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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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Compact, cylindrical gas diffuser with radial exhaust slots and internal axial flow channels maintains the necessary pressure for the desired withdrawal rate of cryogenic liquids from tanks. The diffuser minimizes pressure loss which results from condensation of nitrogen gas in the liquid and prevents direct impingement of gas jets on liquid surface to reduce turbulence.
Von Laue and Cowley diffraction theories of coherent diffuse X-ray scattering from random alloys, predicting diffuse intensity singularities at reciprocal lattice points
Pure iron or iron-coated diaphragm provides a hydrogen diffusion electrode for a thermally regenerative galvanic cell. It allows the gas to diffuse through its interatomic spaces and resists the corrosive action of the cell environment.
The diffuser and nozzle of venturi meters are made as separate pieces for easier fabrication. Venturi meter efficiency is affected by the diffuser inlet diameter being greater than two percent larger than the throat diameter, by Reynolds number and by Mach number.
Steady state thermal diffusion in reacting gas mixtures, emphasizing relation of diffusion factors with thermal conductivity due to chemical reaction
Phosphorus diffusion into epitaxial silicon layers studied by electrical and structural characteristics of epitaxial diffused planar junctions
Diffusion coefficient of ordinary low molecular weight solutes in polymer solutions, noting variation of diffusivity from value in pure solvent
Venturi meter with separable diffuser and radial outward step at transition from throat to diffuser, noting effect of step on efficiency
Fast electron diffusion in stochastic magnetic field, obtaining diffusion coefficient as function of ratio of correlation time to Larmor period
Pitch angle diffusion of trapped electrons in terrestrial radiation zones, discussing diffusion theory based on Fokker-Planck equation, atmospheric Coulomb scattering mechanism, etc
Time dependent convection electric fields as agents for diffusing trapped magnetospheric radiation inward toward earth, discussing one dimensional diffusion equation
Venturi meter with separable diffuser and radial outward step at transition from throat to diffuser, noting effect of step on efficiency
Electron intensities in Starfish belt /1963- 1965/, discussing radial diffusion loss mechanism and pitch-angle diffusion
By calibrating X-ray machine with cells of known diffusion lengths, measurements on test cells can be madeate rate of one every two minutes with standard deviation of less than two percent. test cells are compared with calibration cells whose diffusion lengths have been measured by an electron beam method.
Diffusive transport term in hydrodynamic equations describing flow over strongly ablating entry objects, discussing charge separation and pressure diffusion
Thermal diffusion effects on F 2 region ion densities, deriving diffusion coefficients for partially ionized atomic oxygen plasma
Development of boron diffusion process to diffuse large quantities of stress-free, high efficiency, radiation resistant solar cells
Diffusion techniques for lithium-diffused silicon solar cells and cell electrical properties