Erosion of a three-stage potassium turbine
Rotor blade erosion of three-stage potassium turbine
Kaplan, G. M.↗
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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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Lunar cratering and erosion from Orbiter 5 photographs
Lunar cratering and erosion from Orbiter 5 photographs, observing crater densities, highland and maria regions, etc
Chapman, C. R.↗
A criterion for electrode erosion or entrainment in MPD arcs
Electrode erosion or entrainment in MPD arcs due to excess current density, considering inner cathode and outer ring anode with axial magnetic field
Hassan, H. A.↗
Measurement of electrode erosion during high- voltage vacuum breakdown
Electrode erosion during high voltage vacuum breakdown measured by neutron activation analysis and gamma ray spectrometry, noting plasma formation from electrode material
Fagen, W. F.↗
A model for small-impact erosion applied to the lunar surface
Lunar surface erosion model by small projectiles impact for analytic representation of crater shape change as function of time
Soderblom, L. A.↗
Comparison of actual versus predicted lunar surface erosion caused by Apollo 11 descent engine
Lunar surface erosion due to Apollo 11 descent engine
Mason, C. C.↗
Erosion testing of a three-stage potassium turbine
Nuclear space power three stage potassium turbine erosion testing in stainless steel loop with various contamination levels
Kaplan, G. M.↗
Lunar erosion rate and solar flare paleontology
Fe-group cosmic ray exposure tracks in Apollo 11 lunar rock interior, erosion rate and solar flare paleontology
Osullivan, D.↗
Effects of natural chemical impurities and crystallite orientation on the erosion behavior of artificial graphite
Effects of natural chemical impurities and crystallite orientation on erosion behavior of artificial graphite
Maahs, H. G.↗
A preliminary investigation of charge-exchange erosion of accelerator grid supports
Preliminary investigation to eliminate or reduce concentrated charge exchange ion erosion of accelerator grid supports for electron bombardment ion thrustors
Byers, D. C.↗
Effects of aeolian erosion on microbial release from solids
Spore release from solid materials by aeolian erosion on planetary surface
Green, R. H.↗
Experimental and analytical investigations on liquid impact erosion
Water impact erosion on stainless steel, Ni and Al and Ti alloys, observing impact velocity relationship with number
Gunasekaran, M.↗
Erosion of a three-stage potassium turbine
Three stage potassium vapor turbine for space systems electric power generation, discussing erosion and endurance tests
Kaplan, G. M.↗
Effects of aeolian erosion on microbial release from solids
Spores released from solids interiors by aeolian erosion on planetary surface, noting application to microbes in planetary quarantine
Green, R. H.↗
Vaporization from heated lunar samples and the investigation of lunar erosion by volatilized alkalis
Alkali metals vaporization from heated lunar samples, suggesting lunar rock erosion by localized heating due to volcanism or meteorite impact
Derby, J. V.↗
Erosion and mixing of the lunar surface from cosmogenic and primordial radionuclide measurements in Apollo 12 lunar samples
Lunar surface erosion and mixing from cosmogenic and primordial radionuclide measurement in Apollo 12 lunar rock and soil samples
Felix, W. D.↗
Very heavy solar cosmic rays: Energy spectrum and implications for lunar erosion
Particle tracks were investigated in the glass plate of a neutral density (clear flint) optical filter housed in the Surveyor 3 TV camera but exposed directly to space. The track density vs depth curve was determined and descends sharply from approximately 2.6 million tracks/sq cm at a depth of 3.6 mg/sq cm to about 35/sq cm at 700 mg/sq cm. Several tracks were of V-shapes characteristic of high energy induced fission. The erosion rate on the moon due to solar wind ions was determined from the energy spectrum, and was found to be low (0 to 2 x 10 to the minus 8th power cm/yr).
Fleischer, R. L.↗
Erosion of graphite surface exposed to hot supersonic hydrogen gas
A theoretical model based on laminar boundary layer flow equations was developed to predict the erosion rate of a graphite (AGCarb-101) surface exposed to a hot supersonic stream of hydrogen gas. The supersonic flow in the nozzle outside the boundary layer formed over the surface of the specimen was determined by assuming one-dimensional isentropic conditions. An overall surface reaction rate expression based on experimental studies was used to describe the interaction of hydrogen with graphite. A satisfactory agreement was found between the results of the computation, and the available experimental data. Some shortcomings of the model and further possible improvements are discussed.
Sharma, O. P.↗