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Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

Voltage-current characteristics of plasmatron with expanding channel

P.P. Ivanov
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

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

A.S. Tyuftyaev
Science and Technological Center of Associated Institute of High Temperature Russian Academy of Science - 13/19 Izhorskya St, Moscow, 127 412 - Russia

Abstract

Using the purpose-developed quasi-onedimensional Delphi code for the flow in the plasmatron with axial symmetry, calculations of voltage-current characteristics for plasmatrons with channel expansion angle from 0 to 180 are performed. The behavior of the Mach number under different values of current and expansion angles are investigated. The plasmatron with expanding channel differs by the relatively low level of the pressure and by the higher values of the current, when the critical condition is reached.