高速气流条件下污秽颗粒在复合绝缘子表面的沉积判据

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Abstract The studies of insulators contamination under high speed aerosol condition make great contributions to the cleaning and prevention of pollution flashover under the condition of sandstorm or high speed operation of electric multiple units(EMUs).The deposit criterion of contamination particles on the surface of composite insulators is proposed in this paper.Then the computational fluid mechanics (CFD) model of composite insulators contamination under high speed aerosol condition is established.The validities of the deposit criterion and the CFD model are verified in the pollution particle distribution character perspective by the experiments results and the references which gave an exponential analysis of the insulators with high voltage isolating switch in EMUs.The simulation analyzes the composite insulator contamination under different particle sizes and indicates that particle size has an obvious influence on the insulator contamination.When the particle size is small,eddy collision is the main way of collision between contamination particulates and insulators.So the collision and deposition may occur on windward and leeward sides.When the size is larger,the inertial impaction is the main mode.Therefore,the collision and deposition only occur on the windward side.When the size is large enough to a certain extent,the deposition will never occur on both windward and leeward sides.

Key words： High speed aerosol composite insulators contamination deposit criterion computational fluid mechanics (CFD) model

Received: 24 July 2015 Published: 19 January 2017

PACS:

TM216

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	Lü Fangcheng
	Liu Hongyu
	Wang Fochi
	Yang Shengjie
	Ma Jianqiao

Cite this article:

Lü Fangcheng,Liu Hongyu,Wang Fochi等. Deposit Criterion of Pollution Particles on Composite Insulators Surface under High Speed Aerosol[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 206-213.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I1/206

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