基于数值模拟与风洞试验的多分裂导线阻力系数干扰效应  

Study of interference effect of bundled conductors drag coefficient based on numerical simulation and wind tunnel test

作　　者：郭向华 邓锋华 肖雁 林锐 翁兰溪 陈伏彬 GUO Xianghua;DENG Fenghua;XIAO Yan;LIN Rui;WENG Lanxi;CHEN Fubin(Construction branch of State Grid Fujian Electric Power Co., Ltd., Fuzhou 350003,China;School of Civil Engineering, Changsha University of Science &Technology, Changsha 410114;Power China Fujian Electric Power Engineering Co., Ltd.,Fuzhou 350003,China)

机构地区：[1]国网福建省电力有限公司建设分公司,福建福州350003 [2]长沙理工大学土木工程学院,湖南长沙410114 [3]中国电建集团福建省电力勘测设计院有限公司,福建福州350003

出　　处：《电力科学与技术学报》2022年第1期186-192,共7页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(51778072);长沙理大学实践创新项目(SJCX202021)。

摘　　要：为研究分裂导线阻力系数随风攻角与分裂间距的变化规律,采用CFD数值模拟方法研究了不同分裂数与分裂间距下的低风压导线阻力系数随风攻角的变化规律。通过在边界层风洞中开展90 cm长的导线节段模型试验,获得了低风压导线不同风攻角条件下导线阻力系数随雷诺数、尾流干扰的变化规律,并与数值模拟结果进行对比。研究结果表明:多分裂导线阻力系数干扰效应明显,随着分裂数的增加,平均阻力系数可降低20%以上;多分裂导线阻力系数随风攻角变化明显,在风偏的情况下将出现风阻系数峰值:二分裂导线在风攻角为18°~24°出现峰值,四分裂导线在风攻角为22.5°~30°出现峰值;分裂导线风荷载设计应考虑风偏下的不利影响,以及干扰效应影响。To study the variation law of drag coefficient for the bundled conductor with the wind attack angle and splitting distance,the CFD numerical simulation method is employed to study the drag coefficient variation law with the wind direction angle of drag reduced conductor under different splitting numbers and spacing.A model test is carried out in the boundary-layer wind tunnel for a 90-cm conductor.Under different wind attack angles,the drag coefficient variation of the drag reduced conductor,concerning Reynolds number and interference effect,are obtained and then compared with numerical simulation results.Research results show that the interference effect of the multi-bundled conductor drag coefficient is noticeable,and the average drag coefficient can be reduced by more than 20%with the increase of splits.The multi-bundled conductor drag coefficient varies obviously with the wind attack angle.The peak value of the wind drag coefficient will appear in the case of windage yaw.The peak value of 2-bundled conductor appears at a wind attack angle of 18°~24°,and the peak value of 4-bundled conductor appears at a wind attack angle of 22.5°~30°.The wind load design of bundled conductors should consider the adverse influence of windage yaw and the interference effect.

关 键 词：分裂导线 风阻系数 干扰效应 风洞试验 数值模拟 

分 类 号：TM75[电气工程—电力系统及自动化]