Hot electrode drops in an unseeded supersonic argon magnetohydrodynamic generator
Floating potential profiles, electrode drops, and electrode temperature measurements in unseeded, supersonic argon magnetohydrodynamic generator
Mantenieks, M. A.↗
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Results for “drops”
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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Space shuttle with external hydrogen drop tanks
Guidelines for using space shuttle configuration to determine effects of carrying ascent LH2 propellant in external drop tanks
Thomason, H. E.↗
Analytical and experimental study of compressible laminar flow heat transfer and pressure drop of a gas in a uniformly heated tube
Numerical solutions of compressible laminar boundary layer heat transfer and pressure drop of gas in uniformly heated tube
Presler, A. F.↗
Experimental determination of pressure drop and flow characteristics of dilute gas-solid suspensions
Experimental determination of pressure drop and flow characteristics of dilute gas-solid suspensions in turbulent pipe flow
Pfeffer, R.↗
Hydrodynamic model of correlation of metal removal rates from repetitive drop impact
Steam turbine blade metal removal rates by repetitive water drop impact, using hydrodynamic model
Pouchot, W. D.↗
The interaction of an incident shock wave with liquid fuel drops
Incident shock wave interaction with liquid hydrocarbon fuel drops in oxidizing and inert atmospheres, considering combustion characteristics and ignition mechanism
Kauffman, C. W.↗
Shock-wave ignition of liquid fuel drops
Shock wave ignition of liquid fuel drop in oxidizing atmosphere, discussing combustion process
Kauffman, C. W.↗
The interaction of an incident shock wave with liquid fuel drops
Liquid hydrocarbon fuel drop interaction with incident shock wave in oxidizing and inert atmospheres, investigating aerodynamic shattering and combustion
Kauffman, C. W.↗
Anomalous behavior of liquid-nitrogen drops in film boiling
Liquid nitrogen drops anomalous behavior in Leidenfrost film boiling, investigating vapor instabilities effect on total vaporization time
Baumeister, K. J.↗
Wetting dynamics of evaporating drops on various surfaces
Room temperature evaporating water drop shape history on cooper, lucite, stainless steel and Teflon, observing wetting dynamics effects
Hsu, Y. Y.↗
Compensation of voltage drops in solid-state switches used with thermoelectric generators
Seebeck effect solid state switch was developed eliminating thermoelectric generator switch voltage drops. Semiconductor switches were fabricated from materials with large Seebeck coefficients, arranged such that Seebeck potential is generated with such polarity that current flow is aided.
Shimada, K.↗
A model for multiple-drop-impact erosion of brittle solids
A statistical model for the multiple-drop-impact erosion of brittle solids was developed. An equation for calculating the rate of erosion is given. The development is not complete since two quantities that are needed to calculate the rate of erosion with use of the equation must be assessed from experimental data. A partial test of the equation shows that it gives results that are in good agreement with experimental observation.
Engel, O. G.↗
Diffusive and radiative effects on vaporization times of drops in film boiling
Diffusive and radiative effects are incorporated into an analysis for the vaporization time of drops in film boiling. The momentum, energy, and continuity equations are solved with some appropriate simplifications so as to obtain a simple closed form solution for the overall film boiling heat transfer coefficient. Next, a theoretical expression for the droplet vaporization time is developed and compared to the measured vaporization times of water droplets vaporizing into air, argon, nitrogen, and helium. The agreement between experiment and theory is good. Under the helium blanket, the diffusive evaporative component is significant in comparison to the film boiling component.
Baumeister, K. J.↗
Pressure drop and pumping power for fluid flow through round tubes
Program, written for Hewlett-Packard 9100A electronic desk computer provides convenient and immediate solution to problem of calculating pressure drop and fluid pumping power for flow through round tubes. Program was designed specifically for steady-state analysis and assumes laminar flow.
Jelinek, D.↗
Drop coalescence in zero-gravity environment of Skylab IV
A series of experiments in cloud physics and fluid mechanics at near zero-gravity environment were made during NASA's Skylab IV mission. Color photographs taken aboard demonstrate the impaction and coalescence of two water drops of equal diameter and different color. Plans for a zero-gravity cloud physics laboratory for the Space Shuttle are indicated.
Vaughan, O. H.↗
Project Fog Drops 5. Task 1: A numerical model of advection fog. Task 2: Recommendations for simplified individual zero-gravity cloud physics experiments
A two-dimensional numerical model was used to investigate the formation of marine advection fog. The model predicts the evolution of potential temperature, horizontal wind, water vapor content, and liquid water content in a vertical cross section of the atmosphere as determined by vertical turbulent transfer and horizontal advection, as well as radiative cooling and drop sedimentation. The model is designed to simulate the formation, development, or dissipation of advection fog in response to transfer of heat and moisture between the atmosphere and the surface as driven by advection over horizontal discontinuities in the surface temperature. Results from numerical simulations of advection fog formation are discussed with reference to observations of marine fog. A survey of candidate fog or cloud microphysics experiments which might be performed in the low gravity environment of a shuttle-type spacecraft in presented. Recommendations are given for relatively simple experiments which are relevent to fog modification problems.
Rogers, C. W.↗
Initial basalt target site selection evaluation for the Mars penetrator drop test
Potential basalt target sites for an air drop penetrator test were described and the criteria involved in site selection were discussed. A summary of the background field geology and recommendations for optimum sites are also presented.
Bunch, T. E.↗
Drop dynamics in space
Drop experiments proposed for Spacelab are discussed and an acoustic chamber utilizing the torques and forces produced by acoustic waves excited within the chamber is described. Its operation and how it is being tested for experiments is discussed.
Wang, T. G.↗