Title: Dynamic Numerical Simulation of a High Speed Train Passing Through Tunnel
Abstract: Internal pressure waves will be caused when high speed train travels through tunnels,which induce big pneumatic loads for car body. Tunnel pressure wave problem is the key factor which must be considered during the design of high speed train and the air ventilation system. Based on three- dimensional unsteady incompressible flow Navier- Stokes equations,the large eddy simulation( LES) turbulence model and dynamic mesh algorithm that ground is stationary but the train is moving is utilized to make dynamic numerical simulation computations for CRH2 high- speed train which is passing through a 100 m tunnel at a speed of 100 m / s. The results show that when the headstock of the train passes through a tunnel,a positive pressure wave is generated in front of the headstock of the train which propagates along the tunnel towards the exit and reflects when reaching the exit,and it becomes a negative pressure wave which propagates towards the entrance. The propagation and reflection of the pressure wave dramatically change the pressure of the air in the tunnel,which seriously affects safe and smooth running of the trains.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot