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Progress in Plasma Processing of Materials, 2001

ISBN:
1-56700-165-3 (Print)

NUMERICAL EXPERIMENTS OF VORTEX LAMINAR FLOWS IN PLASMATRONS

Oleg A. Sinkevich
Science Technological Center of Associated Institute for High Temperature, Russian Academy of Science and Moscow Power Engineering Institute (Technical University), Russia

S. E. Chikunov
Science Technological Center of Associated Institute for High Temperature, Russian Academy of Science and Moscow Power Engineering Institute (Technical University)

Vasilii V. Glazkov
Moscow Power Engineering Institute (Technical University), Russia

E. Kh. Isakaev
Science and Engineering Center for Energy-Efficient Processes and Equipment of Joint, Institute for High Temperatures of Russian Academy of Sciences Izhorskaya 13/19, Moscow, 127412, Russia

Abstract

Numerical simulation of the electrical arc, burning in the long cylindrical channel, is carried out. Assumptions of steady state, axisymmetry, local thermodynamic equilibrium and optically thin plasma are adopted in a two-dimensional MHD modeling of thermal plasma. A control volume method and the SIMPLE algorithm are used as the numerical scheme for solving the governing conservation equations of mass, momentum, energy, coupled with Maxwell's equations and the Ohm's law. Distributions of the temperature, the velocity, and the electrical field in plasmatrons are obtained. Calculations are carried out for the determination of the thermal stabilizing length, the dynamical stabilizing length, and the electrical stabilizing length. Dependencies of these stabilizing lengths on the gas flow rate, the electrical current, and the channel diameter are found.