中文摘要：

绝缘子表面积污通常是大气环境中污秽颗粒运动导致,而大气污秽颗粒粒径普遍处于0.1-100μm之间,其中雾霾颗粒的粒径通常〈10μm。首先利用流体力学软件FLUENT对具有双伞型结构的XWP2–70绝缘子表面的流场特性进行仿真,然后研究不同污秽颗粒粒径和不同风速下绝缘子表面污秽颗粒碰撞系数,同时利用建立的自然积污试验站对上述绝缘子进行了为期8个月的自然积污试验验证。研究表明：风速大小对绝缘子表面附近的气流场特性有影响;绝缘子表面的污秽颗粒碰撞系数P受到粒径和风速的综合影响。研究结果为建立雾霾环境下绝缘子积污模型提供了参考和借鉴,对输电线路外绝缘的选择和设计具有重要参考意义。

英文摘要：

The movement of pollution particles around insulator will cause the pollution deposit on insulator surface. Commonly the atmosphere particle size is 0.1-100 μm, while the size of haze particles is less than 10 μm. We adopted the software of FLUENT to simulate the characteristics of the air flow field of XWP2–70 insulators with double sheds, and studied the pollution particle collision coefficient of insulator surface under different particle diameters and wind velocities. At the same time, we carried out a natural pollution accumulation test which lasted for 8 months in the natural pollution deposition basement. Test results indicate that wind velocity affects air flow field near the surface of insulator, and the collision coefficient P of pollution particles of insulators is affected by haze particle diameters and wind velocity. The obtained results can provide references for establishing pollution deposition model under haze conditions, which is of great significance for the external insulation design and selection of transmission lines.