Accession Number : AD0658050

Title :   ARC STRUCTURE IN A MAGNETIC ANNULAR DISCHARGE.

Descriptive Note : Research rept.,

Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS

Personal Author(s) : Workman,J. B.

Report Date : JUN 1967

Pagination or Media Count : 51

Abstract : The structure of an arc in a magnetic annular discharge in hydrogen was computed numerically using non-equilibrium, quasi-one dimensional multicomponent hydrodynamics. The analysis substantiates recent experimental observations of a narrow current and ionization zone near the throat that is distinct from the complicated flow in the supersonic expansion. The numerical results suggest a simple diffusion and heating model for the subsonic portion of the arc. This model gives the important physical processes and permits the development of elementary relations which are useful for estimating parametric behavior. Specifically, formulas are derived giving the scale length of the discharge, fraction ionized, and the relationship between electrical power and flow parameters. Certain constants that are needed by the simple model are deduced by matching the results to the numerical analysis. (Author)

Descriptors :   (*MAGNETOHYDRODYNAMICS, *GAS DISCHARGES), ELECTRIC ARCS, MAGNETIC FIELDS, PLASMA ACCELERATORS, NUMERICAL ANALYSIS, HYDROGEN, DIFFUSION

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE