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Article
Transient Ablation Regime in Circuit Breakers
Plasma Science and Technology (2007)
  • Alexandre Martin
  • Jean-Yves Trepanier
  • Marcelo Reggio
  • Xueyan Guo
Abstract

Nozzle wall ablation caused by high temperature electric arcs is studied in the context of high voltage SF6 circuit breakers. The simplified ablation model used in literature has been updated to take into account the unsteady state of ablation. Ablation rate and velocity are now calculated by a kinetic model using two layers of transition, between the bulk plasma and the ablating wall. The first layer (Knudsen layer), right by the wall, is a kinetic layer of a few mean-free path of thickness. The second layer is collision dominated and makes the transition between the kinetic layer and the plasma bulk. With this new coupled algorithm, it is now possible to calculate the temperature distribution inside the wall, as well as more accurate ablation rates.

Keywords
  • Transient Ablation Regime,
  • Circuit Breakers
Publication Date
December, 2007
Citation Information
Alexandre Martin, Jean-Yves Trepanier, Marcelo Reggio and Xueyan Guo. "Transient Ablation Regime in Circuit Breakers" Plasma Science and Technology Vol. 9 Iss. 6 (2007)
Available at: http://works.bepress.com/alexandre_martin/3/