Diffusion welding of dissimilar metals.
Diffusion welding of aluminum alloys and austenitic stainless steel tubular joints
STAINLESS STEEL↗
SEARCH · Engineering Papers
Results for “diffuser”
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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The eddy diffusivities, energy balance parameters, and heating rate of upper atmospheric turbulence.
Thermal and momentum eddy diffusivities computed from wind profile and turbulence of rocket released chemical clouds
TURBULENCE EFFECT↗
Diffusion bonding of titanium sandwich structure for Saturn tank wall application.
Diffusion bonding of titanium sandwich structure for Saturn tank wall application
TITANIUM ALLOY↗
Interplanetary diffusion and cosmic ray modulation.
Interplanetary particle diffusion model analysis in terms of energy, position in space, direction and time
TIME FUNCTION↗
Tritium diffusion measurements of proton- irradiated samples of the iron meteorite Sikhote-Alin
Tritium diffusion from iron meteorite shortly after fall established by artificial proton irradiation
TRITIUM↗
Diffusion of solar protons.
Solar proton diffusion data for model of quiescent interplanetary medium
SOLAR PROTON↗
Kinetics of oxide film growth on metal crystals - Electron tunneling and ionic diffusion.
Growth rate of oxide and other dielectric contact films on metal crystals computed for ionic diffusion and electron tunneling
GROWTH↗
A balloon-borne diffusing system for infrared radiation from 1 mu to 5 mu.
Balloon-borne diffusing system designed to measure absorption of minor atmospheric constituents, as sun set and passed below horizon
SOLAR RADIATION↗
Thermal diffusion in the topside ionosphere.
Thermal diffusion in topside ionosphere, stressing effect on ion density profiles
IONOSPHERIC ION DENSITY↗
A diffusion model for the propagation of gases in the lunar atmosphere - Contamination by the Lunar Module exhaust.
Two-dimensional diffusion model for gas propagation in lunar atmosphere, discussing contamination by lunar module exhaust gases and solar wind loss mechanism
EXHAUST GAS↗
The determination of thermal diffusivities of thermal energy storage materials. I.
Thermal diffusivities of thermal energy storage materials from solid surface temperature measurements, discussing advantages of transient method
MATERIAL TESTING↗
Radiation temperature and enhanced diffusion in a radio-frequency discharge.
Helium RF discharge radiation temperature as magnetic field function measured, discussing enhanced diffusion role in radiation temperature determination
RADIO FREQUENCY DISCHARGE↗
Present status of lithium-diffused silicon solar cells.
Spontaneous annealing models of lithium- diffused Si solar cells, discussing defect compensation and metastable defect formation
SOLAR CELL↗
Diffusion thermopower and the Fermi surface in dilute silver-gold alloys.
Alloying effect on diffusion thermopower in relation to Fermi surface variations in dilute silver-gold alloys
ANNEALING↗
Investigation at Mach Numbers 2.98 and 2.18 of Axially Symmetric Free-jet Diffusion with a Ram-jet Engine
An investigation was conducted to determine the effectiveness of a free-jet diffuser in reducing the over-all pressure ratios required to operate a free jet with a large air-breathing engine as a test vehicle. Efficient operation of the free jet was determined with and without the considerations required for producing suitable engine-inlet flow conditions. A minimum operating pressure ration of 5.5 was attained with a ratio of nozzle-exit to engine-inlet area of 1.85. Operation of the free jet with unstable engine-inlet flow (buzz) is also included.
WIND TUNNELS↗
Some Observations of Shock-induced Turbulent Separation on Supersonic Diffusers
A survey of experimental data at supersonic speed indicated that shock-induced separation of a turbulent boundary layer will result for Mach numbers of approximately 1.33 or greater when a theoretical stream static-pressure-rise ratio of approximately 1.89 occurs across a shock interacting with the boundary layer. The significance of this tentative criterion for turbulent boundary-layer separation is discussed with respect to the design of supersonic diffusers.
BOUNDARY-LAYER CONTROL--INTERNAL AERODYNAMICS↗
The diffusion of a hot air jet in air in motion Part II : the flow field in the transition zone
The turbulent diffusion of a hot air jet in air can be divided into two zones, the core and the transition zone. The present report deals with the transitional zone.
FLOW, TURBULENT - DIFFUSION↗
Probing porous media with gas diffusion NMR
We show that gas diffusion nuclear magnetic resonance (GD-NMR) provides a powerful technique for probing the structure of porous media. In random packs of glass beads, using both laser-polarized and thermally polarized xenon gas, we find that GD-NMR can accurately measure the pore space surface-area-to-volume ratio, S/V rho, and the tortuosity, alpha (the latter quantity being directly related to the system's transport properties). We also show that GD-NMR provides a good measure of the tortuosity of sandstone and complex carbonate rocks.
NASA Discipline Environmental Health↗