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为研究风对绝缘子积污特性的影响,该文利用直流风洞研究了风速和风向对瓷钟罩绝缘子和瓷双伞绝缘子积污特性的影响,并利用Fluent软件建立了绝缘子三维CFD仿真模型,对其周围的空气流场特性进行了分析.结果表明:空气流场对绝缘子积污状况的影响主要表现在风速和风向两个方面,风速和风向对绝缘子上下表面积污量和积污分布均有影响,风速在2.2～4.5 m/s之间时,绝缘子的上下表面污秽度是逐渐增大的,在风速4.5m/s附近的时候达到峰值.随着风速的继续增大,绝缘子表面的污秽度呈下降趋势,当风速大于6.0m/s左右时,绝缘子上下表面污秽度下降趋于平缓;不同风向对下表面有环形伞棱的绝缘子影响较小,对下表面无伞棱结构的绝缘子影响较大.该文研究成果可为污秽外绝缘的设计优化提供理论依据和数据支持.“,”In order to study the influence of a wind field on the pollution accumulation of insulators,an artificial contamination test system used to simulate the natural weather condition was built up.The influences of wind speed and wind direction on the contamination depositing characteristics of common shed porcelain insulators and dual-umbrella insulators were studied.The test results suggest that the influences of air flow field on the pollution accumulation of insulators mainly include two aspects of wind speed and wind direction.They both affect appreciably the quantity and distribution of the pollution on the top and bottom surfaces of the insulators,but wind speed plays a more important role in determining the quantity of pollution deposit and wind direction primarily affects the distribution.When wind speed is between 2.2rn/s and 4.5m/s,the contamination degree of the top and bottom surface of the insulator increases gradually with the wind speed,and the peak value reaches maximum when the wind velocity is up to 4.5m/s.With further increase of wind speed,the surface of the insulator contamination degree decreased,when wind speed is greater than 6.0 m/s,insulator surface contamination degree decline tends to be gentle.The difference of the wind direction has little influence on the insulator with circular umbrella edge structure on the bottom surface,but has a great influence on the insulators without circular umbrella edge structure on the bottom surface.The work described in this paper may provide some theoretical references and data support to the optimization design of extemal insulation.