电弧作用下浸铜碳材料烧蚀过程的数值模拟

doi:10.19595/j.cnki.1000-6753.tces.180113

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Abstract Arc erosion is one of the key factors that affect the service life of metal-impregnated carbon material. First, the arc was equivalent to a heat source of Gauss distribution. Based on the heat conduction theory, fluid dynamics, the temperature change of copper-impregnated carbon material and melting-solidification process of material phase transition were calculated. Then, the effects of liquid surface tension of molten pool on the temperature and velocity of copper-impregnated carbon material surface were analyzed. Finally, considering the evaporation and sublimation of copper-impregnated carbon material, the surface morphology and temperature distribution were solved. The simulation results show that the temperature of the copper-impregnated carbon material increases rapidly with arc, resulting in a pool domain formed by the phase transition. After the arc is extinguished, the pool area continues to expand for a period of time and then decreases gradually. The surface of molten pool dissipates heat faster than the interior. The surface tension of the liquid causes the flow of the melting pool surface, thereby accelerating the heat dissipation. Under the continuous action of arc, the surface of copper-impregnated carbon material gradually forms a molten pool and an ablation pit. The radius and depth of the molten pool increase linearly with time. The temperature of the ablation pit on the material surface is the highest, and its value fluctuates near the sublimation temperature of carbon.

Key words： Arc copper-impregnated carbon material phase transition liquid surface tension temperature distribution molten pool

Received: 21 January 2018 Published: 29 March 2019

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TM201.3

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	Wu Yuxin
	Wang Yangming
	Yang Zefeng
	Xu Pan
	Wu Guangning

Cite this article:

Wu Yuxin,Wang Yangming,Yang Zefeng等. Numerical Simulation of Ablation Process of Copper-Impregnated Carbon Material under Arc Action[J]. Transactions of China Electrotechnical Society, 2019, 34(6): 1119-1126.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180113 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I6/1119

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