大电流真空电弧作用下阳极表面侵蚀的模拟

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI:10.1109/DEIV.2016.7748744

Yunbo Tian, Zhenxing Wang, Yanjun Jiang, Hui Ma, Zhiyuan Liu, Yingsan Geng, Jianhua Wang

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引用次数: 1

摘要

阳极熔蚀过程对大电流真空电弧的中断有重要影响。本文的目的是从理论上研究真空电弧加热和电弧压力吹蚀效应共同作用下阳极表面侵蚀的机理。建立了真空断流器大电流断流过程中阳极区的流体流动和传热模型。结果表明，在电弧加热和电弧压力的共同作用下，电弧电流峰值为20 kA时，阳极表面出现了明显的侵蚀现象。电弧形成5ms后，液态金属开始流动，最大速度为0.95 m/s。这种由电弧等离子体驱动的阳极表面液态金属流动可以重新分配熔融液态金属的热能。因此，阳极表面的最高温度并没有停留在阳极表面的中心。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Simulation of surface erosion of anode under high-current vacuum arcs

The anode melting and erosion process has a significant effect on the interruption of a high-current vacuum arc. The objective of this paper is to theoretically investigate the mechanism of anode surface erosion caused by a combined effect of vacuum arc heating and the blow effect of arc pressure. A model of fluid flow and heat transfer of an anode region in a vacuum interrupter's high-current interruption process is developed. The results show that, under the combined effect of arc heating and arc pressure, an obvious erosion on anode surfaces was seen for peak arcing current of 20 kA. The flow of liquid metal started after 5 ms of arcing, the maximum velocity was 0.95 m/s. This flow of liquid metal on anode surfaces driven by arc plasma may redistribute the thermal energy of molten liquid metal. As a result, the maximum temperature of an anode surface did not stay in the center of an anode surface.

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2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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