| 考虑绞凸特征的输电线气动力CFD模拟 |
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| 引用本文： | 刘成,刘慕广,邹云峰.考虑绞凸特征的输电线气动力CFD模拟[J].铁道科学与工程学报,2020(1):215-223. |
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| 作者姓名： | 刘成 刘慕广 邹云峰 |
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| 作者单位： | 华南理工大学亚热带建筑科学国家重点实验室;高速铁路建造技术国家工程实验室 |
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| 基金项目： | 国家自然科学基金资助项目(51978285);中央高校基本科研业务费专项资金资助项目(2015ZZ018);高速铁路建造技术国家工程实验室开放基金资助项目(2017HSR06) |
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| 摘 要： | 采用商用FLUENT软件,基于雷诺时均模型,以JL/G1A-630/45同心绞线为对象进行二维CFD数值计算,在网格和时间步长无关性检查的基础上,分析网格离散方式和不同雷诺数下输电线的气动力系数及Strouhal数。研究结果表明:为保障CFD数值计算的结果合理性,需开展网格和时间步长的无关性检查;结构网格较非结构网格能更好的模拟绞线的气动力;Re≤1.65×105时,具有绞凸的输电线气动力系数CFD模拟结果随雷诺数的变化规律与等参数的光圆圆截面模拟结果相似,但输电线和圆截面气动力间的数值差异随雷诺数的变化而变化;在常规导线的缩尺状态(500
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| 关 键 词： | 输电线 绞凸 数值模拟 气动力 雷诺数 |
CFD simulation of transmission lines aerodynamics considering the twisted convex characteristics |
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| LIU Cheng,LIU Muguang,ZOU Yunfeng.CFD simulation of transmission lines aerodynamics considering the twisted convex characteristics[J].Journal of Railway Science and Engineering,2020(1):215-223. |
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| Authors: | LIU Cheng LIU Muguang ZOU Yunfeng |
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| Institution: | (State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510641,China;National Engineering Laboratory for High Speed Railway Construction,Changsha 410075,China) |
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| Abstract: | Using the commercial software FLUENT,the CFD numerical calculation of JL/G1A-630/45 concentric stranded wire was performed based on the Reynolds time-average model(RANS).Based on the grid and time step independence check,the aerodynamic coefficients and Strouhal number of the transmission line under different mesh type and different Reynolds numbers(Re)were analyzed.The results show that in order to ensure the rationality of the CFD numerical calculation results,it is necessary to carry out the independence check of the grid and time step.The structural grid can better simulate the aerodynamics of the stranded wire than the unstructured grid.When Re is less than 1.65×105,the variation of aerodynamic coefficients with Reynolds number is similar to that of circular section with equal parameters,but the difference between numerical values is affected by Reynolds number.What’s more,in the scale state of conventional transmission lines(500
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| Keywords: | transmission lines strand convex numerical simulation aerodynamics Reynolds numbers |
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