Some problems of the fluidized-bed drying of heat-sensitive materials in a cyclic regime
Approximation method for calculating kinetics of fluidized-bed dehydration of heat-sensitive disperse material in symmetric high frequency regime
FLUIDIZED BED↗
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Results for “Drying”
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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Bearings use dry self-lubricating cage materials
Rolling element bearings in spacecraft mechanical systems use solid lubricant composites of polytetrafluoroethylene in the bearing cage which functions as the lubricant reservoir. The cage spaces the rolling elements equally and provides the lubricant at the bearing load-carrying surface.
Anderson, W. J.↗
Study to determine an improved method for Apollo propellant system decontamination and propellant tank drying Final report
Pressure-cycled vapor phase cleaning method for Apollo service module propellant tank decontamination
Mattson, G. C.↗
The Dry Massive Model of the Atmosphere of Venus and the Microwave Phase Effect
Calculating temperature profiles in thermal and convective boundary layers of Venus
Thaddeus, P.↗
Studies on Ethylene Oxide-freon 12 Decontamination and Dry-Heat Sterilization Cycles
Ethylene oxide-Freon decontamination and heat sterilization cycles
Campbell, B. A.↗
Dry-frictional shock absorber
Kinetic energy absorber that can safely decelerate a vehicle as it impacts a surface affords minimum rebound, is lightweight and compact, and needs no lubrication or hydraulic fluids.
Tener, W. M.↗
Forces due to a Command Service Module reaction control motor plume impinging on the Saturn 5 cluster arrangement Dry workshop version
Impingement loadings on Saturn 5 workshop cluster arrangement due to command service module reaction control motor
Penny, M. M.↗
Modification of physical properties of freeze-dried rice
Freeze cycling process consists of alternately freezing and thawing precooked rice for two cycles, rice is then frozen and freeze-dehydrated in vacuum sufficient to remove water from rice by sublimitation. Process modifies rice grain structure and porosity, enabling complete rehydration in one minute in hot water.
Huber, C. S.↗
Improved diamond coring bits developed for dry and chip-flush drilling
Two rotary diamond bit designs, one operating with a chip-flushing fluid, the second including auger section to remove drilled chips, enhance usefulness of tool for exploratory and industrial core-drilling of hard, abrasive mineral deposits and structural masonry.
Decker, W. E.↗
A Comparison of Aircraft and Ground Vehicle Stopping Performance on Dry, Wet, Flooded, Slush-, Snow-, and Ice-Covered Runways
Comparison of aircraft and surface vehicle stopping performance under varying runway conditions
Horne, W. B.↗
Quick, easy to prepare freeze-dried soups
Major advantages of soups are that they totally rehydrate in less than five minutes in water at approximately 150 deg F, maintain flavor and quality stability for two weeks in a 100 F environment, and remain stable for considerably longer at ambient temperatures. They are suitable for either household or field use.
Ramirez, R. V.↗
A study of the dry heat resistance of naturally occurring organisms widely dispersed on a surface
Although Bacillus subtilis var. niger is the standard test organism for NASA planetary quarantine sterilization studies, it was found that some naturally occurring soil organisms are more heat resistant. The separation of these organisms from soil particles is described. Experiments are discussed which were designed to show that the heat resistance is a natural characteristic of the organisms, rather than a condition induced by the clumping effect of agglomerated particles and organisms.
Garst, D. M.↗
Dry-heat Resistance of Bacillus Subtilis Var. Niger Spores on Mated Surfaces
Bacillus subtilis var. niger spores were placed on the surfaces of test coupons manufactured from typical spacecraft materials including stainless steel, magnesium, titanium, and aluminum. These coupons were then juxtaposed at the inoculated surfaces and subjected to test pressures of 0, 1000, 5000, and 10,000 psi. Tests were conducted in ambient, nitrogen, and helium atmospheres. While under the test pressure condition, the spores were exposed to 125 C for intervals of 5, 10, 20, 50, or 80 min. Survivor data were subjected to a linear regression analysis that calculated decimal reduction times.
Simko, G. J.↗
The indirect determination of stability, heat and momentum fluxes in the atmospheric boundary layer from simple scalar variables during dry unstable conditions.
Explore the source record for details and available documents.
Tillman, J. E.↗
Dry incineration of wastes for aerospace waste management systems.
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Labak, L. J.↗
A preliminary evaluation of dry season/drought status in the Sahelian zone of Mali, Mauritania and Senegal, based on ERTS-1 imagery
There are no author-identified significant results in this report.
Macleod, N. H.↗
Oxidation resistance of selected mechanical carbons at 650 deg C in dry flowing air
Oxidation experiments were conducted with several experimental mechanical carbons at 650 C in air flowing at 28 cu cm/sec (STP). Experiments indicate that boron carbide addition and zinc phosphate treatment definitely improved oxidation resistance. Impregnation with coal tar pitch before final graphitization had some beneficial effect on oxidation resistance and it markedly improved flexure strength and hardness. Graphitization temperature alone did not affect oxidation resistance, but with enough added boron carbide the oxidation resistance was increased although the hardness greatly decreased.
Allen, G. P.↗
Electrical properties of dry rocks
The mechanism by which atmospheric moisture affects the conductivity and dielectric constant of rock specimens was studied in time and frequency domains. It is suggested that adsorbed water molecules alter the surface conductivity in a manner similar to that observed in semiconductors and insulators. Powdered basalts show a low-frequency dispersion produced by the atmospheric moisture remaining in the pore system of the sample in a high vacuum; this effect is attributed to isolated adsorption centers. Simulated lunar permafrost at 100 K and a vacuum of 10 to the -8th power torr together with data on lunar samples contaminated with atmospheric moisture and the dielectric properties of ice at various temperatures indicate that, if permafrost exists in the moon it should present a relaxation peak at approximately 300 Hz; for temperatures up to 263 K it may go up to 20 KHz. It is concluded that in order to have electrical steady state conditions in rock samples it is necessary to have volume charge accumulations at interfaces within the sample and at the electrode sample interface. A method for measuring heterogeneous dielectrics with non-negligible ohmic and dielectric conductivities is proposed and experimentally verified.
Morrison, H.↗