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Mathematical Problems in Engineering
Volume 2018, Article ID 1329187, 13 pages
https://doi.org/10.1155/2018/1329187
Research Article

Numerical Investigation of Particle Concentration Distribution Characteristics in Twin-Tunnel Complementary Ventilation System

1School of Highway, Chang’an University, Xi’an 710064, China
2China Railway Siyuan Survey and Design Group Co., Ltd, Wu’han 430063, China
3School of Civil & Construction Engineering, Oregon State University, 101 Kearney Hall, Corvallis, OR 97331, USA

Correspondence should be addressed to Xiuling Wang; nc.ude.dhc@gniluixgnaw

Received 6 January 2018; Revised 2 June 2018; Accepted 20 June 2018; Published 12 July 2018

Academic Editor: Babak Shotorban

Copyright © 2018 Rui Ren et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Longitudinal ventilation systems are commonly installed in new tunnels. In this paper, based on the similarity law, the scale model with a view to different conditions is carried out to study the effectiveness of twin-tunnel complementary ventilation system. The system can offer enough amount of fresh air to meet requirement of driving safety by using longitudinal ventilation without ventilation shaft. Field measurements were also performed to validate the numerical model. Results reveal that particle concentration distribution is influenced by the distance from air interchange cross-passages to uphill tunnel inlet () and the flow volume of air interchange cross () passage and jet fan thrust () in tunnel. And is the most important factor about influencing the ventilation efficiency.