分散式排管敷设电缆群温度场的流固耦合计算  

Fluid-solid Coupling Computation on Temperature Field of Decentralized Pipe Cable System

作　　者：郑雁翎[1,2] 仪涛[1] 张冠军[1] 李洪杰[1] 张延辉[3] 杨凤民[3] 宋伟[4] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [2]宝鸡文理学院电子电气工程系,宝鸡721007 [3]郑州供电公司,郑州450006 [4]河南省电力公司,郑州450052

出　　处：《高电压技术》2010年第6期1566-1571,共6页High Voltage Engineering

基　　金：河南省电力公司科技项目(2006第3批第8项)~~

摘　　要：排管敷设电缆群温度场是一个传导、对流和辐射3种传热方式的耦合过程,电缆群温度场和载流量计算必须考虑排管内部的空气自然对流和辐射传热。为此,基于传热学的基本原理,建立了10kV地下排管敷设电缆本体温度场域和电缆整体温度场域的有限元计算模型。采用有限元与流函数-涡量法相结合的方法,实现了传导、自然对流和辐射3种传热方式的流固耦合计算。借助于有限元分析软件ANSYS,得到含有内部空气对流和辐射的分散式排管敷设电缆群温度场分布。利用有限元和流函数-涡量法计算,克服了现有标准和文献中根据经验公式计算空气层热阻而引起的误差及不足,提高了计算精度。The temperature field of pipe cables is a coupled conduction-convection-radiation field,convection and radiation of air in pipes should be calculated for the temperature field and ampacity of the pipe cables.FEM calculation of 10 kV cables in pipes was modeled by the basic principles of heat transfer.Based on conduction,natural convection and radiation heat transfer modes,fluid-solid coupling computation was implemented by vortices-stream function method and the finite element method.A kind of finite element analyzing software ＂ANSYS＂ was used to calculate temperature field distribution of cables in decentralized pipes that have cross-ventilation and radiation.The results show that the fluid-solid coupling computation has many merits compared with empirical formula adopted in existing standard and papers to calculate the thermal resistance of air,this method is of high accuracy.

关 键 词：有限元法 电力电缆 排管敷设 载流量 温度场 流固耦合计算 

分 类 号：TM757[电气工程—电力系统及自动化]