Accession Number : ADA195606

Title :   Theoretical Modeling of Accelerating Arc Plasmas

Descriptive Note : Final rept. 31 Jul 1984-31 Jul 1987

Corporate Author : MIAMI UNIV CORAL GABLES FL

Personal Author(s) : Huerta, Manuel A

PDF Url : ADA195606

Report Date : 22 Apr 1988

Pagination or Media Count : 33

Abstract : The researchers present a calculation in a simplified geometry for the current distribution in the rails, taking into account the motion of the armature and the time variation of the current. Closed form, asymptotic, results for the current density are obtained for arbitrary time dependent electrical conductivity of the rails, and v is the speed of the armature. Because of eddy current effects the rail current may reverse in portions of the rails when the total current decreases. The current is used as a source of Joule heating to find the temperature distribution in the rails. The heat diffusivity is negligible and give numerical results concerning melting.

Descriptors :   *ARC HEATING, *HYPERVELOCITY GUNS, *PLASMA ACCELERATORS, ARMATURES, CURRENT DENSITY, DIFFUSIVITY, DISTRIBUTION, EDDY CURRENTS, ELECTRICAL CONDUCTIVITY, GEOMETRY, HEAT, HEATING, MAGNETOHYDRODYNAMICS, MODELS, MOTION, NUMERICAL ANALYSIS, PLASMAS(PHYSICS), RAILS, SIMPLIFICATION, SOURCES, TEMPERATURE, THEORY, TIME, TIME DEPENDENCE, VARIATIONS, VELOCITY

Subject Categories : Guns
      Electricity and Magnetism
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE