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Numerical investigation of influence of pantograph parameters and train length on aerodynamic drag of high-speed train

受电弓参数和列车长度对高速列车气动阻力影响的数值研究

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Abstract

This study investigates the influence of different pantograph parameters and train length on the aerodynamic drag of high-speed train by the delayed detached eddy simulation (DDES) method. The train geometry considered is the high-speed train with pantographs, and the different versions have 3, 5, 8, 10, 12, 16 and 17 cars. The numerical results are verified by the wind tunnel test with 3.6% difference. The influences of the number of cars and the position, quantity and configuration of pantographs on flow field around high-speed train and wake vortices are analyzed. The aerodynamic drag of middle cars gradually decreases along the flow direction. The aerodynamic drag of pantographs decreases with its backward shift, and that of the first pantograph decreases significantly. As the number of pantographs increases, its effect on the aerodynamic drag decrease of rear cars is more significant. The engineering application equation for the aerodynamic drag of high-speed train with pantographs is proposed. For the 10-car and 17-car train, the differences of total aerodynamic drag between the equation and the simulation results are 1.2% and 0.4%, respectively. The equation generalized in this study could well guide the design phase of high-speed train.

摘要

本研究通过延迟分离涡模拟 (DDES) 方法研究了不同的受电弓参数和列车长度对高速列车气动阻 力的影响, 其中列车的几何形状选择带有受电弓的高速列车和具有3、 5 、8、 10、 12、 16 和 17 辆车 不同编组数的高速列车, 数值计算结果通过风洞试验得到验证, 其数值计算结果与风洞试验结果相差 3.6%。 分析了编组数以及受电弓的位置、 数量和结构对高速列车周围流场和尾涡流的影响, 中间车的 空气阻力沿空气流动方向逐渐减小, 而受电弓的空气阻力随其向后移动而减小, 其中第一个受电弓的 空气阻力减小得十分明显, 随着受电弓数量的增加, 其对后面车辆的空气阻力减小的影响更加明显。 本文还提出了带有受电弓的高速列车气动阻力的工程应用公式。 对于10 车和17 车编组的列车,应用 公式和仿真结果之间的总空气阻力差异分别为 1.2% 和 0.4%。 本研究中提出的工程应用公式可以很好 地指导高速列车的设计阶段。

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Authors and Affiliations

  1. School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China

    Zhi-kun Sun  (孙志昆), Tian-tian Wang  (王田天) & Fan Wu  (伍钒)

  2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha, 410082, China

    Tian-tian Wang  (王田天)

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  1. Zhi-kun Sun  (孙志昆)
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  2. Tian-tian Wang  (王田天)
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  3. Fan Wu  (伍钒)
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Correspondence to Tian-tian Wang  (王田天).

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Foundation item: Projects(2018YFB1201801-4, 2018YFB1201804-2) supported by National Key R&D Program of China

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Sun, Zk., Wang, Tt. & Wu, F. Numerical investigation of influence of pantograph parameters and train length on aerodynamic drag of high-speed train. J. Cent. South Univ. 27, 1334–1350 (2020). https://doi.org/10.1007/s11771-020-4370-6

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