EVAPORATION DOMINATED HIGH-CURRENT ARCS IN NARROW CHANNELS

被引:76
作者
NIEMEYER, L
机构
[1] Brown Boveri Research Center, Baden
来源
IEEE TRANSACTIONS ON POWER APPARATUS AND SYSTEMS | 1978年 / 97卷 / 03期
关键词
D O I
10.1109/TPAS.1978.354568
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
High current density (> 10 A mm−2) arcs in channels of solid material are determined by (i) arc induced evaporation of wall material, (ii) axial convection, and (iii) radiative energy transfer. Based on these processes, an integral arc model is developed from first principles that relates the arc characteristics to the arc current, the channel geometry, and the properties of the channel material. The model is shown to agree satisfactorily with measurements. For engineering applications approximate scaling laws are derived for the arc field strength, the pressure in the channel and the wall evaporation rate. Copyright. © 1978 by The Institute of Electrical and Electronics Engineers, Inc.
引用
收藏
页码:950 / 958
页数:9
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