覆冰导线气动力参数研究与仿真

发布时间：2018-07-17 15:58

【摘要】：偏心覆冰导线在风激励作用下极易发生舞动,对整个供电系统安全运行造成重大危害,而覆冰导线气动力参数则是导线舞动研究的基础。利用风洞试验研究覆冰导线气动力参数成本昂贵,且无法满足我国局部微地形多变、线路复杂的要求。针对上述问题,对不同坡角的微地形进行数值仿真,得到空气特性变化规律。同时根据新月型覆冰特点建立了二维覆冰导线模型和三维覆冰导线模型,对新月形覆冰的气动力参数进行数值仿真,并和风洞试验数据进行对比。结果表明,通过数值仿真可对风洞试验进行参考补充,并得到气动力参数变化趋势与风洞试验结果基本保持一致。同时调整模型,得到阻力系数和升力系数尖峰值随湍流强度的增大而增大。所得到的气动力参数可为覆冰导线舞动研究提供一定的参考。
[Abstract]:Eccentricity ice-covered conductors are prone to galloping under the action of wind excitation, which causes great harm to the safe operation of the whole power supply system, and the aerodynamic parameters of ice-coated conductors are the basis of the study of conductor galloping. Using wind tunnel test to study the aerodynamic parameters of ice-covered conductors is expensive and can not meet the requirements of local micro-topography and complex lines in China. In order to solve the above problems, the variation of air characteristics is obtained by numerical simulation of different slope angles. At the same time, according to the characteristics of crescent icing, two-dimensional and three-dimensional ice-coated lead models are established. The aerodynamic parameters of crescent icing are numerically simulated and compared with wind tunnel test data. The results show that the numerical simulation can be used as a reference supplement for wind tunnel test, and the variation trend of aerodynamic parameters is basically consistent with the results of wind tunnel test. By adjusting the model, the peak values of drag coefficient and lift coefficient increase with the increase of turbulence intensity. The obtained aerodynamic parameters can provide a reference for the study of the galloping of ice-coated conductors.
【作者单位】：武汉大学;
【分类号】：TM752

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