NAFEMS International Journal of CFD Case Studies

Volume 12, February 2020

ISSN 1462-236X
ISBN 978-1-910643-94-5

Pressure Fluctuations in Railway Tunnels

Rodríguez¹, Luis Lacoma¹ and Joaquín Martí^1
1Principia

https://doi.org/10.59972/vjy6fz48

Keywords: Compressible Flow, Pressure Wave, Numerical Simulation, Railway, Tunnel

Abstract

When high-speed trains enter and exit tunnels, major pressure transients are produced, which travel in the form of waves along the tunnel and are reflected at the portals. Guidelines and regulations limit the pressure changes felt inside the cars to ensure the health and aural comfort of the passengers. The authors developed a one-dimensional program, based on the method of characteristics, to carry out the necessary calculations. After validating the program against results from other codes, including full 3-D CFD calculations, they used it to confirm the design of a tunnel for high-speed rail traffic.

References

[1] Union Internationale de Chemins de Fer (2005), UIC-779-11: Determination of Railway Tunnel Cross-Sectional Areas on the Basis of Aerodynamic Considerations, Ed. 2.

[2] Union Internationale de Chemins de Fer (2002), UIC-660: Measures to Ensure the Technical Compatibility of High-Speed Trains, Ed. 2.

[3] Adif (2011), Instrucciones Generales para los Proyectos de Plataforma (IGP). IGP-4: Túneles, version 2, June.

[4] DTR – Dundee Tunnel Research (2017), ThermoTun Software, http://www.thermotun.com/index.htm.

[5] Vardy, A.E. and Tijsseling, A.S. (2015), Method of Characteristics: (Why) is it so good?, BHR Group.

[6] Saito, S., Iida, M., Kajiyama, H., (2011), Numerical Simulation of 1-D Unsteady Compressible Flow in Railway Tunnels, Journal of Environment and Engineering, Volume 6, Issue 4, Pages 723-738, Online ISSN 1880-988X, https://doi.org/10.1299/jee.6.723

[7] SIMULIA (2017) “XFlow 2017 User’s Guide”.

Cite this paper

Javier Rodríguez, Luis Lacoma, Joaquín Martí, Pressure Fluctuations in Railway Tunnels, NAFEMS International Journal of CFD Case Studies, Volume 12, 2020, Pages 5-19, https://doi.org/10.59972/vjy6fz48