高速列车转向架区域积雪形成原因及防积雪研究
Cause analysis of snow packing in high-speed train's bogie regions and anti-snow packing design
摘要
Abstract
To solve the serious problems of snow packing in high-speed train's bogies under the blizzard environment, the flow structure in bogie regions of a CRH380 high-speed train was simulated by the three-dimensional Reynolds-averaged SST k?ω two-equation turbulence model and finite volume method. The cause of snow packing and the location that was easily covered snow were analyzed. A flow control method was proposed. The results show that airflow coming from the bottom of the train increases with a tilt angle in the bogie regions, which can impact the windward side of the bogies and lead to snow packing. Meanwhile, snowflakes carried by the decelerated airflow are stranded and trapped in blind corners of bogies. Braking systems, spring suspensions, core plates and the windward side of bogies are the configurations which are mainly covered snow. The raising angles of airflow entering into the bogie regions are directly influenced by the height between the rail level and the bottom close to the bogies. The uniform height for the car bottom is proposed. The designed flow control device can effectively reduce the airflow rushing into the bogie regions by 46.51%. Therefore, the flow structures in the bogie regions are improved.关键词
高速列车/转向架/积雪成因/流动控制/数值模拟Key words
high-speed train/bogie/causes of accumulated snow/flow control/numerical simulation分类
交通工程引用本文复制引用
苗秀娟,何侃..高速列车转向架区域积雪形成原因及防积雪研究[J].中南大学学报（自然科学版）,2018,49(3):756-763,8.基金项目
国家重点研发计划项目(2016YFB1200403) （2016YFB1200403）
高铁联合基金资助项目(U1534210) （U1534210）
湖南省自然科学基金资助项目(14JJ1003) （14JJ1003）
国家自然科学基金青年基金资助项目(51605044) （51605044）
湖南省自然科学基金青年基金资助项目(2016JJ3004) （2016JJ3004）
工程车辆安全性设计与可靠性技术湖南省重点实验室开放基金资助项目(KF1607) (Project(2016YFB1200403) supported by the National Key Research and Development Program of China （KF1607）
Project(U1534210) supported by the High Speed Railway Union Fund （U1534210）
Project(14JJ1003) supported by the Natural Science Foundation of Hunan Province （14JJ1003）
Project(51605044) supported by the Youth Foundation of National Natural Science Foundation of China （51605044）
Project(2016JJ3004) supported by the Youth Foundation of Natural Science Foundation of Hunan Province （2016JJ3004）
Project(KF1607) supported by the Open Fund of Key Laboratory of Safety Design and Reliability Technology for Engineering Vehicle of Hunan Province) （KF1607）
