Gaseous hydrogen requirements for the discharge of liquid hydrogen from a 1.52 meter /5 ft/ diameter spherical tank
Physical parameter effect on pressurant gas requirements during expulsion of liquid hydrogen from spherical tanks
Dewitt, R. L.↗
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Results for “Pressure effects”
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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Incipient separation of a turbulent boundary layer at high Reynolds number in two- dimensional supersonic flow over a compression corner
Mach number effects on pressure caused incipient separation of turbulent boundary layer in two dimensional supersonic corner flow
Roshko, A.↗
Stress waves resulting from hypervelocity impact.
Characteristics method for stress waves from hypervelocity impact of circular cylinder on half space, discussing numerical diffusion effect on pressure and flow fields
Chang, T. S.↗
Unsteady MHD flow in arbitrary ducts by point-matching method.
Unsteady MHD conducting fluid flow in arbitrary ducts under transverse magnetic field, studying effects of pressure gradient impulsive change
Jeng, D. R.↗
Longitudinal instability limits with a variable length hydrogen-oxygen combustor.
Hydrogen-oxygen variable length combustor longitudinal instability, studying hydrogen injection temperature effects on pressure interaction index and pressure sensitive time lag
Morgan, C. J.↗
General instability of inclined-stiffened cylinders under bending
Stiffener inclination effect on pressurized cylinder instability under pure bending
Lee, R.-L.↗
Servo-controlled decoupler eliminates oscillations in fluid flow - A concept
Active control technique, using accelerometer-controlled servovalve to operate a compensating piston, effectively eliminates pressure fluctuations due to longitudinal structural vibration within a relatively long bandwith.
Fenwick, J. R.↗
Method for calculating the stresses in pressure vessels
Calculation of elastic and plastic stresses at axisymmetric discontinuities is based on nonlinear elastic theory incorporating pressure coupling effects.
Skogh, J.↗
Study of turbojet combustor dynamics using sweep-frequency data
Sweep frequency nozzle pressure oscillation effects on turbojet combustor dynamics
Bruton, W. M.↗
A study of the mixing of hydrogen injected normal to a supersonic airstream
Jet to free-stream dynamic pressure ratio effects on penetration and mixing of hydrogen injected normal to supersonic airstreams
Rogers, R. C.↗
Measurement of the effect of air bubbles on the speed of sound in water
Acoustic velocity in water, examining air bubble effects on pressure pulse attenuation
Gibson, F. W.↗
The radiation of sound from an engine exhaust
Internal combustion engine exhaust system sound radiation, discussing pressure wave effects, energy flux and boundary conditions
Alfredson, R. J.↗
A folded all-reflecting Schmidt camera and ultraviolet image converter for space-astronomy applications
Folded all-reflecting Schmidt camera UV image converter system for space astronomy applications, discussing pressure sensitivity effects on UV direct recording emulsion
Ocallaghan, F. G.↗
Multilayer high performance insulation materials
A number of tests are required to evaluate both multilayer high performance insulation samples and the materials that comprise them. Some of the techniques and tests being employed for these evaluations and some of the results obtained from thermal conductivity tests, outgassing studies, effect of pressure on layer density tests, hypervelocity impact tests, and a multilayer high performance insulation ambient storage program at the Kennedy Space Center are presented.
Stuckey, J. M.↗
Sonic boom effect on fish: Observations
Motion pictures of fish in a small tank at the time a bullet traveling 1200 m/sec passes a few centimeters above indicate that fish sense the passage of the shock wave but suffer no ill effects. The pressure rise at the bow shock wave was 0.26 atm or 275 times that associated with a strong sonic boom, for example, from the proposed supersonic transport.
Wilkins, M. E.↗
Effects of high combustion chamber pressure on rocket noise environment
The acoustical environment for a high combustion chamber pressure engine was examined in detail, using both conventional and advanced theoretical analysis. The influence of elevated chamber pressure on the rocket noise environment was established, based on increase in exit velocity and flame temperature, and changes in basic engine dimensions. Compared to large rocket engines, the overall sound power level is found to be 1.5 dB higher, if the thrust is the same. The peak Strouhal number shifted about one octave lower to a value near 0.01. Data on apparent sound source location and directivity patterns are also presented.
Pao, S. P.↗
Delta launch vehicle isogrid structure NASTRAN analysis
Structural analysis applications of NASTRAN to the isogrid structure of the Delta launch vehicle are discussed. Isogrid is a method employed to stiffen the booster cylindrical shell surface by integrally machining ribs and skin from one piece of metal. The ribs are arranged in a repetitive equilateral triangular pattern; this results in a structural surface whose stiffness is orthogonally isotopic. For that structure, both static and general instability buckling analyses are described and the theoretical results are compared to test data. One of the parameters included in the analysis is the effect of pressure loadings on the buckling allowable load. In addition, a description of a supplementary computer program is presented.
Knighton, D. J.↗
Kinetic energy and quasi-biennial oscillation.
The modulation of the vertical flux of kinetic energy to the stratosphere by the pressure-work effect at 100 mb is compared with variations in the hemispheric kinetic energy, the horizontal momentum and heat transports at 'low' latitudes, and the tropical zonal wind and temperature for the lower stratosphere. It is deduced that the variation of the vertical flux of geopotential is in phase with the kinetic energy in the lower stratosphere and is statistically related to the time rate of change of the horizontal transports of heat and momentum at 30 N. The association of these results to the general circulation of the lower stratosphere is considered.
Miller, A. J.↗