计算流体力学在绝缘子积污特性分析中的应用  

Application of Computational Fluid Dynamics to Analysis of Contamination Depositing Characteristics of Insulators

作　　者：蒋兴良[1] 李海波[1] 

机构地区：[1]重庆大学输配电装备及国家系统安全与新技术国家重点实验室,重庆400044

出　　处：《高电压技术》2010年第2期329-334,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724503);国家"十一五"科技支撑计划重大项目(2006BAA02A19)~~

摘　　要：以XP-160线路绝缘子的积污特性为研究对象,利用计算流体力学方法,建立了求解线路绝缘子外部3维两相粘性不可压缩湍流流场的基本控制方程组,在得到了绝缘子外部流场的基础上分析了绝缘子的污秽颗粒碰撞系数(E)等撞击特性和空气来流速度(v)、污秽颗粒直径(dp)、气流风向倾角等对污秽撞击绝缘子特性的影响。结果表明:水平风向下,绝缘子上表面污秽颗粒碰撞系数随颗粒粒径或者风速的增大而增大,相对于绝缘子上表面,绝缘子下表面碰撞系数很小;非水平风向下,绝缘子上表面碰撞系数随自然风倾角的增大而减小,而绝缘子下表面则相反,且在易产生非水平气流的丘陵地区,XP-160绝缘子下表面污秽碰撞系数远远大于平原地区绝缘子。The contamination depositing characteristics of XP-160 suspension insulators determined by the method of computational fluid dynamics were analyzed,and a numerical model which could be used to analyze three-dimensional two-phase compressible turbulent flow-field around suspension insulator was established.On the basis of flow-field around insulators,the collision coefficient of contamination particles were calculated.In addition,the effects of free stream velocity（v）,diameter of particles（dp）,angle of the free stream on contamination depositing characteristics were investigated.It is found that the collision coefficient（E） of top surface increases with increasing of v and dp under the horizontal free stream.Compared with top surface of insulators,the collision coefficient of bottom surface is little.And under the non-horizontal free stream the collision coefficient（E） of top surface decreases with increasing of v and dp,which is on the contrary with the bottom surface.The results show that the collision coefficient of bottom surface of XP-160 insulators in hilly region is much more than that in fate area.

关 键 词：线路绝缘子 湍流 雷诺数 积污特性 碰撞系数 计算流体力学 

分 类 号：TM216[一般工业技术—材料科学与工程]