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采用数值模拟结合风洞试验验证的方法对影响覆冰导线气动力特性的主要因素进行规律性研究,建立了覆冰导线周围的空气流场二维CFD模型.对比湖北省中山口覆冰分裂导线的数值计算结果与风洞试验数据,验证CFD数值模拟方法的准确度和可靠性.在此基础上将CFD数值模拟方法推广至更多工况下的覆冰导线气动力系数数值模拟中,考察了覆冰导线气动力系数随覆冰形状、覆冰厚度、来流风速、导线分裂数目的影响规律.结果表明,该方法是一种实用、有效、准确的气动力系数数值模拟方法,所得气动力系数的变化规律对覆冰导线空气动力特性及舞动研究具有一定的指导意义.
The main factors influencing the aerodynamic characteristics of the iced conductor were studied by numerical simulation combined with wind tunnel test and the two-dimensional CFD model of the air flow around the iced conductor was established. And the wind tunnel test data to verify the accuracy and reliability of CFD numerical simulation method.On this basis, the CFD numerical simulation method is extended to more numerical simulation of the icing conductor aerodynamic coefficient The results show that this method is a practical, effective and accurate method for numerical simulation of aerodynamic forces. The results show that the gas coefficient of ice covered conductor varies with the shape of icing, the ice thickness, the velocity of incoming flow and the number of conductors. The variation law of dynamic coefficient has some guiding significance for the research of aerodynamic characteristics and galloping of icing conductor.