铁道科学与工程学报2017，Vol.14Issue(12)：2516-2524,9.
高速列车制动夹钳积雪结冰数值仿真研究
Numerical research of the snow and ice accumulation on the brake calipers of the high-speed trains
摘要
Abstract
A numerical simulation method based on the Realizable k-εturbulence model was used to explore the flow features around the high-speed train travelling in cold winter. The accuracy of mesh resolution and methodology of CFD was validated by wind tunnel tests. The flow characteristic around brake calipers and the pressure distribution were also analyzed. The results show that when high-speed train running in one direction, the high-speed streamlines primarily flow under the bogie, while only few streamlines with low speed move up and flow into the upper region of the bogie. Lots of snow particles below the bogie follow the high-speed streamlines directly impact on the brake calipers, causing massive snow packing on the bottom surface of brake calipers. Fewer snow particles move up into the upper space, and result in little snow accumulation on the top of the brake calipers because of gravity. The flushing effect on the rear brake calipers caused by streamlines carrying the massive snow particles is much higher than the front, and the front brake calipers are in the negative pressure environment while the rear brake calipers are in high positive pressure. Therefore, the snow and ice accumulation on the rear brake calipers is much more than the front.关键词
高速列车/制动夹钳/积雪结冰/数值仿真Key words
high-speed train/brake calipers/snow and ice accumulation/numerical simulation分类
交通工程引用本文复制引用
黄照伟,冯永华,高广军,王家斌,张琰..高速列车制动夹钳积雪结冰数值仿真研究[J].铁道科学与工程学报,2017,14(12):2516-2524,9.基金项目
中南大学创新驱动计划项目(2015CX003) （2015CX003）
国家自然科学基金资助项目(U1334205,U1534210) （U1334205,U1534210）
湖南省自然科学基金资助项目(14JJ1003) （14JJ1003）
国家重点研发计划资助项目(2016YFB1200403-C-07) （2016YFB1200403-C-07）
高寒动车组转向架防积雪结冰深化研究项目(SF/JS-马字-2016-570) （SF/JS-马字-2016-570）
