Transient Ablation Regime in Circuit Breakers
Transient Ablation Regime in Circuit Breakers作者机构：Ecole PolytechniqueMontrealQuebecCanada
出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)
年 卷 期：2007年第9卷第6期
页 面：653-656页
核心收录：
学科分类：08[工学] 0801[工学-力学（可授工学、理学学位）]
主 题：circuit breakers electric arc ablation Teflon radiation
摘 要：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.
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