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Comparison of Aerodynamic Characteristics of High-Speed Train for Different Configurations of Aerodynamic Braking Plates Installed in Inter-Car Gap Region

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Abstract

An improved delayed detached eddy simulation based on a shear–stress transport κ–ω turbulence model is used to investigate the aerodynamic characteristics of a high-speed train with an aerodynamic braking plate installed in the inter-car gap (ICG) region. The flow field and the aerodynamic performance of high-speed trains with different aerodynamic braking plate configurations are compared and analysed. The numerical method used in this study is verified through a wind tunnel test. Results show that opening the plates installed in the ICG significantly increased the aerodynamic drag of the train, especially large downstream plates with relatively small fluctuations in the aerodynamic forces relative to those of large upstream plates. The braking plates significantly affected the levels of downstream ICG turbulence, which then interacted with the external flow to reduce the wake profile.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (51805453, 51978575, and 51975487), the Fundamental Research Funds for the Central Universities (2682018CX14), the Project funded by China Postdoctoral Science Foundation (2019M663551) and the Open Research Project of the National Key Laboratory of Traction Power (TPL1904). We would like to thank Editage (www.editage.cn) and Elsevier (www.elsevier.com) for English language editing.

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Authors and Affiliations

  1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Jiqiang Niu & Yueming Wang

  2. Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province, Chengdu, 610031, Sichuan, China

    Jiqiang Niu & Yueming Wang

  3. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, Sichuan, China

    Rui Li

  4. School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, Gansu, China

    Rui Li

  5. Birmingham Centre for Railway Research and Education, University of Birmingham, Birmingham, B15 2TT, UK

    Rui Li

  6. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China

    Feng Liu

  7. Department of Engineering, University of Aberdeen, Aberdeen, AB24 3UE, UK

    Feng Liu

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  1. Jiqiang Niu
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Correspondence to Jiqiang Niu.

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Niu, J., Wang, Y., Li, R. et al. Comparison of Aerodynamic Characteristics of High-Speed Train for Different Configurations of Aerodynamic Braking Plates Installed in Inter-Car Gap Region. Flow Turbulence Combust 106, 139–161 (2021). https://doi.org/10.1007/s10494-020-00196-0

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