Accession Number : AD0650270

Title :   INTERACTIONS OF FREE-BURNING ARCS WITH TRANSVERSE GAS FLOWS AND MAGNETIC FIELDS.

Descriptive Note : Interim scientific summary rept., 1 Dec 65-30 Nov 66,

Corporate Author : TECHNISCHE HOCHSCHULE AACHEN (WEST GERMANY)

Personal Author(s) : Fucks,W. ; Fischer,E. ; Uhlenbusch,J.

Report Date : DEC 1966

Pagination or Media Count : 49

Abstract : Interactions between a free burning arc and transverse gas flows without and with magnetic fields perpendicular to the arc axis are studied. For simplification the arc plasma is described by the mono-fluid-approximation, laminar flow is assumed and the problem is reduced to two dimensions. The latter is approximately correct near the symmetry-plane between the electrodes of a very long free burning arc. Analytical and numerical methods are developed to calculate the flow for a given reasonable temperature field and the temperature distribution for a given flow field. For a given approximate temperature distribution the momentum equation is solved including inertial forces, viscous forces and Lorentz forces. An analytic solution for a channel model is compared with the more rigorous numerical calculations. It is shown that strong magnetic fields or inertial forces can cause a back-flow in the arc core. A better approximation of the temperature field is found by solving the energy equation for a given inhomogeneous flow field. The solution leads to an eigenvalue problem, which allows besides the calculation of the temperature distribution a determination of the electric field strength in the arc depending on the flow parameters.

Descriptors :   (*GAS FLOW, *MAGNETIC FIELDS), (*LAMINAR FLOW, INTERACTIONS), ELECTRODES, ELECTRIC FIELDS, FLOW FIELDS, ELECTRIC ARCS, PLASMAS(PHYSICS)

Subject Categories : Electricity and Magnetism
      Fluid Mechanics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE