Analysis of the motion characteristics of snow particles in the bogie region of a high-speed train

被引：0
|
作者：
Cai L. [1 ]
Zhang J. [1 ]
Li T. [1 ]
机构：
[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu
来源：
Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica | 2019年 / 49卷 / 12期
关键词：
Bogie; Discrete phase model; High-speed train; Snow accumulation;
D O I：
10.1360/N092018-00379
中图分类号：
学科分类号：
摘要：
In order to study the motion characteristics of snow particles in a high-speed train bogie region, the aerodynamic calculation model of a complex-shape bogie was established. The Lagrangian method was used to simulate the movement of snow particles in the airflow. The snow particle motion in the trailer bogie region and the impact characteristics of snow particles and walls were studied. The results show that the snow particles were turned upside down in the bogie region from the rear of the two wheels. The concentration of snow particles in the lower part of the bogie region was high, whereas that in the upper part was low. Only a small portion of the snow particles in the bottom airflow entered the bogie region with the upward airflow. The windward area of structures such as the frame, wheelset, brake disc, and the lower part of the brake caliper, was the concentrated collision part of the snow particles. The number of snow particles that impacted those structures was more than an order of magnitude higher than that in other parts of the bogie. When the train's running speed was 300 km/h, the surface of the lower part of the bogie had a high impact rate of snow particles, which was in the range of 20-56 m/s. The impact rate in the upper part of the bogie was less than 20 m/s, and the average surface impact velocity at its top surface was less than 2 m/s. When the train ran at high speed, most of the areas where snow particles were concentrated had a higher than normal impact speed. © 2019, Science Press. All right reserved.
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页码：1593 / 1602
页数：9
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