Moving Model Test of Express Container Car Passing through a Tunnel
This paper describes the moving scaled-model test of express container car passing through a tunnel on moving model rig where its scale is 1/17.6 and the length of the tunnel is 888.8m and the section area of the tunnel is 80 square meter and the interval of two truck is 4.4m in full-scaled model. The tests include that the container car passing though a tunnel with its speed are 120, 140,160 and 176km/h separately and its lowest Renolds number. The results show that the figure of the pressure wave on the car body is almost the same when train is in tunnel with different speed and that the amplitude of the pressure wave is proportion to the square of the train speed. The pressure on the car is always negative when train is in tunnel while the pressure on the wall of tunnel alternate between positive and negative. The coefficient of pressure wave on the car body is -0.7 and the peak values of pressure coefficient of point on tunnel are 0.6 and -0.7. The amplitude of the pressure wave on the car decreases according to logarithmic law nearly. The amplitude of the micro pressure wave is proportion to the cubic of the car speed.
Chaohe Chen, Yong Huang and Guangfan Li
G. J. Gao et al., "Moving Model Test of Express Container Car Passing through a Tunnel", Advanced Materials Research, Vols. 243-249, pp. 3456-3462, 2011