具有横风效应的磁浮列车湍流外流场特性数值计算

Numerical Analysis of Turbulent Flow Around Maglev Train under Cross-wind

采用有限容积法对磁浮列车以500km/h的速度运行、受10～40 m/s的横向自然风作用下的外流场特性进行了详尽的计算分析,得到了列车顶部和侧面不同位置的速度和压力分布特性以及列车的尾流特性.结果表明:列车上部及背风侧面的速度及压力波动均随着自然风速的增加而增大,并且列车尾涡中心也由于受自然风的影响而沿着自然风的方向偏转,而自然风对迎风侧的压力波动影响较小.

Turbulent flow over maglev trains under 10440 m/s cross-wind are investigated using the finite volume method when the speed of the train is 500 km/h. The velocity and pressure distribution above and on the side of vehicles are calculated. Calculation results show that the changes of velocity and pressure above and on the leeward side of vehicles increase along with the accretion of the speed of cross-wind. Also due to the influence of the crosswing centers of the trailing vortexes deflect along with the direction of cross-wind. While cross-wind has little effects on the change of pressure on windward side.