Journal of the Korean Society for Railway (한국철도학회논문집)
- Volume 3 Issue 4
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- Pages.229-236
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- 2000
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- 1738-6225(pISSN)
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- 2288-2235(eISSN)
Numerical Simulation of the Unsteady Flow Field Induced by a High-speed Train Passing through a Tunnel
터널을 통과하는 고속철도차량에 의해 형성되는 비정상 유동장의 수치해석
Abstract
In this study, the unsteady flow field induced by a high-speed train passing through a tunnel is numerically simulated by using an axi-symmetric Euler Equation. The modified patched grid scheme applied to a structured grid system was used to handle the relative motion of a train. The hybrid-dimensional approach which mixed 1D and axi-symmetric dimension was used to reduce the computation time and memory storage. By employing the hybrid-dimensional approach, a long tunnel as much as 5 km was able to be simulated efficiently. The results show that the maximum pressure rise in the tunnel by the entrance of the train is a function of both train speed and train-tunnel cross-sectional area ratio. The unsteady pressure fluctuation in the tunnel and around the train was also investigated in the real condition; Korean high-speed train on the Seoul-Pusan line.
Keywords
- High-Speed Train;
- Pressure wave;
- Train-Tunnel Interaction;
- Zonal method;
- Hybrid-dimensional Approach
- 고속열차;
- 압력파;
- 열차-터널 상호작용;
- 다중영역기법;
- 혼합차원기법;