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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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Particle concentrations and size distribution on Luster sounding rocket surfaces exposed to Leonid meteroid shower, comparing contamination and extraterrestrial origins
Apparatus tests flammability and ignition characteristics of materials in close proximity to incandescent metal fragments or spalls ejected from intermittent short circuit arcs in air or oxygen rich atmospheres. It simulates a situation where an exposed live wire makes contact with a grounded member in areas containing organic matter.
Degradation of multiplier phototubes exposed to spatial radiations
Dynamic response of uniform beams and plates exposed to sonic booms
Thermionic converter with fluorine vapor deposited tungsten emitter etched to expose crystal planes
Blood volume in rats exposed to high altitude and deacclimated at ambient pressure, noting changes and control level restoration
Postirradiation growth of cultured Chinese hamster cells exposed to UV light, including comparison with X irradiation
Conduction velocity in nerve exposed to high magnetic field
Dietary ascorbic acid effects as antioxidants in rats exposed to 100 percent oxygen
Stability of metallized fused silica and Teflon mirrors exposed to space temperature and radiation for orbiting solar reflectors
Crack growth threshold investigation of Inconel 718 exposed to high pressure oxygen
Multispectral remote sensing of exposed volcanic province near Mt. Lassen
Properties of ionization spectrometer exposed to 10, 20.5, and 28 GeV/c synchrotron accelerated protons
Dehydrogenases activities in rabbit retina homogenates exposed to oxygen at high partial pressure for various time periods
Survival of Antarctic dessert soil bacteria exposed to various temperatures and to three years of continuous medium-high vacuum
Chemical and metallurgical analyses of 6Al-4V titanium test specimens exposed to hydrazine /N2H2/ liquid propellant
Flutter of buckled plate exposed to static pressure differential and streamwise applied in- plane load, comparing experimental results with stability boundary calculations
A theoretical model based on laminar boundary layer flow equations was developed to predict the erosion rate of a graphite (AGCarb-101) surface exposed to a hot supersonic stream of hydrogen gas. The supersonic flow in the nozzle outside the boundary layer formed over the surface of the specimen was determined by assuming one-dimensional isentropic conditions. An overall surface reaction rate expression based on experimental studies was used to describe the interaction of hydrogen with graphite. A satisfactory agreement was found between the results of the computation, and the available experimental data. Some shortcomings of the model and further possible improvements are discussed.