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首页> 外文期刊>Physics of plasmas >Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar
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Numerical simulation of high-current vacuum arc characteristics under combined action of axial magnetic field and external magnetic field from bus bar

机译：汇流条轴向磁场与外部磁场共同作用下大电流真空电弧特性的数值模拟

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摘要

In this paper, the two-dimensional high-current vacuum arc (HCVA) model under the combined action of axial magnetic field (AMF) and external magnetic field from bus bar (EMFBB) is established. Based on this model, the influence of AMF and EMFBB on HCVA characteristics can be simulated and analyzed. Simulation results show that the HCVA column will be deflected by the Lorentz force generated by EMFBB and higher arc current. Moreover, the deflection level will be increased with the increase in external EMFBB strength. For HCVA, due to the smaller axial velocity near cathode side, the deflection of plasma parameters (such as ion number density, ion temperature, electron temperature, plasma pressure, and so on) near cathode side is more significant than that near anode side. The current deflection near cathode side toward direction of Lorentz force is more significant than that near anode side.
机译：本文建立了在轴向磁场（AMF）和汇流条外部磁场（EMFBB）共同作用下的二维高电流真空电弧（HCVA）模型。基于该模型，可以模拟和分析AMF和EMFBB对HCVA特性的影响。仿真结果表明，HCMF柱将被EMFBB产生的洛伦兹力和更高的电弧电流所偏转。而且，挠度会随着外部EMFBB强度的增加而增加。对于HCVA，由于靠近阴极侧的轴向速度较小，因此阴极附近的等离子体参数（例如离子数密度，离子温度，电子温度，等离子体压力等）的偏转比阳极附近的偏转更大。阴极侧附近向洛伦兹力方向的电流偏转比阳极侧附近的电流偏转大。

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