Thin film penetration by hypervelocity microparticles
Thin film penetration by hypervelocity microparticles of carbonyl iron
Lewis, A. R.↗
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Results for “PENETRATION”
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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Explosive oxidations initiated by simulated meteoroid penetration into spacecraft atmospheres
Explosive oxidation hazard in simulated meteoroid S-4B impact penetration into spacecraft atmosphere
Carden, W. H.↗
Micrometeoroid penetration measuring device Patent
Measuring micrometeroid depth of penetration into various materials
Kinard, W. H.↗
Dye penetrant for surfaces subsequently contacted by liquid oxygen Patent
Dye penetrant and technique for nondestructive tests of solid surfaces contacted by liquid oxygen
Giles, R. M. F.↗
Correlation of secondary sonic and supersonic gaseous jet penetration into supersonic crossflows
Effect of injection Mach number on jet penetration over wide range of pressure and free stream Mach numbers
Povinelli, F. P.↗
Jet penetration into Mach 2 airstream using sweptback injectors at angle of attack
Jet penetration into Mach 2 airstream using sweptback injectors at angle of attack
Hersch, M.↗
Penetration of high energy radiation
Computer programs for calculating penetration and diffusion of electrons and associated bremsstrahlung through extended media
Source record↗
Launch vehicle gust penetration loads
Saturn launch vehicle gust penetration loads, presenting separated flow and associated time lag effects
Ericsson, L. E.↗
Penetration to second order of an electrostatic field into a warm plasma
Electrostatic field second order penetration into Vlasov warm electron plasma, using electron velocity distribution models
Lewak, G. J.↗
Measurement of the surface inductance and penetration depth of superconducting aluminum
Pure superconducting Al wire surface inductance measurement as function of temperature, noting penetration depth value
Faraci, G.↗
'Vegetation penetration' with K-band imaging radars
Vegetation penetration with K-band side-looking airborne imaging radars, noting multifrequency multipolarization system application for terrain reconnaissance
Macdonald, H. C.↗
Design of a probe for deep penetration into Jupiter's atmosphere
Jupiter probe design and communication for deep penetration into atmosphere, concerning mission phases through entry and descent to sample altitudes
Cross, D.↗
Cone penetration resistance test - An approach to evaluating in-place strength and packing characteristics of lunar soils
Cone penetration resistance tests on granular lunar soil simulants for in-place shear strength and packing characteristics under various gravity conditions
Cohron, G. T.↗
An empirical relationship for the penetration of 1 to 3 MeV electrons
Empirical correlation of high energy electrons into materials allows predictions of practical ranges (measure of electron penetration) for different elements and alloys.
Stevenson, F. R.↗
Atomization, drop size, and penetration for cross-stream water injection at high-altitude reentry conditions with application to the RAM C-1 and C-3 flights
Atomization, drop size, and penetration data are presented for cross stream water injection at conditions simulating high altitude reentry (low Weber number, high static temperature, high Knudsen number, and low static pressure). These results are applied to the RAM C-1 and C-3 flights. Two primary breakup modes are considered, vapor pressure or flashing and aerodynamic atomization. Results are given for breakup boundaries and mean drop size for each of these atomization mechanisms. Both standard and flight orifice geometries are investigated. The data were obtained in both a static environment and in conventional aerodynamic facilities at Mach numbers of 4.5 and 8. The high temperature aspects of reentry were simulated in a Mach 5.5 cyanogen-oxygen tunnel with total temperature of 4500 K.
Gooderum, P. B.↗
Microwave properties of geological materials: Studies of penetration depth and moisture effects
Summarized are the results of two of a series of controlled experiments performed during the summer of 1970. The first series of experiments to determine penetration depth showed the value of having a modeled response and data reduced in real time for examination in the field. The results suggest a radiometric method for measuring the microwave properties of materials in bulk and are applicable to studies of sea ice and other naturally layered media. The sensitivity of the microwave emission to changes in moisture content has inspired a number of airborne and ground based investigations. Although the effect is dominent under certain conditions, the complicating factors of soil type, roughness, vegetation, etc. seem to govern the conclusions regarding its application at this time.
Blinn, J. C., III↗
Dye penetrant indications caused by superficial surface defects in 2014 aluminum alloy welds.
Demonstration that dye penetrant indications on the heat-affected zone of 2014-T6 aluminum GMA weldments are frequently caused by superficial surface conditions and are less than 0.007 in. deep. The following methods are suggested for minimization of these surface defects: stabilization of the arc, application of dc ?GTA' welding procedures, reduction of the caustic etch time, and use of fine grain materials.
Hocker, R. G.↗
Penetration of solar irradiances through the atmosphere and plant canopies.
The equation of radiative transfer is applied to an analysis of solar irradiances penetrating into a plant canopy covered by a turbid atmosphere. The method of discrete coordinates is applied to vertically inhomogeneous atmospheres and plant canopies. It is shown that four-point quadrature yields results with an accuracy that is consistent with irradiance measurements. It is believed that the presented computational scheme may have considerable agricultural applications.
Weinman, J. A.↗