%0 Journal Article
%T 沙尘环境下绝缘子表面颗粒积聚特性研究<br>Research on characteristics of particulate accumulation of insulators with sheds under sandstorm environment
%A 张友鹏
%A 陈广思&lt
%A br&gt
%A ZHANG Youpeng
%A CHEN Guangsi
%J 铁道科学与工程学报
%D 2018
%X 为研究沙尘环境下绝缘子表面颗粒积聚特性，基于流体力学和电场分布理论建立多物理场共同作用下的风洞仿真模型，应用有限元法分析计算绝缘子表面颗粒在不同沙尘环境下的绝缘子表面压强和沙尘积聚量。研究结果表明：风速、电势和沙尘粒径均与绝缘子表面颗粒积聚特性有关，风速、电势和沙尘粒径3个变量中任意一个增加，沙尘颗粒碰撞迎风面和背风面产生的压强均会增加且迎风面压强比背风面高；沙尘积聚量随风速增加而快速增加且积聚速度逐渐减缓并趋于平稳，随电势增加而增加且积聚速度比较缓慢，随沙尘粒径增加而缓慢增加并逐渐趋于饱和且积聚速度逐渐减缓。仿真结果与试验结果基本相符。<br>In order to study particulate accumulation characteristics of insulator with sheds under sandstorm environment, the wind tunnel simulation model of multiple physical fields was established based on the theory of fluid mechanics and electric field. The finite element method was utilized to analyze insulator sheds pressure and particulate accumulation amount in different sandstorm environments. The results show that wind speed, electrical potential and particle size are related to particulate accumulation characteristics of the insulator. When any of wind speed, electrical potential and particle size increases, particles collide will increase the pressure on the windward and leeward sheds, and windard pressure is higher than the leeward pressure. The amount of particulate accumulation increases rapidly with the increase of wind speed and the accumulation rate gradually slows down and stabilizes. More specifically, with the increase of electric potential, the accumulation amount increases rapidly while the speed of accumulation slows down and gradually stabilizes; with the increase of particle size, the accumulation amount slowly increases and tends to be saturated. The simulation results agree well with the experimental results
%K 沙尘环境
%K 绝缘子
%K 颗粒积聚特性
%K 多物理场
%K 有限元法&lt
%K br&gt
%K sandstorm environment
%K insulator
%K particulate accumulation characteristics
%K multiple physical fields
%K finite element method
%U http://www.jrse.cn/paper/paperView.aspx?id=paper_318336