覆冰四分裂导线空气动力系数数值模拟  

Numerical investigation on aerodynamic coefficients of iced quad bundle conductor

作　　者：蔡萌琦[1] 严波[1] 吕欣[2] 周林抒[1] 阎东[3] 陈瑞[3] 

机构地区：[1]重庆大学资源及环境科学学院,重庆400030 [2]重庆大学土木工程学院,重庆400030 [3]河南电力试验研究院,郑州450000

出　　处：《振动与冲击》2013年第5期132-137,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51277186);重庆市自然科学基金(CSTC2009BB7367)

摘　　要：利用Fluent流体动力学分析软件计算典型覆冰四分裂导线在特定风速下的绕流问题,所得各覆冰子导线空气动力系数随风攻角变化曲线与由风洞试验所得规律一致。基于数值模拟和风洞试验所得气动系数确定的Den Hartog系数与Nigol系数随风攻角的变化结果吻合。利用由数值模拟和风洞试验获所得气动参数,采用Abaqus有限元软件模拟典型线路段的舞动,通过舞动特性分析比较发现,利用该两组气动系数模拟得到的导线舞动特性一致,表明采用数值模拟方法确定覆冰导线的空气动力系数可用于模拟覆冰导线舞动。Numerical model for fluid flow around a typical iced quad bundle conductor was set up, and the aerodynamic coefficients varying with the wind attack angle of conductor were numerically investigated by means of FLUENT software. The Den Hartog and Nigol coefficients determined by numerical simulation are in agreement with those obtained by the wind tunnel test. Moreover, the galloping of iced quad bundle conductor lines based on aerodynamic coefficients obtained by numerical simulation and wind tunnel test were simulated respectively by ABAQUS software. The galloping characteristics of the transmission lines based on aerodynamic coefficients deduced by calculation and test are in coincidence, which demonstrates the availability of applying the numerical simulation method to obtain aerodynamic coefficients of iced conductors in the analysis of galloping of transmission lines.

关 键 词：覆冰四分裂导线 空气动力系数 数值模拟 舞动特性 

分 类 号：O39[理学—工程力学] TM75[理学—力学]