Abstract: In order to explore the phenomenon of bogie icing during high-speed train operation in cold regions, the Euler multiphase flow method is used to calculate the collection of snow particles and liquid droplets on the surface of the bogie, and a glaze model based on Shallow-Water is used to simulate the ice growth on the surface of the bogie, and the influence of icing parameters on the amount and shape of icing in the bogie region was studied. The results show that the ability of the bogie surface to capture snow particles and the condensation effect are positively correlated with the content of snow particles and liquid droplets. Icing mainly occurred in the windward area and lower position of the bogie, and became more pronounced with the increase of train speed, due to the increase in relative velocity between particles and airflow, making it difficult for particles to change their trajectory and enter the interior of the bogie. Through the comparison study of multi-step and single-step methods, it is found that the single-step method ignored the change of flow field, affecting the collection of liquid droplets and snow particles, resulting in low icing amount and significantly different ice shapes. Therefore, updating the calculation grid in a timely manner can obtain more accurate results. After one hour of train operation, the braking and suspension devices are mostly covered with ice, posing a serious threat to driving safety. In addition, the ice on the bogie surface hinder the movement of airflow, resulting in a local pressure difference at the bottom of the bogie and an increase in train resistance.

Key words: high-speed train, motor bogie, glaze model, multiphase flow, icing parameters