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- Title
挟沙强横风环境下高速列车的冲蚀性能.
- Authors
金阿芳; 谢繁荣; 热依汗古丽·木沙
- Abstract
In northwest China, high-speed trains need to run in the environment of strong cross wind with sand. The erosion of wind and sand causes hidden dangers to the train operation safety, In order to study the erosion effect of high-speed train in the wind and sand environment, based on the aerodynamics theory, the Navier-Stokes equation and the standard k-ε turbulence model (k is turbulent kinetic energy, ε is dissipation rate) were used to continuous the air flow, and the discrete phase model (DPM) was used to discrete the sand particles. The erosion effect of high-speed train under different wind speed and sand particle diameter and concentration was simulated. The Euler Lagrange method was used to solve the problem. The results show that the farther the reflected particles are from the train surface with increase of velocity and the more irregular the movement of particles near the train is with the increase of yaw angle. When the velocity is constant, the erosion rate of the train head increases with the increase of diameter. When the diameter of particles is constant, the erosion rate increases with increase of concentration, but with increase of velocity, the erosion rate decreases first and then increases, the maximum erosion rate is 2. 8 times of the minimum erosion rate.
- Publication
Science Technology & Engineering, 2022, Vol 22, Issue 12, p5020
- ISSN
1671-1815
- Publication type
Article