On secondary gas injection in supersonic nozzles.
Thrust-vector control and flow field produced by secondary gas injection into supersonic stream
GAS FLOW↗
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Results for “INJECTION”
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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Effect of mass injection into a cavity on hypersonic boundary-layer transition.
Effect of mass injection into cavity on hypersonic boundary layer transition and on heating downstream
HYPERSONIC HEAT TRANSFER↗
Proportional solid propellant secondary injection thrust vector control study
Proportional hot gas secondary injection thrust vector control system for high energy solid propellant rocket motor
PROPORTIONAL CONTROL↗
Research study for determination of liquid surface profile in a cryogenic tank during gas injection Quarterly progress report no. 9, Jun. 18 - Sep. 17, 1966
Determining liquid surface profiles in cryogenic tank during gas injection
GAS INJECTION↗
Freon injection techniques for Saturn systems leak check Final report
Freon 22-air injection system for pressurizing tanks for Saturn systems leak check
SATURN LAUNCH VEHICLE↗
Effect of simulated bearing coolant injection on the performance of a two-stage, velocity-compounded turbopump drive turbine
Simulated bearing coolant injection effect on performance of two stage, velocity compounded turbojet drive turbine
TURBOPUMP↗
Concentration measurements of an injected gas in a supersonic stream
Tracer gas technique use to measure concentration of gas injected into supersonic air stream
GAS INJECTION↗
Helium pressurant requirements for liquid- hydrogen expulsion using submerged gas injection
Helium pressurant requirements for liquid hydrogen expulsion using submerged gas injection
EXPULSION↗
Analytical investigation of key problems in the water-injection-cooled diffuser for nuclear rocket engine/stage test stands 2 - 3 Final report
Revised computer program on feasibility of water injection-cooled diffuser for nuclear rocket engine/stage test stands
NUCLEAR ROCKET↗
The effect of mass injection on heat transfer from a partially dissociated gas stream.
Hydrogen and helium injection effect on local heat transfer to porous surface from dissociated turbulent boundary layer
TURBULENT BOUNDARY LAYER↗
Mass transfer cooling in laminar boundary layers with hydrogen injected into nitrogen and carbon dioxide streams.
Surface property effects on effectiveness of mass transfer cooling in laminar boundary layers with hydrogen injected into free stream of nitrogen or carbon dioxide
SURFACE COOLING↗
Direct measurement of compressible, turbulent boundary layer skin friction on a porous flat plate with mass injection.
Skin friction under mass injection on porous flat plate in supersonic turbulent flow
SUPERSONIC FLOW↗
Effect of Propellant Injection Through Electrodes on Potential Distribution in an MPD ARC
Propellant injection through electrodes effect on potential distribution in MPD arc
PLASMA POTENTIAL↗
Mean droplet size for cross-stream water injection into a Mach 8 air flow.
Mean droplet size for cross stream water injection into Mach 8 air flow determined by scattered light angular variation measurement
LIGHT SCATTERING↗
Flow visualization of a secondary jet by means of lampblack injection techniques.
Fluid flow processes for secondary sonic jet injection into Mach 6 free stream, noting upstream flow into separated flow regions
FLOW VISUALIZATION↗
Direct measurement of skin friction on a porous flat plate with mass injection.
Skin friction under mass injection on porous flat plate in supersonic turbulent flow
TURBULENT BOUNDARY LAYER↗
Evaluation of centrifugal compressor performance with water injection
The effects of water injection on a compressor are presented. To determine the effects of varying water-air ratio, the compressor was operated at a constant equivalent impeller speed over a range of water-air ratios and weight flows. Operation over a range of weight flows at one water-air ratio and two inlet air temperatures was carried out to obtain an indication of the effects of varying inlet air temperature. Beyond a water-air ratio of 0.03 there was no increase in maximum air-weight flow, a negligible rise in peak total-pressure ratio, and a decrease in peak adiabatic efficiency. An increase in inlet air temperature resulted in an increase in the magnitude of evaporation. An analysis of data indicated that the magnitude of evaporation within the compressor impeller was small.
COMPRESSORS - RADIAL FLOW↗
Enhanced animal growth via ligand-regulated GHRH myogenic-injectable vectors
Regulated animal growth occurred following a single electroporated injection of a mixture of two plasmids (10 microg of DNA), one expressing the GeneSwitch regulator protein, the other an inducible growth hormone releasing hormone (GHRH) gene, into the tibialis anterior muscles of adult SCID mice. Administration of the ligand mifepristone (MFP) up-regulated GHRH expression, as shown by elevations of IGF-I levels, and when MFP dosing was withdrawn, IGF-I returned to baseline levels. Five cycles of IGF-I induction were observed during a five-month period. Chronic MFP dosing for 25 days increased lean body mass, weight gain, and bone mineral density significantly compared with non-MFP treated controls. In summary, long-term drug-regulated GHRH expression was achieved following plasmid-based gene therapy, and chronic induction of GHRH expression in adult animals led to improvements in weight gain and body composition.
NASA Discipline Musculoskeletal↗