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Journal of Zhejiang University-SCIENCE A

, Volume 12, Issue 12, pp 957–963 | Cite as

Unsteady simulation for a high-speed train entering a tunnel

  • Xin-hua Li
  • Jian Deng
  • Da-wei Chen
  • Fang-fang Xie
  • Yao Zheng
Article

Abstract

In order to study the unsteady aerodynamics effects in railway tunnels, the 3D Reynolds average Navier-Stokes equations of a viscous compressible fluid are solved, and the two-equation k-ɛ model is used in the simulation of turbulence, while the dynamic grid technique is employed for moving bodies. We focus on obtaining the changing tendencies of the aerodynamic force of the train and the aerodynamic pressures on the tunnel wall and train surface, and discovering the relationship between the velocity of the train and the intensity of the micro pressure wave at the tunnel exit. It is shown that the amplitudes of the pressure changes in the tunnel and on the train surface are both approximately proportional to the square of the train speed, so are the microwave and the drag of the train.

Key words

High-speed train Aerodynamics Railway tunnel Numerical analysis 

CLC number

U270.1+1 V211 

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Copyright information

© Zhejiang University and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Xin-hua Li
    • 1
  • Jian Deng
    • 2
  • Da-wei Chen
    • 2
  • Fang-fang Xie
    • 1
  • Yao Zheng
    • 1
  1. 1.School of Aeronautics and AstronauticsZhejiang UniversityHangzhouChina
  2. 2.National Engineering Laboratory for System Integration of High-Speed Train (South)CSR Qingdao Sifang Co., Ltd.QingdaoChina

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