CLC number: U458.1
On-line Access: 2021-05-12
Received: 2020-07-30
Revision Accepted: 2020-12-13
Crosschecked: 2021-04-07
Cited: 0
Clicked: 3073
Citations: Bibtex RefMan EndNote GB/T7714
Song-lin Liu, Liang Wang, Ming-gao Yu, Yong-dong Jiang. Optimization of smoke exhaust efficiency under a lateral central exhaust ventilation mode in an extra-wide immersed tunnel[J]. Journal of Zhejiang University Science A, 2021, 22(5): 396-406.
@article{title="Optimization of smoke exhaust efficiency under a lateral central exhaust ventilation mode in an extra-wide immersed tunnel",
author="Song-lin Liu, Liang Wang, Ming-gao Yu, Yong-dong Jiang",
journal="Journal of Zhejiang University Science A",
volume="22",
number="5",
pages="396-406",
year="2021",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2000336"
}
%0 Journal Article
%T Optimization of smoke exhaust efficiency under a lateral central exhaust ventilation mode in an extra-wide immersed tunnel
%A Song-lin Liu
%A Liang Wang
%A Ming-gao Yu
%A Yong-dong Jiang
%J Journal of Zhejiang University SCIENCE A
%V 22
%N 5
%P 396-406
%@ 1673-565X
%D 2021
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2000336
TY - JOUR
T1 - Optimization of smoke exhaust efficiency under a lateral central exhaust ventilation mode in an extra-wide immersed tunnel
A1 - Song-lin Liu
A1 - Liang Wang
A1 - Ming-gao Yu
A1 - Yong-dong Jiang
J0 - Journal of Zhejiang University Science A
VL - 22
IS - 5
SP - 396
EP - 406
%@ 1673-565X
Y1 - 2021
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A2000336
Abstract: This study focused on increasing the efficiency of the smoke exhaust system of an extra-wide (eight-lane, dual-directional) immersed tunnel with a specific quantity of exhaust. The Shenzhen–Zhongshan immersed tunnel was selected as the application example. A numerical simulation based on fire dynamics simulator was conducted. In the model, the concrete structure of the main body of the immersed tubes was not altered. The adoption of supplementary exhaust ducts increased the efficiency from 73% to 98% under the condition of no longitudinal wind. When a 50-MW fire occurred between two adjacent ducts, with a longitudinal wind velocity of 2 m/s, the efficiency reached 88% or more when the two ducts were opened. Furthermore, a safety evacuation path was developed. The results suggest that the addition of supplementary exhaust ducts combined with a rational longitudinal wind velocity is necessary for an extra-wide immersed tunnel.
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