车顶绝缘子空气动力结构优化及其积污特性研究  

Aerodynamic Structure Optimization and Contamination Accumulation Characteristics of Roof Insulator

作　　者：陈然 郭裕钧 张血琴 吴广宁[1] 李沛东 CHEN Ran;GUO Yujun;ZHANG Xueqin;WU Guangning;LI Peidong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,成都611756

出　　处：《电瓷避雷器》2023年第2期164-171,共8页Insulators and Surge Arresters

基　　金：国家自然科学基金项目(编号:51907168);四川省杰出青年科技人才项目资助(编号:2020JDJQ0039)。

摘　　要：为了提高高速列车运行安全稳定性,防止车顶绝缘子在雾霾天气下发生污闪,对污秽颗粒在绝缘子表面的沉积过程进行受力分析,根据受力分析结果对车顶绝缘子进行结构优化,提出两种空气动力结构绝缘子,并对优化结构进行流体力学仿真与风洞积污试验。结果表明:相比于传统结构绝缘子,空气动力结构绝缘子绕流速度大幅度提升,背风面流线有序不存在逆流现象,边界层分离点延后,旋涡运动大幅度减弱,气流分布状况得到了良好改善。空气动力型绝缘子的背风面积污量大幅减小,表面整体积污量小于传统结构绝缘子,积污更容易达到饱和,且污秽分布更加均匀。In order to improve the safety of high-speed trains and prevent the roof insulator from pollu-tion flashover in haze weather,conduct force analysis on the dirt particles on the surface of the insulator,optimize the structure of the roof insulators according to the force analysis results,and propose two types of aerodynamic structural insulators.Fluid mechanics simulation and wind tunnel test are carried out on the optimized structure.The results show that:compared with traditional structural insulators,the flow speed around aerodynamic structural insulators is greatly improved.The streamlines on the leeward side are orderly,and there is no backflow phenomenon.The boundary layer separation point is delayed.The vortex motion is greatly weakened,and the airflow distribution is well improved.The pollution of the lee-ward area of the aerodynamic insulator is greatly reduced,the total dirt accumulation on the surface is less than that of traditional structural insulators,the contamination is easier to reach saturation,and the contamination is more evenly distributed.

关 键 词：雾霾 车顶绝缘子 结构优化 污秽 

分 类 号：TM216[一般工业技术—材料科学与工程] U225.43[电气工程—电工理论与新技术]