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Progress in Plasma Processing of Materials, 1997

ISBN Imprimir: 1-56700-093-2

FLOW MODELLING AND GAS HEATING INSIDE A PROFILING CHANNEL OF AN ELECTRIC ARC PLASMA TORCH

Resumo

This paper presents a theoretical model for the numerical analysis of the acceleration and heating of a gas by an electric arc in a profiling channel with a diffusor anode. The thermal parameters and transport coefficients of helium have been determinated and the approximative expression for their calculation in a broad range of temperature (0,3-100) kK and pressures have been proposed. The calculation and investigation of the effect of the thermal non-equilibrium plasma on the characteristics of the cylindrical arc have been carried out. The results of the calculations have been compared with experimental data and calculations obtained on the basis of an equilibrium plasma model.
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