铁道科学与工程学报2017，Vol.14Issue(6)：1113-1121,9.
突风口环境下的高速列车周围流场数值模拟
Numerical simulation of the flow around a high-speed train moving through a crosswind flow
摘要
Abstract
In this paper, the flow structures around the train and the aerodynamic forces of the train were analyzed based on the 3-D unsteady compressible Reynolds-averaged Navier-Stokes equations with the standardk-ε turbulence model and the sliding grid method. Results show that before entering the crosswind area, the flow structure around high-speed train is nearly symmetrical, and the pressure on the windward and the leeward has no marked difference. Because the whole of carbody has entered the crosswind and the wind speed has acted on it, there is a significant difference between windward and leeward, which indicates that the windward has a positive pressure distribution while the leeward has a negative one. The situations the train entering and moving out the crosswind area are similar. After the train is far away, the flow structures around it recover the symmetry as before. By comparing with the results bewtween the numerical simalations and wind tunnel tests, the error is less than 5%.关键词
高速列车/横风/动模型/气动力Key words
high-speed train/cross-wind/test device/aerodynamics force分类
交通工程引用本文复制引用
李鹏,梁习锋,牛纪强..突风口环境下的高速列车周围流场数值模拟[J].铁道科学与工程学报,2017,14(6):1113-1121,9.基金项目
高速铁路基础研究联合基金重点资助项目(U1134205) （U1134205）
中南大学教师研究基金资助项目(2013JSJJ013) （2013JSJJ013）
