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Cross, D., Hughes, B., Ingham, D. et al. (1 more author) (2015) A validated numerical investigation of the effects of high blockage ratio and train and tunnel length upon underground railway aerodynamics. Journal of Wind Engineering and Industrial Aerodynamics, 146. pp. 195-206. ISSN 0167-6105
Abstract
In order to ensure the safety and comfort of passengers and staff, an underground railway requires an extensive ventilation and cooling system. One mechanism for underground railway ventilation is the movement of air induced by trains, termed the ‘piston effect’. This study investigated the effect of altering the blockage ratio of an underground train upon the ventilating air flows driven by a train. First a computational model was developed and validated with experimental data from literature. This model was scaled to represent an operational underground railway with high blockage ratio and the blockage ratio varied to evaluate the effects upon ventilation. The results of this study show that ventilating air flows can be increased significantly during periods of constant train motion and acceleration, by factors of 1.4 and 2 respectively, but that the train drag will increase at the same rate. During deceleration negligible increases in ventilation flows are found but drag increases by a factor of 4.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015 Elsevier. This is an author produced version of a paper subsequently published in Journal of Wind Engineering and Industrial Aerodynamics. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/) |
Keywords: | Underground railways; Aerodynamics; High blockage ratio; Ventilation; Computational fluid dynamics |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 25 Feb 2016 11:21 |
Last Modified: | 02 Nov 2017 01:17 |
Published Version: | https://dx.doi.org/10.1016/j.jweia.2015.09.004 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.jweia.2015.09.004 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:95602 |
Available Versions of this Item
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A validated numerical investigation of the effects of high blockage ratio and train and tunnel length upon underground railway aerodynamics. (deposited 07 Oct 2015 13:08)
- A validated numerical investigation of the effects of high blockage ratio and train and tunnel length upon underground railway aerodynamics. (deposited 25 Feb 2016 11:21) [Currently Displayed]