Whenhigh-speed trains pass through tunnels, large pressure fluctuations are produced and propagated through the tunnel as waves. These pressure waves affect the comfort of passengers. A number of one-dimensional methods for predicting the pressure waves have been developed and realistic results have been obtained in about forty years. The numerical method is introduced based on one-dimensional, unsteady, compressible, non-homentropic flow model and method of characteristics in the paper. The different applications of this numerical method are presented for the principal features of the flow in a high-speed railway tunnel. The application examples include a train passing through a tunnel and two trains passing each other in a tunnel. The examples have been carried out under the different conditions of the tunnel without or with airshafts, cross-passages, and perforated wall in tunnel.
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- The One-Dimensional Unsteady Flow Prediction Method and Applications on the Pressure Waves Generated by High-Speed Trains Passing through a Tunnel
Y. G. Mei
C. H. Zhou
- Springer Berlin Heidelberg