Artículos de revistas
Peculiarity of current-voltage characteristics of transferred arc burning in a limited volume
Registro en:
Plasma Devices And Operations. Taylor & Francis Ltd, v. 17, n. 1, n. 23, n. 31, 2009.
1051-9998
WOS:000263648600004
10.1080/10519990802677679
Autor
Essiptchouk, AM
Sharakhovsky, LI
Marotta, A
Institución
Resumen
Current-voltage characteristics (CVCs) of a transferred arc in a limited volume are reported. Experiments were carried out with a setup developed to reproduce the conditions which occur in a tundish equipped with a plasma system to keep the steel temperature at a predefined level. The experimental setup consists of a test chamber in which a plasma torch with a transferred arc is inserted on the top of the chamber cover and the anode is attached at the bottom. A 'hysteresis' of the CVC curves was observed during an increase and a decrease in the arc current. This phenomenon is explained by a long-lived ring-shaped vortex flow in the chamber, which is powered by the [image omitted] forces that at high currents act as an electromagnetic pump accelerating plasma in the direction of current expansion. 17 1 23 31