Summary
After having evaluated a 3-dimensional Eulerian code’s capability to predict the wavefront’s pressure gradient of the primary pressure waves generated by trains entering a tunnel, SNCF’s Research and Technology Department was assigned to test the tool via a study bearing upon tunnel portal extensions which attenuate the pressure gradient of the entry wavefront. As a first step, taking into account the numerical and computational constraints, the model was sized to permit reasonably quick simulations of many train-tunnel entry cases. As a second step, the parametric study was made on the particular case of the Terranuova le Ville tunnel and served to assess the influence of various geometrical parameters relating to short, flared or perforated tunnel portal extensions.
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References
J.M. Réty and R. Grégoire, “Numerical Simulation of the Pressure Wave generated by a Train Entry in Tunnel” In TRANSAERO Symposium in Paris (France), May 4–5, 1999.
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© 2002 Springer-Verlag Berlin Heidelberg
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Réty, JM., Grégoire, R. (2002). Numerical Investigation of Tunnel Extensions Attenuating the Pressure Gradient Generated by a Train Entering a Tunnel. In: Schulte-Werning, B., Grégoire, R., Malfatti, A., Matschke, G. (eds) TRANSAERO — A European Initiative on Transient Aerodynamics for Railway System Optimisation. Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM), vol 79. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45854-8_20
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DOI: https://doi.org/10.1007/978-3-540-45854-8_20
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