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Model Experiments on the Tunnel Compression Wave Using an Axisymmetric and Three-Dimensional Train Model

  • T. Fukuda
  • H. Saito
  • T. Miyachi
  • K. Kikuchi
  • M. Iida
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 118)

Summary

Generation of the compression wave by a train entering a tunnel is investigated by model experiments. In the model experiments, the train and the tunnel are represented by an axisymmetric model, a three-dimensional mirror image model and a three-dimensional model. The experimental results indicate that the effect of the three-dimensionality of the train nose shape is approximately 2 % for the pressure gradient of the compression wavefront when the train nose is streamlined, hence without large flow separation around the train nose. Furthermore, the relationship between the pressure gradient of the compression wavefront and the train position in a cross-section at the tunnel portal is clarified.

Keywords

Compression Wave Tunnel Model Tunnel Entrance Tunnel Exit Normalize Pressure Gradient 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer 2012

Authors and Affiliations

  • T. Fukuda
    • 1
  • H. Saito
    • 1
  • T. Miyachi
    • 1
  • K. Kikuchi
    • 1
  • M. Iida
    • 1
  1. 1.Railway Technical Research InstituteKokubunji-shiJapan

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