Summary
Following the setting-up of a TRANSAERO database based on both full-scale measurements- conducted with an ETR 500/92 trainset in a tunnel located in Italy on the Diretissima high speed rail link- and 1/25th measurements -conducted on the Moving Model Rig (MMR) in Derby, UK-the SNCF Research and Technology Department undertook the validation of the TRANSTUN one-dimensional computer program.
Comparisons were made between simulated pressure fluctuations in tunnels and actual measurements at fixed locations inside the 2.7 km long full-scale tunnel and also the 30 m long MMR model of the same tunnel. The well-known phase difference between measured and computed pressure wave movements was observed, being particularly emphasised in the reduced-scale case. In order to improve predictions, a methodology for using the existing version of the TRANSTUN program is proposed and validated pending future theoretical developments.
Besides, in the full-scale case, the internal pressure fluctuations of the pressure-sealed high-speed ETR 500/92 trainset presented interesting features that could be rather accurately simulated only when taking into account, in addition to the classical leakage effect, both the open communications between the trainset’s coaches and a car-body compressibility character.
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© 2002 Springer-Verlag Berlin Heidelberg
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William-Louis, M.JP., Grégoire, R. (2002). 1-d Calculations of Pressure Fluctuations Outside and Inside a Pressure Sealed High-Speed Trainset Travelling through Tunnels. 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_27
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DOI: https://doi.org/10.1007/978-3-540-45854-8_27
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