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根据三维定常不可压N-S方程和两方程湍流模型,通过.FLUENT流场分析软件对时速180km/h的某CRH6型车在路堤上运行时绕流流场进行了模拟,计算了头车、中间车、尾车在不同风速下的气动力系数,分析了列车气动系数变化规律。计算结果表明:在横向风作用下,列车在路堤上的气动特性明显不同于无风环境;随着风速增大,头车、中间车、尾车的气动特性有明显的变化差异;头车的阻力系数、侧向力系数最大,其运行安全性最低。
According to the three-dimensional steady incompressible Navier-Stokes equations and two-equation turbulence model, the FLUENT flow field analysis software was used to simulate the flow field of a CRH6 with a speed of 180km / h on the embankment. , The aerodynamic coefficient of the tail car at different wind speeds, the variation law of the aerodynamic coefficient of the train is analyzed. The calculation results show that the aerodynamic characteristics of the train on the embankment are obviously different from the no-wind conditions under the action of lateral wind. The aerodynamic characteristics of the first car, the middle car and the tail car obviously change with the increase of the wind speed. Drag coefficient, maximum lateral force coefficient, the lowest operational safety.