高电压技术2016，Vol.42Issue(3)：900-907,8.DOI:10.13336/j.1003-6520.hve.20160308024
空气动力型绝缘子表面不同区域的水滴撞击特性
Water Droplet Impingement Characteristics on Different Regions of Aerodynamic Insulator Surface
摘要
Abstract
Serious ice accretion on insulators may cause icing flashover and lead to power-off accident of grid.Researches on the flow field and trajectories of water droplet impinging on insulator surface are of great significance to understanding the icing mechanism of insulator.We chose the aerodynamic insulator as study object.On the basis of the Lagrange method, we proposed an area-divided method of calculating droplet collision efficiency after solving the flow field and droplet trajectories around insulator.Furthermore, we experimentally investigated the effects of wind velocity and median volumetric diameter(MVD) of water droplet on water droplets impingement characteristics.It is found that there is no remarkable difference (less than 3％) between the collision efficiency on the steel cap and shed edge of aerodynamic insulator.The collision efficiency on these two areas is far higher (60％～ 190％) than that of windward surface.The droplet collision efficiency on windward surface is almost twice as that on leeward surface of insulator.The collision efficiency increases with the increase of wind velocity and MVD, and the influencing degree of MVD on droplet collision efficiency is more remarkable than that of wind velocity.The insulator icing characteristics by analysis with area-divided method is more consistent with that from the experimental results.关键词
空气动力型绝缘子/覆冰/流场/水滴碰撞系数/水滴撞击特性/区域分割方式Key words
aerodynamic insulator/icing/flow field/collision coefficient of water droplets/impingement characteristics of water droplets/area-divided method引用本文复制引用
张志劲,郑强,蒋兴良,黄海舟..空气动力型绝缘子表面不同区域的水滴撞击特性[J].高电压技术,2016,42(3):900-907,8.基金项目
国家创新研究群体基金(51321063).Project supported by the Funds for Innovative Research Groups of China (51321063). （51321063）
