Abstract: The performance of high-speed train running in extreme environments is increasingly concerned, especially running in snow or wind condition. The accumulation of snow in the bogies will affect the running security of trains. Based on the unsteady Reynolds-averaged Navier-Stokes equation and the Euler-Lagrange multiphase flow model. Snow is considered as spherical particles. Three-car formation is adopted to study the path of snow into the bogie area. The properties of snow (density and diameter) are changed to investigate the effect of distribution in bogies. The results of the study show that the most of the snow enter the bogie from the bottom of the train. With the diameter and density of snow increasing, the accumulation of snow in most bogies is decreased. But the amount of snow accumulated in the first bogie of the head car is increased. Because the flow field and geometry structure of the head car is very complex. Snow is more likely to accumulate on the frame, braking system and drive system. And with the diameter or density of the snow increasing, the proportion of snow accumulation on these parts to the total snow volume of the bogies becomes larger.

Key words: snow, bogie, Euler-Lagrange multiphase flow, high-speed train, distribution