Aerodynamic Effects Caused by Trains Entering Tunnels
Publication: Journal of Transportation Engineering
Volume 136, Issue 9
Abstract
With the increase in train speed, the aerodynamics in tunnels is emerging. In recent years, we have carried out a few full-scale tests about tunnel aerodynamics, and the law of influence of train speed on pressure change, airflow velocity, and micropressure wave are obtained, and a passenger comfort survey was conducted. When a high-speed train enters a tunnel at 200 km/h, the pressure change amplitude and pressure change per second inside the vehicle are 1,036 Pa and 273 Pa/s, respectively, and 88.9% people experienced no obvious discomfort; the airflow velocity in the tunnel is 14.8 m/s, which exceeds the criterion, 14 m/s. Therefore, it is suggested that workers should not work in the tunnel when a train passes; because the micropressure wave is only 9.7 Pa at the measured point, 20 m from the exit port of tunnel, the tunnel has a cross section enlarged hood with windows, and the passing train does not impact the environment near the tunnel.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This work has been sponsored by China Railway Department. Thanks to Professor Hongqi Tian and Professor Xifeng Liang for their useful comments and suggestions on the work. The financial support of the Key Laboratory for Track Traffic Safety of Ministry of Education is gratefully acknowledged.
References
Auvity, B., Bellenoue, M., and Kageyama, T. (2001). “Experimental study of unsteady aerodynamic field outside a tunnel during a train entry.” Exp. Fluids, 30(2), 221–228.
Bellenoue, M., Moriniere, V., and Kageyama, T. (2002). “Experimental 3-D simulation of the compression wave due to train-tunnel entry.” J. Fluids Struct., 16(5), 581–595.
Howe, M. S. (2005). “On the role of separation in compression wave generation by a train entering a tunnel hood with a window.” LMA Journal of Applied Mathematics, 70(1), 400–418.
Liu, T. -H., Liang, X. -F., and Tian, H. -Q. (2007). “Research report of aerodynamics in the tunnels of 200 km/h on Chongqing-Suining railway line.” Central South Univ., Changsha.
Wang, W., Wang, J. -Y., and Chen, Z. -L. (1998). “Safe dodging distances for people in high-speed railway tunnels.” Journal of Sichuan Union University, 2(6), 34–39.
Wang, Y. -X., and Gao, B. (2003). “New development of the aerodynamics of high-speed trains passing in and out tunnels.” China Railway Science, 24(2), 83–88.
Xu, H. -S., He, D. -Z., and Wang, H. -X. (1996). “A study on the safe clearance for persons from running quasi-high-speed train.” China Railway Science, 17(1), 21–31.
Yu, N. -Y., and Mei, Y. -G. (2003). “Study on main parameters effecting pressure transients while train passing through tunnel.” China Railway Science, 24(6), 67–69.
Information & Authors
Information
Published In
Copyright
© 2010 ASCE.
History
Received: Jan 20, 2009
Accepted: Jan 28, 2010
Published online: Jan 30, 2010
Published in print: Sep 2010
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.