隧道中高速列车空气阻力的水流模型实验

Experimental Investigation of Hydraulic Model for Aerodynamic Drag of High Speed Train in Tunnels

为探求不同隧道设计体型中高速列车的空气阻力变化规律,在保证阻力相似的前提下,以京沪高速铁路南京越江隧道初设方案为原型,用水流代替气流作为流体介质进行了模型实验,给出了SS8型列车通过南京越江隧道时空气阻力的变化规律。实验发现,竖井可以降低空气阻力最多达8.0%;隔墙将增加10.0%左右的空气阻力。建议京沪高速铁路南京越江隧道采用单孔双竖井方案。

In order to find the variety rule of the aerodynamic drag of high-speed train in different type tunnel, instead of air, water is chosen as the fluid medium in this experiment under the condition of resistance similarity. The variety peculiarity of aerodynamic drag for Train SS8 passing through Nanjing Yangtze River Tunnel is presented. Experimental results for Train SS8 show that the vertical shaft can reduce aerodynamic drag to 8% at the most; and the partition wall will increase aerodynamic drag about 10%. It is suggested that the Nanjing Yangtze River Tunnel choose the single turmd with two shafts.