J1230101 デカルト格子を用いたトンネル内圧縮波の形成に関する数値解析

DOI Web Site
  • 石橋 亮治
    京都工芸繊維大学大学院工芸科学研究科機械システム工学専攻
  • 福井 智宏
    京都工芸繊維大学大学院工芸科学研究科機械工学系
  • 森西 晃嗣
    京都工芸繊維大学大学院工芸科学研究科機械工学系

書誌事項

タイトル別名
  • J1230101 Numerical Simulation on the Formation of Compressional Wave in a Tunnel on a Cartesian Grid

抄録

When a train travels through a tunnel with a high speed, a compressional wave is generated in the entrance of the tunnel. The compressional wave, which reaches the tunnel exit, causes the noise problems. The formation of this compressional wave can be predicted by using Computational Fluid Dynamics on Body-fitted grid, but this method requires high computational cost. Therefore, this study proposes a CFD on Cartesian grid using virtual flux method. In this paper, for the first stage of this study, we evaluated accuracy of the numerical simulation on the formation of compressional wave in a tunnel when a train running at Mach number of 0.2 enters the tunnel on 2-dimensional Cartesian grid, by comparing pressure variation at an inside of the tunnel with the presence of a tunnel entrance hood. As a result, we report that this method can simulate the tendency that the tunnel entrance hood can suppress a pressure rise. However the simulation overestimates the pressure rise, because of 2-dimensional simulation. To predict the compressional wave more accuracy, we need to analyze with this method on 3-dimentional simulation.

収録刊行物

  • 年次大会

    年次大会 2015 (0), _J1230101--_J1230101-, 2015

    一般社団法人 日本機械学会

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