
Accession Number : AD0650270
Title : INTERACTIONS OF FREEBURNING ARCS WITH TRANSVERSE GAS FLOWS AND MAGNETIC FIELDS.
Descriptive Note : Interim scientific summary rept., 1 Dec 6530 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 monofluidapproximation, laminar flow is assumed and the problem is reduced to two dimensions. The latter is approximately correct near the symmetryplane 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 backflow 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