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Experimental and theoretical study of the pressure waves in railway tunnels with long vented tunnel portals

Heine, Daniela and Ehrenfried, Klaus and Heine, Gerrit and Huntgeburth, Stefan (2018) Experimental and theoretical study of the pressure waves in railway tunnels with long vented tunnel portals. Journal of Wind Engineering and Industrial Aerodynamics, 176, pp. 290-300. Elsevier. ISSN 0167-6105

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Official URL: https://www.sciencedirect.com/science/article/pii/S0167610517303392

Abstract

The aim of this study is to enhance the knowledge of the generation of pressure waves in railway tunnels and to adopt a method of predicting the influence of vented tunnel portals. Pressure waves in railway tunnels generated by the entry of a train into a tunnel entail many disadvantages and therefore have to be reduced. The experimental study was performed at the Tunnel Simulation Facility Göttingen, a moving-model rig. The influence of the train velocity, size and the head length, as well as the influence of the geometry of the tunnel portal and the number and size of portal vents on the pressure waves were investigated regarding the minimisation of the pressure gradient inside the tunnel. The air outflow through the vents was studied using PIV, especially the amount of air leaving the portal through each vent and the geometry of the stream tube. Furthermore, an acoustical analogy was used to predict the pressure-time history inside a model tunnel equipped with the different types of tunnel portals during the passage of the train. Empirical parameters, which are necessary for the estimation, were assessed both theoretically and experimentally. The given theory was adapted to a realistic train with underbody.

Item URL in elib:https://elib.dlr.de/112127/
Document Type:Article
Additional Information:https://www.journals.elsevier.com/journal-of-wind-engineering-and-industrial-aerodynamics
Title:Experimental and theoretical study of the pressure waves in railway tunnels with long vented tunnel portals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Heine, Danieladaniela.heine (at) dlr.deUNSPECIFIED
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deUNSPECIFIED
Heine, Gerritgerrit.heine (at) dlr.deUNSPECIFIED
Huntgeburth, Stefanstefan.huntgeburth (at) dlr.deUNSPECIFIED
Date:May 2018
Journal or Publication Title:Journal of Wind Engineering and Industrial Aerodynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:176
Page Range:pp. 290-300
Publisher:Elsevier
ISSN:0167-6105
Status:Published
Keywords:pressure waves in railway tunnels, tunnel boom, acoustic analogy, moving-model rig
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Fluid Systems, GO
Deposited By: Bachmann, Barbara
Deposited On:27 Jun 2018 11:09
Last Modified:06 Sep 2019 15:28

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