monitoring.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: Spinoff 1976; 75
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Fuel cell heat and mass plate (1976)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A novel method and apparatus is provided for controlling heat and mass inventory in a fuel cell. Heat and mass, e.g. water, generated in the cell are removed by heat transfer and capillary action.
    Keywords: Fluid Mechanics and Thermodynamics
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Physics and potentials of fissioning plasmas for space power and propulsion (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-08-13
    Description: Fissioning uranium plasmas are the nuclear fuel in conceptual high-temperature gaseous-core reactors for advanced rocket propulsion in space. A gaseous-core nuclear rocket would be a thermal reactor in which an enriched uranium plasma at about 10,000 K is confined in a reflector-moderator cavity where it is nuclear critical and transfers its fission power to a confining propellant flow for the production of thrust at a specific impulse up to 5000 sec. With a thrust-to-engine weight ratio approaching unity, the gaseous-core nuclear rocket could provide for propulsion capabilities needed for manned missions to the nearby planets and for economical cislunar ferry services. Fueled with enriched uranium hexafluoride and operated at temperatures lower than needed for propulsion, the gaseous-core reactor scheme also offers significant benefits in applications for space and terrestrial power. They include high-efficiency power generation at low specific mass, the burnup of certain fission products and actinides, the breeding of U-233 from thorium with short doubling times, and improved convenience of fuel handling and processing in the gaseous phase.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Acta Astronautica; 3; July-Aug
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    ATS-6 solar cell flight experiment through 2 years in orbit (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: ATS-6 solar cell flight experiment data through 2 years of synchronous orbit operation are presented. Comparisons are made of the performances of the 13 different types of solar cell/cover configurations, including new cover processes and materials, and the Comsat violet cell. These performances are also compared: (1) to the performances of the LES-6 solar cell experiment, the ATS-6 main solar arrays, and the Hughes Aircraft Company solar arrays, and (2) to laboratory spectrum electron irradiations. It was found that the cells of the ATS-6 experiment generally performed as expected through 6 to 9 months in orbit, but that at 2 years they were more severely degraded than expected.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Photovoltaic Specialists Conference; Nov 15, 1976 - Nov 18, 1976; Baton Rouge, LA
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Electron and photon degradation in aluminum, gallium and boron doped float zone silicon solar cells (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Solar cells fabricated from Al, Ga and B doped Lopex silicon over a range of resistivities were tested under varying conditions of 1 MeV electron fluence, light exposures and thermal cycling. Results indicate that Al and Ga can replace B as a P type dopant to yield improved solar cell performance.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: Photovoltaic Specialists Conference; Nov 15, 1976 - Nov 18, 1976; Baton Rouge, LA
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Evolution and status of the 30-cm engineering model ion thruster (1976)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: In the past five years the 30-cm ion thruster has developed from infancy to maturity through the joint efforts of the NASA Lewis Research Center (LeRC) and the Hughes Research Laboratories (HRL). The evolution of the 30-cm thruster from the 200-series design to the present 900-series is described. This evolution has included both breadboard and engineering model type thrusters. The evolution description includes functional requirements, design, performance, endurance test results, and major features. The major part of the discussion centers on Hughes-built hardware although NASA LeRC contributions are reflected in the designs.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: AIAA PAPER 76-1006 , International Electric Propulsion Conference; Nov 14, 1976 - Nov 17, 1976; Key Biscayne, FL
    Format: text
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    NASA TECHNICAL REPORTS
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