横风条件下高速列车不同速度下空气动力性能数值仿真

Numerical Study on Aerodynamic Characteristic of High-speed Trains at the Different Speed at the Cross Wind

采用流体力学数值计算软件FLUENT对我国某新型动车组横风条件下的空气动力学性能进行了数值仿真。研究了不同横风风速下,明线上高速列车在不同速度运行时的空气动力性能。根据计算得到的数据,分析了不同横风速度和车速时相应的车体纵、横向气动力变化的规律及成因,得到了相应的结论,为今后列车在横风作用下的运行安全性提供一定的依据。

A numerical simulation of aerodynamic characteristics of new model EMU under crosswind is given, using The Computational Fluids Dynamics Software called FLUENT. The effect of aerodynamic characteristics for two high-speed trains that are running along the same direction under different crosswind speeds is studied, and the data is compared with the single train. According to the calculated data, analyzing of the regularity and cause of the vehicle longitudinal, lateral aerodynamic changes in different wind speed and vehicle speed ,so corresponding conclusions are obtained. To provide a basis for the safety operation at the crosswind in the future.