Study on Optimization of Tunnel Ventilation Flow Field in Long Tunnel Based on CFD Computer Simulation Technology

Song Yang, Zubin Ai, Chao Zhang, Shun Dong, Xun Ouyang, Rong Liu () and Ping Zhang
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Song Yang: Power China Road Bridge Group Co., Ltd., Beijing 100048, China
Zubin Ai: Power China Road Bridge Group Co., Ltd., Beijing 100048, China
Chao Zhang: Power China Road Bridge Group Co., Ltd., Beijing 100048, China
Shun Dong: Power China Road Bridge Group Co., Ltd., Beijing 100048, China
Xun Ouyang: Power China Road Bridge Group Co., Ltd., Beijing 100048, China
Rong Liu: School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
Ping Zhang: School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China

Sustainability, 2022, vol. 14, issue 18, 1-15

Abstract: With the rapid development of tunnel construction, more and more long tunnels are being designed and built. In contrast to ordinary tunnels, long tunnels are characterized by large construction distances and difficult ventilation. In this study, gallery ventilation systems in the construction of long tunnels were studied. Combined with the CFD software FLUENT, a three-dimensional model of tunnel ventilation of a double tunnel was established, and a numerical simulation analysis of the ventilation flow field was carried out and optimized the flow field of gallery ventilation. We found that the main circulation air flow of gallery ventilation was formed by the jet fan, which was installed near the air flow-in tunnel. We also determined the main factors that affect the ventilation effect in gallery ventilation, including the wind wall formed by the high-speed airflow at the cross-aisle and found that the draft fan in front of the cross-aisle could eliminate the wind wall and improve the ventilation effect. The influence of the location and type of the draft fan on the elimination of air flow structure was studied, and the best fan layout scheme suitable for the site was determined. The ventilation scheme of the tunnel was optimized.

Keywords: long tunnels; gallery ventilation system; numerical simulation; ventilation optimization (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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