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| Numerical simulation of initial compression wave induced by a high-speed train moving into a tunnel |
| Received:September 04, 2014 Revised:December 22, 2014 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201601015 |
| KeyWord:high-speed train tunnel initial compression wave CRH3 numerical simulation |
| Author | Institution |
| 梅元贵 |
兰州交通大学 机电工程学院, 兰州 |
| 王瑞丽 |
兰州交通大学 机电工程学院, 兰州 |
| 许建林 |
兰州交通大学 机电工程学院, 兰州 |
| 贾永兴 |
兰州交通大学 机电工程学院, 兰州 |
| 周朝晖 |
兰州交通大学 机电工程学院, 兰州 |
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| Abstract: |
| The initial compression wave was caused when a high-speed train enters a tunnel.This wave arrives at the exit portal of the tunnel at local speed of sound and produces a pulse wave.If the magnitude of this pulse wave is large enough, a sonic boom will be generated.Adopting the arbitrary sliding interface (ASI) method and the finite volume method (FVM), the basic characteristics of initial compression waves in a double track tunnel in our country is studied.The PISO algorism and Shear-Stress Transport (SST) k-ω turbulence model were used to solve the governing equations of three dimensional, compressible and unsteady turbulent air flow around the train.Numerical simulation shows that the initial compression wave is caused by the space restriction of the airflow around the train when it enters the tunnel portal.The three-dimensional characteristics are distinct at its initial stage, but smear out as its propagation along the tunnel.Finally, it changes into a one-dimensional plane wave after a certain distance.Furthermore, the magnitude of the initial compression waves is more severe near the train when the pressure monitors are at the same height.When the pressure monitors are closed to the train, the magnitude of the initial compression wave also is more severe near the ground.However, the initial compression waves are basically the same far away from the train.The magnitude of rate of change of initial compression wave is proximately proportional to the cube of the train speed. |
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