CRH380A高速列车会车气动作用力比较

Comparison of Aerodynamic Forces of CRH380A High-speed Train

CRH380A是我国自行设计的运行速度可达380km/h的高速列车,它的会车气动特性是否优于其他车型,是否产生更小的会车压力波和更小的会车气动力都还需要比较研究。为此利用数值计算方法,采用三维非稳态、黏性方程与两方程紊流模型,计算分析了CRH380A型高速列车在明线及隧道内会车时各车速下的会车压力波及会车气动力、力矩,并将结果与CRH2、CRH3和ICE列车的会车过程气动载荷比较。结果表明,CRH380A型高速列车具有较好的会车气动特性。

CRH380 A,as a self-designed high-speed train,of which the running speed can reach 380 km/h,whether its aerodynamic characteristic is better than other high-speed trains,whether it will produce smaller pressure waves and aerodynamic forces,both of them should be compared and discussed.Thus in this paper,the pressure waves,aerodynamic forces and moments of CRH380 A high-speed train crossing each other in the open air and in a tunnel at different speed are computed and analyzed by using numerical methods with three-dimensional,unsteady,viscous equation and equations turbulence model,then the results of CRH380 Aare compared with that of CRH2,CRH3 and Germany Inter City Express trains.The results show that CRH380 Ahas the best aerodynamic characteristic.