Plasma Investigations

Study of heat transfer processes in a three-phase, single-chamber plasma torch with end electrodes

A. A. Safronov, V. B. Kovshechnikov, O. B. Vasil'eva, Yu. D. Dudnik, V. E. Kuznetsov, V. N. Shiryaev

Institute of Problems of Electrophysics of the Russian Academy of Sciences, St. Petersburg

Abstract: The paper presents the results of a study of the effect of the flow rate and pressure of a plasma-forming gas (nitrogen) on energy losses in the form of radiation in the chamber of a three-phase plasma torch with refractory electrodes. An increase in energy losses due to radiation over the entire spectral region with increasing pressure is shown. The dependences of the current-voltage characteristics of the discharge, the fraction of radiant losses, and the efficiency of the plasma torch on the nitrogen flow rate and pressure in the chamber are given.

UDC: 533.9...15

Received: 11.02.2019
Revised: 16.05.2019
Accepted: 20.05.2019

DOI: 10.1134/S0040364419060139

 English version: High Temperature, 2019, 57:6, 808–812

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