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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Friction tests for Mariner Mars 1969 spacecraft mechanisms in ultrahigh vacuum molecular sink chamber, noting increased friction attributed to vacuum environment
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Compatibility tests for spacecraft construction materials by specimen encapsulation with liquid rocket propellants
Surveyor spacecraft testing at Environmental Test Laboratory, describing facilities and innovations designed for temperature extremes
Liquid metal MHD power conversion system with Cs and Li as working fluids, describing hydraulic, electrical and high temperature tests results
Bibliography of technical reports on scientific and engineering studies, November 1970
Bibliography of technical reports on scientific and engineering studies, December 1970
Outer planetary mission planning and technological improvements for outer planet spacecraft
Aerodynamic characteristics, rocket nozzles, spacecraft propulsion, antenna design, and internal combustion engines
Comparative sting supported and free flight tests in hypersonic wind tunnel on modified Apollo launch configuration
Summary report including studies on computer programs, management systems, materials, orbits and trajectories, photography, power sources, propulsion, and telecommunication for space missions
The computer program listing for the MAIN program and those subroutines unique to the fault tree analysis are described. Some subroutines are used for analyzing the reliability block diagram. The program is written in FORTRAN 5 and is running on a UNIVAC 1108.
The computer program listing for the reliability block diagram computation program described in Reliability Computation From Reliability Block Diagrams is given. The program is written in FORTRAN 4 and is currently running on a Univac 1108. Each subroutine contains a description of its function.
A major concern in the integration of a radioisotope thermoelectric generator (RTG) with a spacecraft designed to explore the outer planets is the effect of the emitted radiation on the normal operation of scientific instruments. The necessary techniques and tools developed to allow accurate calculation of the neutron and gamma spectrum emanating from the RTG. The specific sources of radiation were identified and quantified. Monte Carlo techniques are then employed to perform the nuclear transport calculations. The results of these studies are presented. An extensive experimental program was initiated to measure the response of a number of scientific components to the nuclear radiation.
Instrumentation, data processing techniques, and physical processes for space application
Qualitative tests were made by injecting water through a rocket nozzle wall, and the droplet trajectories were observed photographically. These tests were conducted for nozzles in which boundary layer flow is significant. The tests indicated that both gases and particulate matter will be found in the region outside of the plume boundaries, and can be calculated using current analytical techniques. A test program is being conducted to measure the distribution of exhaust gases from small nozzles using an electron beam/photomultiplier system and a matrix of quartz crystal microbalances. Calibration tests, using simulated hydrazine exhaust product gas mixtures, were also conducted. The test program and results of the pumping calibration tests with hydrazine (simulated hydrazine exhaust products) are reported.
Quantitative evidence of gas flows in the far upstream region of small nozzles with large boundary layer flow are discussed. Gas mass fluxes were measured using quartz crystal microbalances. Both nitrogen and carbon dioxide gases were used as test gases. Gas deposition rates on the order of 100 monolayers per minute were detected 13 inches upstream of the nozzle exit plane. It is significant to note that the crystals detected gases considerably beyond the Prandtl-Meyer turning angle. The data from these tests will be essential in the formulation of scaling laws and analytical prediction methods for viscous plume behavior.