高速气流环境中电气化铁路绝缘子表面积污分布特性  

Characteristics of Pollution Distribution on Insulators Nearby Electrified Railroad in High-speed Aerosol

作　　者：孙继星[1] 徐跃 胡学永 吴广宁[1] 高国强[1] 朱翊[3] 

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]青岛四方机车车辆股份有限公司,青岛266061 [3]中国电力科学研究院,北京100192

出　　处：《高电压技术》2014年第1期95-102,共8页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB711105-4);国家自然科学基金(51107104);国家自然科学基金重点项目(U1134205);青岛四方机车车辆公分有限公司科技项目(SFSY201163)~~

摘　　要：为实现电气化铁路的高速气流环境下绝缘子伞裙的优化及安装设计,分析了高速气流中污秽颗粒的运动及受力,根据聚团流化理论讨论了绝缘子表面污秽受力后粘附与分离状况,并建立高速风洞系统进行了试验分析。试验结果表明:绝缘子迎风面与背风面积污量随风速的升高逐渐增大并趋近于定值,该定值随着来流角度θ的增大先增大后减小;当θ<30°时,绝缘子侧风面积污随着风速的增加有明显的减小趋势,当θ>60°时,则呈明显的增长趋势;迎风面、背风面与侧风面相比,积污量有明显的差异。θ=0°及θ=90°时的仿真结果与试验结果相符合,可见用聚团流化模型分析绝缘子表面积污分布情况具有一定的参考价值。For the design and optimization of insulator skirts located nearby electric railways in high-speed airflow, we analyzed the pollution particles＇ movement and force pattern in high-speed airflow, discussed these particle＇s adherence to and departure from insulator surfaces by using the cohesive particles fluidizing theory, and put forward experiments in a fluid tunnel. The experimental results show that there is more pollution at windward side and leeside than at other sides, and the pollution increases with wind speed while tending to a constant. When the wind coming angle 0 increases from 0° to 90°, this constant increases firstly and then decreases. With increasing wind speed, the pollution at crosswind side de- creases obviously when 0 is less than 30°, but it increases when 0 is more than 60°. Under both θ=-0°and θ=°θ=90°, the theoretical analysis agrees well with the experiments, so analyzing pollution on insulator surface with cohesive particles fluidizin model is auite aDnlicable.

关 键 词：高速气流 电气化铁路 绝缘子 污秽 伞裙 来流角度 

分 类 号：TM216[一般工业技术—材料科学与工程]