覆冰分裂导线气动力系数模拟-杨秀萍.pdfVIP

覆冰分裂导线气动力系数模拟 杨秀萍，张喆，郝淑英 天津理工大学机械工程学院，天津 300384 [ 摘摘 要要 ] 为研究覆冰分裂导线舞动时的气动力特性，从弱耦合角度出发，基于 Fluent 软件，利用用户 摘摘 要要 自定义函数UDF 对四分裂导线的舞动轨迹进行编程并结合动网格技术实现流固耦合。计算了 新月形覆冰四分裂导线在横向振动下的气动力系数，并与静态模拟结果进行比较；分析了尾流 对子导线气动力的影响。结果表明：相同风速下，动态气动力系数大于静态值，二者具有相同 的变化规律；舞动时，迎风侧子导线尾流偏移，对背风侧子导线的影响减小，使背风侧子导线 的动态气动力系数比静态时显著增加。工程中预测导线舞动及防舞研究时，应考虑动态气动力 的影响。 [ 关键词关键词 ] 覆冰四分裂导线；气动力；舞动；尾流 关键词关键词 Aerodynamic Coefficients Simulation of Iced Quad Bundled Conductors Yang Xiuping, Zhang Zhe，HAO Shuying School of Mechanical Engineering, Tianjin University of Technology, Tianjin 300384 [ Abstract ] In order to study the aerodynamic characteristics of galloping of iced bundle conductors, based on software Fluent, the program described the track of conductor galloping with user-defined function and dynamic mesh technology were used to realize the fluid and solid coupling from the weak coupled model. The aerodynamic coefficients of crescent iced quad bundle conductors in the lateral vibration were calculated, and compared with the results from simulation in static; the influence of the wake on the sub-conductors was analyzed. The results show that the dynamic aerodynamic coefficients are larger than that of static, and they have the same variation laws under the same wind speed. The effect of the wake of windward sub-conductors on the leeward sub-conductors reduces because of wake excursion, dynamic aerodynamic coefficients of leeward sub-conductors are larger evidently than that of static. When the forecast of galloping and study of anti- galloping in engineering, the influence of dy