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| Numerical simulation on an unsteady three-dimensional flow while high-speed train passing through tunnel with a shaft |
| Revised:June 08, 2004 |
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| DOI：10.7511/jslx20064087 |
| KeyWord:high-speed train,compression wave,pressure gradient,finite volume method,shaft |
| LUO Jian-jun WANG Meng-shu GAO Bo |
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| Abstract: |
| A cell-centered finite volume scheme for numerical integration of Navier-Stokes equations has been presented here in three-dimensional unsteady viscous compressible isentropic flow to model the propagation of compression wave while the high-speed train passing through tunnel with shaft.The numerical procedure uses the on preconditioned second-order backward difference in time,the wall and bottom related to of tunnel are treated with wall functions and the motion of the train the tunnel is treated with sliding mesh technique.During the calculation,the effect of the shaft position,the shaft crosssection area and the numbers of the shaft to the pressure and pressure gradient magnitude are considered.The result shows that the shaft can alter the shape of the compression wave front during its propagation,so it decreases the maximum pressure amplitude and the maximum pressure gradient,but it can not delay the time of pressure rising. |
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