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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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Radial electron density profile and critical longitudinal magnetic field for helical current convective instability in hollow plasma column via Langmuir probe measurements
Velocity profiles of non-Newtonian fluid /polyisobutylene solution/ in helical flow by flow visualization technique, discussing Poiseville and viscometric flows
Isolation of closely spaced transmitting and receiving frequencies of an antenna without insertion loss by filtering the receiver input is accomplished by an inner conductor with two winding helices and an outer conductor of aluminum. A tuning slug is at either end of the inner conductor form.
End effect and pressure patterns in viscoseal with smooth rotor and stationary helically grooved housing
Helical groove viscosity seal using sodium and water as sealed fluids
Helical seal is used to seal bolted flange joints in a high temperature environment. The seal design incorporates a new cross-sectional shape, a metal strip with a slight radius, and the use of premolded asbestos. It provides equal load distribution under compression loads, allows for minimum loss and recovery values, and increases the temperature range.
Dielectric constant of plasma in direct pinch magnetic field and in direct helical magnetic field
Helical instability of positive column in crossed fields and in annular plasma configurations
Calculation of electron gun for producing helical electron beams with prescribed high transverse over longitudinal electron energy ratio
Systems design analysis of helically-wound magnetic tape and mechanical tape transport
FORTRAN subroutines for determining intersections of nuclear particle flight path and wall of helical tubular duct
Single tube-in-shell water-boiling heat exchanger performance with helical wire insert and flow stabilizing devices
Helical instability theory for positive hollow plasma column in magnetic field with shear
Radial profile of perturbation density at onset of helical instability in positive plasma column
Using a device that is not limited to a minimum thickness or width-to-thickness ratio, a very thin metal tape or ribbon is formed into a continuous flat wound helical coil. The device imparts the desired circular shape by squeeze rolling it with an unequal force across its width.
Radiation fields produced by energetic electrons in helical orbit within magnetoactive plasma derived by solving Maxwell equations
Pump and seal parameters for helical groove, hermetically sealed pump and bearing rotor