湍流度对二分裂新月形覆冰绞股导线气动力特性的影响研究  

Study on Effect of Turbulivity on Aerodynamic Characteristics of Two-bundled Crescent-shaped Ice-covered Stranded Wire

作　　者：邹建章 张丹丹[2] 张宇 万智渝 ZOU Jianzhang;ZHANG Dandan;ZHANG Yu;WAN Zhiyu(State Grid Jiangxi Province Electric Power Research Institute,Nanchang 330096,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Key Laboratory of Pulsed Power Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,南昌330096 [2]华中科技大学,强电磁工程与新技术国家重点实验室,脉冲功率技术重点实验室,武汉430074

出　　处：《高压电器》2023年第3期78-85,共8页High Voltage Apparatus

基　　金：国家江西省电力有限公司科技项目(521820180013)。

摘　　要：在研究覆冰输电导线风致舞动及其气动力特性时,必须考虑实际风场中的湍流强度。文中选取湿雪天气中易起舞的二分裂新月形覆冰绞股导线作为研究对象,通过风洞试验探究了湍流度变化对其气动力特性的影响。首先探讨了试验模型的绞股外形设计对于获取准确的气动力参数的重要性,然后制作了二分裂新月形覆冰绞股导线的刚性节段模型,并在不同湍流度下测量了该模型的气动三分力系数,并基于Den Hartog以及Nigol舞动机理对该模型的驰振稳定性进行了分析。结果表明:制作覆冰导线模型时设计绞股外形对于结果的准确性非常重要;湍流度不会影响研究对象的气动力系数随风攻角变化趋势,但会对其阻力系数与扭矩系数的幅值产生较大影响;同时,湍流度也会对所研究对象的弛振稳定性产生较大影响。The turbulence intensity in the actual wind field must be considered when studying the wind-induced galloping and aerodynamic characteristics of ice-covered transmission lines.In this paper,a two-bundled crescentshaped ice-covered stranded wire which is likely to dance in wet snow weather is selected as the research object,and the influence of turbulivity variation on its aerodynamic characteristics is explored by wind tunnel tests.First,the importance of the appearance design of the stranded wire of the test model for obtaining accurate aerodynamic parameters is discussed.Then,a rigid segment model of the two-bundled crescent-shaped ice-covered stranded wire is made and the three-component aerodynamic force coefficient of the model at different turbulivity is measured.The galloping stability of the model is analyzed on the basis of Den Hartog and Nigol galloping mechanism.The results show that,in case of making ice-covered wire model,the design of appearance of the stranded wire is very important to the accuracy of the result.The turbulivity will not affect the variation trend of aerodynamic coefficient of the studied object with the wind attack angles,but will have a great influence on the amplitude of its drag coefficient and torque coefficient.The turbulivity,at the same time,also has a great influence on the galloping stability of the research object.

关 键 词：二分裂导线 新月形覆冰 绞股外形 湍流度 气动力特性 舞动机理 

分 类 号：TM752[电气工程—电力系统及自动化]