扰流防舞器气动力特性数值模拟
Simulation of Aerodynamic Characteristics of Air Flow Spoiler
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摘要: 为了研究扰流防舞器对覆冰输电导线气动力的影响及其防舞效果, 利用计算流体动力学技术(CFD)模拟了新月形覆冰导线截面的气动力曲线, 计算了安装扰流防舞器后新月形覆冰导线一个节距内8个等分截面的平均气动力曲线。计算结果表明:安装扰流防舞器后导线的阻力系数显著增大, 升力系数曲线没有明显变化, 扭矩系数曲线负斜率的绝对值减小; 扰流防舞器具有防舞作用。Abstract: The impact of the air flow spoiler on the aerodynamic characteristics of iced transmission lines and its effects of anti—galloping were researched.The aerodynamic characteristics curves of the crescent iced transmis. sion line were simulated by the method of Computational Fluid Dynanlics(CFD).The average aerodynamic charac. teristics curves of eight equal sections in a circular pitch of the crescent iced transmission line installed with the air spoiler were simulated.The results show that the drag coefficient of the crescent iced transmission line installed with air flow spoiler is larger than the crescent iced transmission line.The lift coefficient curve doesn't change much.The absolute value of negative slope of torsion coefficient curve decreases.The air flow spoiler is useful for preventing galloping.