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Type: Artigo de periódico
Title: Peculiarity of current-voltage characteristics of transferred arc burning in a limited volume
Author: Essiptchouk, AM
Sharakhovsky, LI
Marotta, A
Abstract: 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.
Subject: transferred electric arcs
current-voltage characteristics
Maecker effect
Country: Inglaterra
Editor: Taylor & Francis Ltd
Rights: fechado
Identifier DOI: 10.1080/10519990802677679
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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