Abstract
Shunting is one of the basic processes which determine the properties of the arc and heated gas stream in a vortex plasmatron. Much attention has, therefore, been given recently to the character of the shunting mechanism and of the associated pulsations. The relationship between fluctuations of the flux brightness at the plasmatron outlet and the arc voltage is described in [1]. Paper [2] contains data on the effect of gas consumption and current on shunting frequency; it also shows the possibility of coexistence of several anode spots in an argon arc. The authors of [3] investigated the effect of electrode channel and electrode material polarities on arc voltage pulsations. In the present study we obtain voltage, current, and brightness distribution functions and reproduce oscillograms of these quantities and also of the current through the anode cross sections. We use various methods to prove the coexistence of several anode spots and discuss the effect of the intrinsic magnetic field of the arc on its behavior.
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