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Influence of Aerodynamics in Tunnels Design

As shown in the table above, at 50m distance PROTAV detects 120.966dB. This value is less than
detected even though it is in the same order magnitude and is only 1.33% lower. Therefore, and
in view of the results obtained after several analyzes, it can be concluded the great reliability
of the tool in the calculation of this phenomenon

8. Conclusions

Throughout this article a revision of the possibilities of aerodynamic studies in high speed
rail tunnels has been performed, including the opportunities offered to the designer and the
possibilities of optimization of the free cross- section, as well as the possibility of analysis of
variations of speed to improve the operating regimes.
Additionally, it has been presented the PROTAV tool of sonic boom calculation done by INECO in
collaboration with the Instituto Ignacio Da Riba (IDR) of the Polytechnic University of Madrid.
This new tool represents a new possibility of design and calculation of a growing phenomenon
caused by the gradual train speed increments.

9. References

• COMMISSION REGULATION (EU) No 1299/2014 of 18 November 2014 on the technical
specifications for interoperability relating to the ‘infrastructure’ subsystem of the rail
system in the European Union.
• NAP 2-3-1.0 de Túneles de ADIF, Julio 2015.
• UIC Code 779-11. Determination of railway tunnel cross-sectional areas on the basis of
aerodynamic considerations, February 2005.
• DB Netz AG: Infrastrukturseitige Behandlung der Mikrodruckwellen – Thematik, 853.1002ª01.
In Richtlinie 853 Eisenbahntunnel planen, bauen und instand halten, 02.2013.
• Micro-pressure wave countermeasures realized in the Katzenberg tunnel and introduction
of a new German micro-pressure wave regulation. P. Deeg, M. Hieke, C. Gerbig, T. Tielkes.
Proceedings of the 15th International Symposium on Aerodynamics, Ventilation and Fire
(2013).
• ThermoTun 7.1 User Manual. Alan E. Vardy. Dundee Tunnel Research. January 2014.

• Kikuchi, K. Ozawa, S. Takami, H. Iida, M. Continuous pressure waves generated by a Train
Running in a Tunnel. Journal of low frequency noise, vibration and active control 2009.

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