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This study investigates the aerodynamic effects of high-speed trains passing through the critical tunnel at 400 km/h, focusing on micro-pressure waves (MPWs) and other related aerodynamic phenomena, as well as the mitigation effects of buffer hoods. A three-dimensional computational fluid dynamics (CFD) model, incorporating the SST k-ε turbulence model, is employed to simulate the tunnel-train-air interaction. The analysis of buffer hoods of varying lengths reveals that buffer hoods effectively reduce the impact of MPWs, leading to an overall improvement in tunnel aerodynamic performance. The results demonstrate that buffer hoods, as a viable mitigation solution, significantly suppress the MPWs generated by high-speed trains passing through the critical tunnel.

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Numerical Investigation on Mitigation of Micro-Pressure Waves for High-Speed Trains Passing Through the Critical Tunnel at 400 km/h

  • 会议论文

  • 发表日期：

    2026年

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  • Haotian Luo,
  • Tian Li,
  • Weihua Zhang

摘要

This study investigates the aerodynamic effects of high-speed trains passing through the critical tunnel at 400 km/h, focusing on micro-pressure waves (MPWs) and other related aerodynamic phenomena, as well as the mitigation effects of buffer hoods. A three-dimensional computational fluid dynamics (CFD) model, incorporating the SST k-ε turbulence model, is employed to simulate the tunnel-train-air interaction. The analysis of buffer hoods of varying lengths reveals that buffer hoods effectively reduce the impact of MPWs, leading to an overall improvement in tunnel aerodynamic performance. The results demonstrate that buffer hoods, as a viable mitigation solution, significantly suppress the MPWs generated by high-speed trains passing through the critical tunnel.