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以C64型敞车为原型车,利用二维定常不可压缩Navier-Stokes方程和两方程紊流模型,采用有限体积法,对横风作用下静止的无导流板满载敞车、无导流板空敞车、有导流板空敞车的气动力进行数值模拟计算。计算结果表明:当横风速度在20.7~46.1 m.s-1时,气动力系数的变化幅度不大,可近似作为常数来对待。在20.7 m.s-1的横风速度下,满载敞车所受侧向力小于空敞车,而升力和倾覆力矩则有所增加,因此敞车装载情况对横风作用下敞车受到的气动力有比较大的影响。敞车侧墙加装导流板后,所受到的气动力没有明显变化。
Taking C64 gondola as the prototype vehicle, a two-dimensional steady incompressible Navier-Stokes equation and a two-equation turbulence model were used. The finite volume method , The aerodynamic force of a free-wheeling bogie is calculated by numerical simulation. The calculation results show that when the crosswind velocity is 20.7 ~ 46.1 m · s-1, the variation of aerodynamic coefficient is not large, and can be treated as a constant approximately. Under the transverse wind speed of 20.7 ms-1, the lateral load of full-load gondola is less than the free-wheeling vehicle, while the lift and overturning moment are increased. Therefore, the gondola load on gondola is greater than the aerodynamic force of gondola influences. Gondola wall mounted deflector, suffered no significant change in aerodynamic force.