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Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

Effect of discharge conditions on dominant heat transfer processes in magnetically driven electric arc

Oleg J. Yas' ko
Heat & Mass Transfer Institute, Academy of Sciences of Belarus

A. M. Esipchuk
Heat & Mass Transfer Institute, Academy of Sciences of Belarus; Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, Unicamp, 13083-970, Campinas, Sao Paulo, Brazil

L.P. Podenok
Heat & Mass Transfer Institute, Academy of Sciences of Belarus. 15 P. Browky St.220072 Minsk, Belarus

N. I. Chubrik
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost Ave., Minsk, 220072, Belarus

Abstract

Magnetically driven arcs in air moving between parallel rail electrodes and rotating in annulus are considered. Effect of the interelektrode gap size and magnetic field induction on current-voltage characteristics is investigated by sequential selection of dominant similarity numbers. Convective heat transfer is shown to be dominant at low gaps and magnetic induction, but the role of turbulent transfer becomes more important with gap and magnetic field rise.