Calculation of aerodynamic coefficient and windage of hard jumper considering wind attack angle
SHEN Guohui1, ZHANG Shuaiguang1, LOU Wenjuan1, WANG Yiwen2, SONG Gang2
1.Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China;
2.Zhejiang Provincial Electric Power Design Institute, Hangzhou 310007, China
Abstract：Wind tunnel tests and finite element method were used to study aerodynamic coefficient and windage of hard jumper under different wind attack angles. Variation characteristics of drag coefficient and lift one of hard jumpers with varying of wind speed and wind attack angle were analyzed. The recommended values of aerodynamic coefficient of hard jumper under different wind attack angles were given, and the windage calculation method for hard jumper system considering effects of mountain wind field was proposed. The study showed that drag coefficient of hard jumper decreases with increase in wind speed, while its lift coefficient is basically unchanged under high wind speed; drag coefficients of hard jumpers of squirrel-cage types with 2-split, 4-split, 6-split, 8-split and aluminum tube type under wind attack angles with the most significant shielding effect decrease by 53.4%, 27.4%, 25.1%, 16.7% and 57.4%, respectively compared with their maximum values; all kinds of hard jumpers have larger lift coefficients under the specific wind attack angle; the recommended values of drag coefficients and lift coefficients of various hard jumpers under different wind attack angles were given, the maximum value of drag coefficient can be taken as 1.17; the horizontal wind acceleration effect and wind attack angle have larger influences on windage response of hard jumper, increase in windage at mountain top position is the most significant.
沈国辉,张帅光,楼文娟,王轶文,宋刚. 考虑风攻角的硬跳线气动力系数和风偏计算[J]. 振动与冲击, 2021, 40(13): 1-8.
SHEN Guohui, ZHANG Shuaiguang1, LOU Wenjuan1, WANG Yiwen2, SONG Gang2. Calculation of aerodynamic coefficient and windage of hard jumper considering wind attack angle. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(13): 1-8.
［1］龚坚刚. 浙江电网跳线风偏跳闸的分析与措施［J］. 华东电力, 2007, 35(5):112-113.
GONG Jiangang. Line trips in Zhejiang power grid due to windage yaw of jumper wires and relevant countermeasures［J］. East China Electric Power, 2007, 35(5):112-113.
［2］朱映洁, 林方新. 跳线风偏闪络原因分析及预防措施研究［J］. 南方能源建设, 2016, 3(2):77-81.
ZHU Yingjie, LIN Fangxin. Research on flashover factors of jumper wires caused by windage yaw and its preventive measures［J］. Southern Energy Construction, 2016, 3(2):77-81.
［3］陶铃宏, 李涛, 甘宏军, 等. 跳线绝缘子在台风中的风偏特征分析［J］. 电瓷避雷器, 2017, 278(4):157-159.
TAO Linghong, LI Tao, GAN Hongjun, et al. Analysis of the windage yaw characteristics of the jumper insulators in typhoon［J］. Insulators and Surge Arresters, 2017, 278(4):157-159.
［4］候慧, 余菊芳, 黄勇, 等. 台风侵袭下输电线路风偏跳闸风险评估［J］. 高电压技术, 2019, 45(12):3907-3915.
HOU Hui, YU Jufang, HUANG Yong, et al. Risk assessment of transmission line trip caused by windage yaw under typhoon［J］. High Voltage Engineering, 2019, 45(12):3907-3915.
［5］徐海巍, 楼文娟, 李天昊, 等. 微地形下输电线路跳线的风偏分析［J］. 浙江大学学报（工学版）, 2017, 51(2):264-272.
XU Haiwei, LOU Wenjuan, LI Tianhao, et al. Wind-induced swing investigation on transmission line jumper wire under hilly terrain［J］. Journal of Zhejiang University(Engineering Science), 2017, 51(2):264-272.
［6］SHEN G H, YAO J F, LOU W J, et al. An experimental investigation of streamwise and vertical wind field on a typical three-dimensional hill［J］. Applied Sciences, 2020, 10(4): 1463.
［7］毛德坤. 悬垂绝缘子串与跳线在风洞中的风偏试验［J］. 中国电机工程学报, 1988, 8(5):51-54.
MAO Dekun. Suspension insulator string and jumper wire tested in wind tunnel［J］. Proceedings of the Chinese Society for Electrical Engineering, 1988, 8(5):51-54.
［8］游溢, 晏致涛, 李新民, 等. 多联绝缘子串阻力系数风洞试验研究［J］. 华南理工大学学报(自然科学版), 2018, 46(9):66-72.
YOU Yi, YAN Zhitao, LI Xinmin, et al. Wind tunnel tests on drag coefficients of multiple-insulator strings［J］. Journal of South China University of Technology (Natural Science), 2018, 46(9):66-72.
［9］楼文娟, 李天昊, 吕中宾, 等. 多分裂子导线气动力系数风洞试验研究［J］. 空气动力学学报, 2015, 33(6):787-792.
LOU Wenjuan, LI Tianhao, L Zhongbin, et al. Wind tunnel test on aerodynamic coefficients o multi-bundled sub-conductors［J］. Acta Aerodynamica Sinica, 2015, 33(6):787-792.
［10］WARDLAW R L, COOPER K R, KO R G, et al. Wind tunnel and analytical investigations into the aeroelastic behaviour of bundled conductors［J］. IEEE Transactions on Power Apparatus and Systems, 1975, 94(2):642-654.
［11］谢强, 孙启刚, 管政, 等. 多分裂导线整体阻力系数风洞试验研究［J］. 电网技术, 2013, 37(4):1106-1112.
XIE Qiang, SUN Qigang, GUAN Zheng, et al. Wind tunnel test on global drag coefficients of multi-bundled conductors［J］. Power System Technology, 2013, 37(4):1106-1112.
［12］王璋奇, 陈海波, 周邢银. 垭口型微地形对输电线路风载影响的分析［J］. 华北电力大学学报, 2008, 35(4):23-26.
WANG Zhangqi, CHEN Haibo, ZHOU Xingyin. Effects of yakou micro-relief on the wind loading formulation for transmission line design［J］. Journal of North China Electric Power University, 2008, 35(4):23-26.
［13］姚剑锋, 沈国辉, 楼文娟, 等. 三维山体的风场特征及对输电塔风致响应的影响［J］. 振动与冲击, 2017, 36(18):78-84.
YAO Jianfeng, SHEN Guohui, LOU Wenjuan, et al. Wind field characteristics of 3-dimensional hills and their influence on the wind-induced responses of transmission towers［J］. Journal of Vibration and Shock, 2017, 36(18):78-84.
［14］LIU Z, CAO S, LIU H, et al. Large-eddy simulations of the flow over an isolated three-dimensional hill［J］. Boundary-Layer Meteorology, 2019, 170:415-441.
［15］PIROOZ A A S, FLAY R G J. Comparison of speed-up over hills derived from wind-tunnel experiments, wind-loading standards, and numerical modelling［J］. Boundary-Layer Meteorology, 2018, 168:213-246.
［16］ALAM M M, MORIYA M, TAKAI K, et al. Fluctuating fluid forces acting on two circular cylinders in a tandem arrangement at a subcritical Reynolds number［J］. Journal of Wind Engineering and Industrial Aerodynamics, 2003, 91(1/2):139-154.
