单根和双分裂导线风噪声的数值模拟研究  

Numerical simulation on aeolian noise generated by single and twin bundled conductors

作　　者：沈国辉[1] 张扬[1] 宋刚[2] 王轶文[2] 郑翀 SHEN Guohui;ZHANG Yang;SONG Gang;WANG Yiwen;ZHENG Chong(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Zhejiang Electric Power Design Institute,Hangzhou 310012,China;State Grid Corporation Wenzhou Electric Power Company,Wenzhou 325000,China)

机构地区：[1]浙江大学建筑工程学院,杭州310058 [2]浙江省电力设计院有限公司,杭州310012 [3]国家电网温州供电公司,浙江温州325000

出　　处：《振动与冲击》2020年第16期31-38,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51838012);浙江省自然科学基金(LY16E080005)。

摘　　要：针对单根和双分裂导线风噪声采用混合计算方法进行数值模拟。基于导线的绞线结构进行建模,获得单导线风场和声场的分布特征,并与同直径的光滑圆柱结果进行对比,并针对水平和垂直布置双分裂导线风场和声场进行研究。研究表明:导线的阻力系数和总声压级均小于光滑圆柱,而斯特劳哈尔数大于光滑圆柱;在卓越频率段导线和光滑圆柱的风噪声呈现了明显的8字形指向性,而在远离卓越频率段呈现圆形指向,说明导线和圆柱风噪声是一种偶极子声源;导线和光滑圆柱风噪声的总声压级总体呈圆形、略呈8字形分布;垂直布置双分裂圆柱因相互之间无干扰,总声压级为两根单导线风噪声声压级之和;垂直布置的双分裂导线风噪声略小于水平布置双分裂导线风噪声。Numerical simulation using a hybrid method was employed to analyze the aeolian noise generated by single and twin bundled conductors.The calculating model of the single conductor was built based on its stranded shape.The wind and acoustic field of the single conductor were analyzed and compared with those of a smooth circular cylinder with the same diameter.Finally,the wind and the acoustic field of the twin bundled conductors in horizontal and vertical arrangements were also studied.Results show that drag coefficient and sound pressure level(SPL)of the single conductor are smaller than those of the smooth circular cylinder with the same diameter,whereas the Strouhal number of the conductor are bigger than that of the circular cylinder.In the dominating frequency range,the SPL directionality of the conductor and circular cylinder has a shape of figure-of-eight,and in the range away from the dominating frequency,the SPL directionality has a shape of circle,indicating that the aeolian noise generated by conductors and circular cylinders belongs to the dipole type of acoustic source.The overall sound pressure level(OASPL)of the conductors and the circular cylinder has a shape of almost circle shape and a little bit shape of figure-of-eight.The OASPL of the twin bundled conductors in vertical arrangement are equaled to that of the two single conductors.The OASPL of the twin bundled conductors in vertical arrangement are slightly smaller than that of the twin bundled conductors in horizontal arrangement.

关 键 词：风噪声 光滑圆柱 双分裂导线 数值模拟 大涡模拟 

分 类 号：TM75[电气工程—电力系统及自动化]