New perspectives on the dynamics of AC and DC plasma arcs exposed to cross-fields

Youssef Abdo; Vandad-Julien Rohani; François Cauneau; Laurent Fulcheri

New perspectives on the dynamics of AC and DC plasma arcs exposed to cross-fields

Youssef Abdo ^{1, *} Vandad-Julien Rohani ¹ François Cauneau ¹ Laurent Fulcheri ¹

* Auteur correspondant

1 PERSEE - Centre Procédés, Énergies Renouvelables, Systèmes Énergétiques

Abstract : Interactions between an arc and external fields are crucially important for the design and the optimization of modern plasma torches. Multiple studies have been conducted to help better understand the behavior of DC and AC current arcs exposed to external and 'self-induced' magnetic fields, but the theoretical foundations remain very poorly explored. An analytical investigation has therefore been carried out in order to study the general behavior of DC and AC arcs under the effect of random cross-fields. A simple differential equation describing the general behavior of a planar DC or AC arc has been obtained. Several dimensionless numbers that depend primarily on arc and field parameters and the main arc characteristics (temperature, electric field strength) have also been determined. Their magnitude indicates the general tendency pattern of the arc evolution. The analytical results for many case studies have been validated using an MHD numerical model. The main purpose of this investigation was deriving a practical analytical model for the electric arc, rendering possible its stabilization and control, and the enhancement of the plasma torch power.

Keywords : plasma physics plasma torch arc stabilization cross-fields AC and DC arcs

Type de document :

Article dans une revue

Domaine :

Sciences de l'ingénieur [physics] / Energétique

Liste complète des métadonnées

https://hal-mines-paristech.archives-ouvertes.fr/hal-01440832
Contributeur : Magalie Prudon <>
Soumis le : jeudi 19 janvier 2017 - 14:50:22
Dernière modification le : lundi 12 novembre 2018 - 10:59:49

New perspectives on the dynamics of AC and DC plasma arcs exposed to cross-fields

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New perspectives on the dynamics of AC and DC plasma arcs exposed to cross-fields

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