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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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Rarefied gas dynamics - techniques for local charged particle density and temperature measurement in flowing plasma streams
Temperature probe used in a high temperature, high velocity gas stream consists of cooled outer shell and a cooled platinum sensing tube with iron constantan thermocouples.
Effect of plasma compressibility and sheath upon scattering cross section of electromagnetic waves from infinite perfectly conducting cylinder
Numerical analysis of surface currents and near fields of infinite cylindrical dipole antennas excited at circumferential gaps of non-zero thickness in a lossy plasma medium
Three fluid model for wave equations for disturbances due to current or hydrodynamic force sources in plasmas
Transverse electromagnetic plane wave scattering from perfectly conducting cylinder in warm compressible plasma, noting primary and conversion cross sections, electrokinetics and coupling coefficients
Visible and infrared transmitting properties of epoxy resin suitable for infrared detectors
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By building a floating isolator box of cork around the test object and using a low frequency transducer, automated conventional C scan equipment is adapted to inspect the object ultrasonically. Vibrations are isolated and reflected noise is reduced.
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An equation representing man's thermal balance under water is considered. The equation states that the body thermal loading from metabolic heat production and artificial heat input must be offset by respiratory and environmental heat exchange to maintain a constant body temperature. Critical body regions are affected by cold-water thermal stress. A model of the thermoregulatory system may be divided into the physical-controlled system and the dynamic controlling system. The thermal model is simulated by computer programs.
The refinement was investigated of a method for evaluating the pressure distribution on a body surface of arbitrary shape in incompressible flow. The solution was obtained in terms of the velocity potential, through numerical approximations which require the use of a high speed digital computer. The box method and the modal method are described in detail, and were applied to a very thin, rectangular wing in incompressible, steady flow. The box method is found to be more practical as it is applicable to more general geometries (the modal method requires a new set of functions for each geometry), and requires less computer time (fifty percent of that required by the modal method for the same problem).
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System using membraneous end wall of Bragg cell to separate test specimen from acoustic transmission medium, operates in real time and uses readily available optical components. System can be easily set up and maintained by people with little or no training in holography.