Transient ablation regime in circuit breakers

Alexandre Martin, Jean Yves Trepanier, Marcelo Reggio, Xueyan Guo

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


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 litterature 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.

Original languageEnglish
Pages (from-to)653-656
Number of pages4
JournalPlasma Science and Technology
Issue number6
StatePublished - Dec 1 2007

ASJC Scopus subject areas

  • Condensed Matter Physics


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