空气动力学学报2016，Vol.34Issue(5)：680-686,7.DOI:10.7638/kqdlxxb-2014.0126
特高压八分裂导线尾流驰振研究
Wake-induced galloping of eight bundle conductor lines
摘要
Abstract
Wake-induced galloping is a high risk for a safe operation of electrical transmission system due to dense arrangement of sub-conductors in multi-bundle conductors.To investigate the wake-induced galloping characteristics of eight bundle conductors with extra-high voltage,the variation of aerodynamic forces of each sub-conductor in the eight bundle conductors changing with angle of attack was tested by wind tunnel tests.Because of the wake interaction within sub-conductors,a relatively distinguishable difference can be observed among the aerodynamic forces of the eight conductors.Especially,when a leeward sub-conductor is in the wake of windward sub-conductor,the drag exerted on the leeward conductor significantly drops.The wake-induced galloping of eight bundle conductors with two span-lengths 308 m and 405 m was numerically simulated by the ABAQUS software.Based on the simulation results,a critical wind speed has been found for the wake-induced galloping.The galloping will not take place when the wind speed is lower than the critical speed.The motion orbit of the sub-conductor is elliptical with wake-induced galloping.Given the same wind speed,the amplitude of the galloping with long span-length is greater than that with short span-length.关键词
八分裂导线/空气动力特性/尾流驰振/数值模拟Key words
eight bundle conductor/aerodynamic characteristics/wake-induced galloping/numerical simulation分类
航空航天引用本文复制引用
严波,蔡萌琦,何小宝,周林抒..特高压八分裂导线尾流驰振研究[J].空气动力学学报,2016,34(5):680-686,7.基金项目
国家自然科学基金(51277186) （51277186）
