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Unsteady state analysis of free-burning arcs in a 3-Phase AC plasma torch: comparison between parallel and coplanar electrode configurations

Abstract : An MHD model with parallel electrode configuration was developed to determine the influence of the electrode configuration on 3-Phase arc discharge behavior. The results obtained with this model were compared to previous results obtained with coplanar graphite electrode configuration. Results show a different arc behavior in both cases. In a parallel electrode configuration, the arcs are not confined within the inter-electrode gap as in coplanar electrode configuration. These results were compared to the arc behavior observed with a high-speed video-camera in a nitrogen atmosphere with a high correlation. The influence of frequency and current was also investigated. By adjusting the electrode configuration, the arc elongation and the dissipated power could be controlled. According to the application, such as plasma-assisted combustion, plasma gasification, plasma spray or for different plasma gases, the electrode configuration could play a key role to improve the discharge or operation. This study gives us a better understanding of 3-Phase AC arc plasma discharge.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01086921
Contributor : Magalie Prudon <>
Submitted on : Tuesday, November 25, 2014 - 11:05:26 AM
Last modification on : Wednesday, October 14, 2020 - 4:01:53 AM

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Christophe Rehmet, Frédéric Fabry, Vandad-Julien Rohani, François Cauneau, Laurent Fulcheri. Unsteady state analysis of free-burning arcs in a 3-Phase AC plasma torch: comparison between parallel and coplanar electrode configurations. Plasma Sources Science and Technology, IOP Publishing, 2014, 23 (6), pp.article 065011. ⟨10.1088/0963-0252/23/6/065011⟩. ⟨hal-01086921⟩

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