高速受电弓非定常气动特性分析

为保证高速列车受电弓与接触网之间具有良好的接触特性,针对强烈气流干扰会引起受电弓振荡的问题,用脱体涡模拟(Detached Eddy Simulation,DES)方法研究高速列车受电弓在开、闭口运行条件下的非定常抬升、阻力特性.结果表明,开、闭口运行对受电弓气动特性的影响有较大不同,尤其对受电弓及其滑板的抬升力波动影响明显.开口运行时整弓和滑板的抬升力波动幅度明显大于闭口运行;而开、闭口运行对整弓和滑板气动阻力的大小与波动幅度的影响很小。

Unsteady aerodynamic characteristics analysis of high speed pantograph

To ensure the good contact characteristics of pantograph and catenary of high speed train, as to the problem that pantograph will oscillate under the interference of strong air turbulence, the unsteady uplift and resistance characteristics of high speed pantograph in forward and backward movement are studied with Detached Eddy Simulation(DES) method. The results show that the forward and backward movements have large different effects on aerodynamic characteristics of pantograph, particularly on the uplift fluctuation of pantograph and its slider. The uplift fluctuations of pantograph and its slider in backward movement are larger than that in forward movement. However, forward and backward movements have little effect on the aerodynamic drag and fluctuations of pantograph and its slider.