摘要：为研究绝缘子表面灰尘颗粒径分布状态，以ZS(W)35KV/6-8瓷棒形支柱绝缘子为研究对象，利用DEMCFD耦合方法模拟绝缘子表面动态积污过程，使用离散元方法综合分析绝缘子在积污过程中各个表面灰尘颗粒的分布情况。结果表明：灰尘颗粒主要集中在绝缘子迎风面，背风面较少，颗粒主要分布在伞裙的上表面、伞棒、下表面凹陷区3个部位，同时绝缘子表面积污颗粒数随时间的延长而增加，积污速率基本保持不变；同尺寸的绝缘子，下表面有凸棱的积污颗粒更多，凸棱会增大绝缘子的表面积和流场扰动，容易积污。

关键词：瓷棒形支柱绝缘子；DEM-CFD耦合方法；动态积污；颗粒分布

Abstract: In order to study the particle size distribution of the dust particles on the insulator surface，the ZS ( W)－35KV/ 6－8 insulator was used as the object of study．The DEM－CFD coupling method was used to simulate the dynamic fouling process of the insulator surface．The discrete element method was used to analyze the insulator distribution of dust particles on each surface of the process．The results show that the accumulation of insulator on the windward side is more serious than that of the leeward．The plot is mainly concentrated in the three parts of the surface and the umbrella transition area ( umbrella rod) and the depression area of the lower surface of the umbrella skirt．The number of dirt particles sticking on insulator surface also increases with the extension of time，but the sticking rate remains unchanged basically．For different size of insulators，there is more dust particles sticking on insulator surface that has bead at lower surface，the bead can increase the surface area and increase the disturbance of the fluid，it is more available for deposition of the dust particles． 

Keywords: solid core post insulator; DEM－CFD methods; dynamic contamination; particle distribution