空气间隙击穿后放电通道内的气体运动特性

doi:10.19595/j.cnki.1000-6753.tces.200779

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Abstract The movement of the gas in the discharge channel after the air gap breakdown is related to the recovery of the gap insulation strength, and the degree of recovery of the insulation strength has a decisive influence on the success of the reclosure after the transmission line is tripped due to the gap discharge. In this paper, high-speed schlieren technology was used to obtain the schlieren images of the discharge channel evolution process after the rod-to-plate air gap breakdown and the space-time distribution of the gas velocity field in the discharge channel after the gap breakdown was obtained based on the optical flow method. The results show that the average velocity of the gas movement in the discharge channel after the gap breakdown decays in a “double exponential” manner; the probability that the jet at the edge of the discharge channel develops into turbulence is small, and at the same time, the development of the jet makes the discharge channel first show the trend of ‘changing from bending to straightening' and then gradually becoming irregular; the gas movement direction in the discharge channel close to the rod electrode shows an opposite trend, which helps the discharge channel in the rod electrode area to recover firstly to the state before discharge.

Key words： Air gap breakdown Air gap breakdown discharge channel schlieren technology discharge channel optical flow method schlieren technology velocity field optical flow method velocity field

Received: 03 July 2020

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TM855

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	Articles by authors
	Dong Manling
	Liu Xiaopeng
	Dong Manling
	Deng Huwei
	Zhao Xiangen
	Deng Huwei
	He Junjia
	Zhao Xiangen
	He Junjia

Cite this article:

Dong Manling,Liu Xiaopeng,Dong Manling等. Movement Characteristics of the Gas in Discharge Channel after Air Gap Breakdown[J]. Transactions of China Electrotechnical Society, 2021, 36(13): 2667-2674.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200779 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I13/2667

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