SPACE BACKGROUND TEMPERATURE AND THERMAL RADIATION
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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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Fortran program for estimating radiant heat flux in base of arbitrary shape from intersection region caused by interaction of hydrogen-oxygen engine exhaust jets
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Diopside, peridot and oligoclase optical constants found by measuring reflectance and transmittance spectra at high temperatures
Materials limitations and problems for direct energy conversion methods of thermoelectricity, solar cells, thermionics and fuel cells
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Data from absorption coefficients and fine-structure parameters measured for water vapor have been incorporated in an analytic program useful in evaluating heating by radiation from the exhaust plume of a large rocket.
Solar absorptance, total hemispherical emittance and absorptance/emittance ratio for metals at cryogenic temperatures measured simultaneously with sinusoidally perturbed incident radiation
Direct energy conversion and materials limitations, discussing thermoelectricity, solar cells, thermionics and fuel cells
Directional characteristics of lunar IR radiation accounted for by crater model
Extinction parameters of submicron carbon, tungsten and Si particles in hydrogen measured at various temperatures, discussing scattering amplitude functions and Monte Carlo calculations
Development of method for protecting large and oddly shaped areas from radiant and convective heat
Nuclear light bulb engine propellant stream radiant heating simulation using 500 kW dc arc and argon seeded with carbon particles
Extinction parameters of submicron carbon, tungsten and Si particles in hydrogen measured at various temperatures, discussing scattering amplitude functions and Monte Carlo calculations
The differential scattering parameter has been measured for 0.04-micron tungsten particles in hydrogen and nitrogen at temperatures to 1080 K. The differential scattering parameter has also been measured for 0.1 micron tungsten, three types of carbon particles, and fly ash in nitrogen at temperatures to 1000 K. The 0.04 micron tungsten shows a temperature dependent total scattering parameter varying from around 4000 sq cm per g at room temperature to 7000 sq cm per g at 1088 K. The temperatures over which data were obtained are not high enough to confirm the temperature dependence of the total scattering parameter of tungsten.
Three silicide coated columbium alloys and two cobalt alloys were subjected to identical simulated reentry profiling exposures in both static (controlled vacuum leak) and dynamic (hypersonic plasma shear) environments. Primary emphasis in the columbium alloy evaluation was on the Cb752 and C129Y alloys with a lesser amount on FS85. Commercial silicide coatings of the R512E and VH109 formulations were used. The coated specimens were intentionally defected to provide the types of coating flaws that are expected in service. Temperatures were profiled up to peak temperatures of either 2350 F or 2500 F for 15 minutes in each cycle.