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.
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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
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 136 • Issue 9 • September 2010
Pages: 846 - 853
Copyright
© 2010 ASCE.
History
Received: Jan 20, 2009
Accepted: Jan 28, 2010
Published online: Jan 30, 2010
Published in print: Sep 2010
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