Modeling of Cathode Spot Crater in Vacuum Arc

被引：0

作者：

Zhang, Xiao ^{[1
]}

Wang, Lijun ^{[1
]}

Jia, Shenli ^{[1
]}

Shmelev, D. L. ^{[2
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian, Shaanxi, Peoples R China

[2] RAS, Inst Electrophys, Ekaterinburg 620016, Russia

来源：

2017 4TH INTERNATIONAL CONFERENCE ON ELECTRIC POWER EQUIPMENT-SWITCHING TECHNOLOGY (ICEPE-ST) | 2017年

基金：

中国国家自然科学基金;

关键词：

vacuum arc; cathode spot; cathode crater; spot parameter; liquid metal;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A two-dimensional (2D) rotary axisymmetric model has been developed to describe the formation and development of cathode spot in vacuum arc. The model includes hydrodynamic equations and thermal conductivity equation. Parameters used in this model come from experiments and other researchers' work. The simulation results show that when the energy flux density is 1.5 similar to 3x10(12)W, discharge current is 1 similar to 6A and the pressure is 1 similar to 3x10(8)Pa, the crater radius is 1.4 similar to 4.1 mu m, the crater depth is 1.4 similar to 2.1 mu m, the velocity of liquid metal is 154 similar to 428m/s and the maximum temperature is 2145 similar to 5342K which is located in the area with radius 0.5 similar to 1.5 mu m. Besides, on the chromium cathode, the maximum temperature is higher mainly because of the lower thermal conductivity.

引用

页码：586 / 589

页数：4

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