Based on three-dimensional viscous,compressible,non-stationary flow N-S e-quation, finite volume method was adopted to deal with aerodynamic drag numerical a-nalysis of double container car passing through a tunnel. Meanwhile,the train speed,the blockage ratio and the tunnel length are considered as influence factors of the aerodynamic drag. Results show that as the train runs into the tunnel,the aerodynamic drag rises sharply. Soon afterwards, the drag value fluctuates slightly,but it keeps 2-3 times bigger than the aerodynamic drag in open air. In the same running condition, the drag that the head car received is bigger than that of the middle car and the tail car which is much similar. The relation between drag of each double container car and the square of the train speed,and the blockage ratio is direct ratio. The variation trend between drag of each double container car and the tunnel length shows non-monotonic feature.%采用三维粘性、可压缩、非定常流的N-S方程,分别考虑列车速度、阻塞比和隧道长度对双层集装箱列车所受气动阻力的影响,用有限体积法对双层集装箱列车通过隧道时所受的气动阻力进行数值分析.分析结果表明:当列车进入隧道时,所受气动阻力急剧上升,其后,该气动阻力有些波动,但仍保持较高的气动阻力状态,为明线运行时的2～3倍；在同一运行环境下,列车头车所受的气动阻力大于列车中车和尾车所受的气动阻力,而列车中车和尾车所受的气动阻力相差不大；各集装箱车所受的气动阻力分别与列车运行速度的平方、阻塞比成正比；隧道长度对各集装箱车所受气动阻力的影响呈现出非单调性特征.
展开▼
