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Behavior of Piston Wind Induced by Braking Train in a Tunnel

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  • Xiaonan Yan

    (Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Liangliang Tao

    (Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Junqin Peng

    (Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Yanhua Zeng

    (Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Yong Fang

    (Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Yun Bai

    (Sichuan Communication Surveying & Design Institute, Chengdu 610031, China)

Abstract

It is critical to discover the behavior of piston wind induced by a braking train in a tunnel, but there is little research on the theoretical derivation for piston wind behavior. Predicting piston wind behavior as an unsteady airflow by a theoretical formula is hard work due to the complexity of train running states and airflow fields. Herein, we develop a mathematical model to investigate the behavior of piston wind as an unsteady airflow, considering the variation of wind direction in the annular area. In general, the theoretical model is validated by experiments. However, experimental studies about piston wind are scarce. In this study, we simulated the emergent braking process of a train to validate the mathematical model by establishing a 1/50 scaled experimental configuration. The piston wind data tested in the experiment have good agreement with the results calculated by theoretical formulas. In addition, sensitivity analysis of the effect parameters of piston wind (i.e., tunnel length, train length, train speed and blockage ratio) was conducted. The theoretical formulas derived in this paper are applicable to similar train running conditions in railway tunnels or subway tunnels.

Suggested Citation

  • Xiaonan Yan & Liangliang Tao & Junqin Peng & Yanhua Zeng & Yong Fang & Yun Bai, 2020. "Behavior of Piston Wind Induced by Braking Train in a Tunnel," Energies, MDPI, vol. 13(23), pages 1-19, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6420-:d:457105
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    References listed on IDEAS

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    1. Liu, Minzhang & Zhu, Chunguang & Zhang, Huan & Zheng, Wandong & You, Shijun & Campana, Pietro Elia & Yan, Jinyue, 2019. "The environment and energy consumption of a subway tunnel by the influence of piston wind," Applied Energy, Elsevier, vol. 246(C), pages 11-23.
    2. Zhang, Huan & Zhu, Chunguang & Zheng, Wandong & You, Shijun & Ye, Tianzhen & Xue, Peng, 2016. "Experimental and numerical investigation of braking energy on thermal environment of underground subway station in China's northern severe cold regions," Energy, Elsevier, vol. 116(P1), pages 880-893.
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    Cited by:

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