基于CFD的750kV变电构架单钢管避雷针结构绕流分析  

Analysis of Flow around Single Steel Pipe Lightning Rod of 750kV Substation based on CFD

作　　者：邵波 罗烈[1] 张广平 董昶宏 Shao Bo;Luo Lie;Zhang Guangping;Dong Changhong(College of Civil Engineering Tongji University Shanghai,200092,China;China Energy Construction Group Gansu Electric Power Design Institute Co. Ltd. Lanzhou,730050,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国能源建设集团甘肃省电力设计院有限公司,兰州730050

出　　处：《特种结构》2019年第5期88-96,共9页Special Structures

摘　　要：采用Fluent软件,对750kV变电构架单钢管避雷针结构进行了模拟风场下的绕流分析,获得了避雷针各节段在设计风速下的绕流特性、涡脱现象以及体型系数。分析结果表明:随着钢管直径的减小,避雷针绕流的涡脱现象增强,体型系数变大。设计风速下避雷针各节段体型系数数值模拟值与规范取值相差最小为4%。在750kV变电构架单钢管避雷针结构设计中,当钢管直径小于150mm时,为保证结构安全和正常使用,应对结构进行风振动力响应分析。The flow around single circular steel pipe lightning rod of 750kV substation in wind was analyzed with the FLUENT software. The flow characteristics vortex shedding and shape coefficients of each segments of the lightning rod at the design wind speed were obtained. The results show that the vortex shedding of the lightning rod is enhanced and the shape coefficient becomes larger with the decrease of the diameter of the steel pipe. The difference between the simulated shape coefficients and the values designated in the design codes is only 4% under design wind speed. In the design of the single steel pipe lightning rod structure of the 750kV substation the wind vibration response analysis of the structure is recommended to ensure the structural safety and normal use when the diameter of the steel pipe is less than 150mm.

关 键 词：避雷针 圆管绕流 数值风洞 涡脱现象 体型系数 

分 类 号：TM862[电气工程—高电压与绝缘技术]