Three Dimensional CFD Analysis of Transient Compressible Flows Around a Train Passing Through a Tunnel

摘要

Three dimensional computations were performed using the KIV-3 code to investigate the unsteady compressible turbulent flours about a practical train passing through a single-track tunnel. Both length of the train/tunnel and speed of the train were considered to investigate their effects on the train-tunnel interaction. In order to understand the whole process of the train-tunnel aer- odynamic interaction, we studied the formation and propagation of the pressure waves, the reflection and radiation of the waves at the tunnel portals and the histories of aerodynamic forces on the train. The experimental results were compared well with the computational data. The code can be used to predict the aerodynamic phenomena of the train-tunnel system.