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|Type:||Artigo de periódico|
|Title:||Peculiarity of current-voltage characteristics of transferred arc burning in a limited volume|
|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|
|Editor:||Taylor & Francis Ltd|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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