Accession Number : AD0721460

Title :   Electrical Characteristics and Transient Wave Growth in Magnetogasdynamic Channels.

Descriptive Note : Doctoral thesis,

Corporate Author : TENNESSEE UNIV SPACE INST TULLAHOMA

Personal Author(s) : Powers,Walter Lee

Report Date : 18 MAR 1967

Pagination or Media Count : 97

Abstract : A graphical display of the generalized Ohm's law is presented which is useful in determining the steady state electrical characteristics of magnetogasdynamic accelerators and generators. It is shown how this map aids in the selection of the most desirable type device for a given requirement. The electrical parameters of generators are written in terms of the external resistivity and permits the entire range from short to open circuit to be investigated. A first order perturbation analysis of the gas dynamic equations is made which permits an investigation of the initial growth of the transient acoustical response to natural disturbances which may disturb uniform flow conditions in generators. The cubic equation for the dispersion relation resulting from a quasi-one-dimensional plane wave traveling in the channel axial direction is solved numerically for all disturbance wavelengths and all external resistivities of interest in all generators. Results show that the upstream and enthalpy waves can grow considerably in typical channels. (Author)

Descriptors :   (*PLASMA ACCELERATORS, *MAGNETOHYDRODYNAMICS), (*MAGNETOHYDRODYNAMIC GENERATORS, ENERGY CONVERSION), OSCILLATION, PLASMAS(PHYSICS), ELECTRON DENSITY, HALL EFFECT, MAGNETIC FIELDS, PARTIAL DIFFERENTIAL EQUATIONS, DISPERSION RELATIONS, ELECTRICAL CONDUCTIVITY, MAGNETOOPTICS, GAS IONIZATION, COMPUTER PROGRAMS, THESES

Subject Categories : Electric Power Production and Distribution
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE