Full Text:   <2066>

Summary:  <1687>

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

 ORCID:

Song-lin Liu

https://orcid.org/0000-0002-5914-2500

Liang Wang

https://orcid.org/0000-0001-8927-5796

-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE A 2021 Vol.22 No.5 P.396-406

http://doi.org/10.1631/jzus.A2000336


Optimization of smoke exhaust efficiency under a lateral central exhaust ventilation mode in an extra-wide immersed tunnel


Author(s):  Song-lin Liu, Liang Wang, Ming-gao Yu, Yong-dong Jiang

Affiliation(s):  State Key Lab of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China

Corresponding email(s):   lw38c@cqu.edu.cn

Key Words:  Tunnel fire, Lateral central smoke exhaust, Supplementary exhaust duct, Large eddy simulation


Share this article to: More <<< Previous Article|

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.

超宽断面沉管隧道侧壁集中排烟模式效率优化

目的:优化超宽断面沉管隧道侧壁集中排烟模式的排烟效率.
创新点:验证了辅助排烟管道的必要性,并对比了两种不同开口的排烟管道的效率.
方法:1. 选取深圳-中山沉管隧道为应用实例,对其进行基于火灾动力学模拟器(FDS)的数值模拟;2. 在模型中,在不改变沉管主体的混凝土结构以及无纵向风的条件下,采用辅助排烟管道,研究其排烟效率;3. 对比两种不同开口的排烟管道的排烟效率.
结论:1. 在无纵向风的情况下,采用辅助排烟管道可使排烟效率从73%提高到98%;2. 当相邻的两个辅助排烟管道之间发生50 MW火灾且纵向风速为2 m/s时,打开两个辅助排烟管道可使排烟效率达88%以上,保证了安全的疏散通道;3. 在超宽的沉管隧道中,增加辅助排烟管道并结合合理的纵向风速是必要的.

关键词:隧道火灾;侧壁集中排烟;辅助排烟管道;大涡模拟

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]An GF, 2017. Technical Guide for Construction of Immersed Tunnel. China Architecture & Building Press, Beijing, China (in Chinese).

[2]Anderson DA, Tannehill JC, Pletcher RH, 1984. Computational Fluid Mechanics and Heat Transfer. McGraw-Hill, New York, USA.

[3]Atkinson GT, Wu Y, 1996. Smoke control in sloping tunnels. Fire Safety Journal, 27(4):335-341.

[4]Carvel RO, Beard AN, Jowitt PW, et al., 2004. The influence of tunnel geometry and ventilation on the heat release rate of a fire. Fire Technology, 40(1):5-26.

[5]Chen JZ, Cao ZM, Zhang Q, 2017. Study on the efficiency of smoke exhausting under lateral exhaust mode in extra-wide immersed tunnel fire. Chinese Journal of Underground Space and Engineering, 13(S1):393-399 (in Chinese).

[6]Chen LF, Hu LH, Tang W, et al., 2013. Studies on buoyancy driven two-directional smoke flow layering length with combination of point extraction and longitudinal ventilation in tunnel fires. Fire Safety Journal, 59:94-101.

[7]Chen LF, Hu LH, Zhang XL, et al., 2015. Thermal buoyant smoke back-layering flow length in a longitudinal ventilated tunnel with ceiling extraction at difference distance from heat source. Applied Thermal Engineering, 78:129-135.

[8]Hu LH, 2006. Studies on Thermal Physics of Smoke Movement in Tunnel Fires. PhD Thesis, University of Science and Technology of China, Hefei, China (in Chinese).

[9]Hu LH, Peng W, Huo R, 2008. Critical wind velocity for arresting upwind gas and smoke dispersion induced by near-wall fire in a road tunnel. Journal of Hazardous Materials, 150(1):68-75.

[10]Ingason H, Li YZ, 2011. Model scale tunnel fire tests with point extraction ventilation. Journal of Fire Protection Engineering, 21(1):5-36.

[11]Jiang SP, 2018. Key Technology of Disaster Prevention and Mitigation for Offshore Extra-long Immersed Tunnels. China Communications Press, Beijing, China (in Chinese).

[12]Karlsson B, Quintiere JQ, 1999. Enclosure Fire Dynamics. CRC Press, Boca Raton, USA.

[13]Lee EJ, Oh CB, Oh KC, et al., 2010. Performance of the smoke extraction system for fires in the Busan–Geoje immersed tunnel. Tunnelling and Underground Space Technology, 25(5):600-606.

[14]Lee SR, Ryou HS, 2006. A numerical study on smoke movement in longitudinal ventilation tunnel fires for different aspect ratio. Building and Environment, 41(6):719-725.

[15]Li LJ, Tang F, Dong MS, et al., 2016. Effect of ceiling extraction system on the smoke thermal stratification in the longitudinal ventilation tunnel. Applied Thermal Engineering, 109:312-317.

[16]Li YZ, Lei B, Ingason H, 2010. Study of critical velocity and backlayering length in longitudinally ventilated tunnel fires. Fire Safety Journal, 45(6-8):361-370.

[17]Lin CJ, Chuah YK, 2008. A study on long tunnel smoke extraction strategies by numerical simulation. Tunnelling and Underground Space Technology, 23(5):522-530.

[18]McGrattan K, Hostikka S, McDermott R, et al., 2013a. Fire Dynamics Simulator Technical Reference Guide. Volume 1: Mathematical Model. NIST Special Publication 1018, National Institute of Standards and Technology, Washington, USA.

[19]McGrattan K, McDermott R, Weinschenk C, et al., 2013b. Fire Dynamics Simulator: User’s Guide. NIST Special Publication 1019, National Institute of Standards and Technology, Washington, USA.

[20]Mei FZ, Tang F, Ling X, et al., 2017. Evolution characteristics of fire smoke layer thickness in a mechanical ventilation tunnel with multiple point extraction. Applied Thermal Engineering, 111:248-256.

[21]MOH (Ministry of Health of the People’s Republic of China), 2007. Occupational Exposure Limits for Hazardous Agents in the Workplace. Part 1: Chemical Hazardous Agents, GBZ 2.1-2007. MOH, Beijing, China (in Chinese).

[22]NASEM (National Academies of Sciences, Engineering, and Medicine), 2011. Design Fires in Road Tunnels. The National Academies Press, Washington, USA, p.17-19.

[23]Oka Y, Atkinson GT, 1995. Control of smoke flow in tunnel fires. Fire Safety Journal, 25(4):305-322.

[24]Patterson NM, 2002. Assessing the Feasibility of Reducing the Grid Resolution in FDS Field Modelling. Fire Engineering Research Report 02/12, University of Canterbury, Christchurch, New Zealand.

[25]Song SY, Guo J, Su QK, et al., 2020. Technical challenges in the construction of bridge-tunnel sea-crossing projects in China. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 21(7):509-513.

[26]Tanaka F, Takezawa K, Hashimoto Y, et al., 2018. Critical velocity and backlayering distance in tunnel fires with longitudinal ventilation taking thermal properties of wall materials into consideration. Tunnelling and Underground Space Technology, 75:36-42.

[27]Tang F, He Q, Mei FZ, et al., 2018. Effect of ceiling centralized mechanical smoke exhaust on the critical velocity that inhibits the reverse flow of thermal plume in a longitudinal ventilated tunnel. Tunnelling and Underground Space Technology, 82:191-198.

[28]Thomas PH, 1968. The movement of smoke in horizontal passages against air flow. Fire Research Technical Paper, 7(1):1-8.

[29]Vauquelin O, Mégret O, 2002. Smoke extraction experiments in case of fire in a tunnel. Fire Safety Journal, 37(5):525-533.

[30]Vianello C, Fabiano B, Palazzi E, et al., 2012. Experimental study on thermal and toxic hazards connected to fire scenarios in road tunnels. Journal of Loss Prevention in the Process Industries, 25(4):718-729.

[31]Wang HY, 2012. Numerical and theoretical evaluations of the propagation of smoke and fire in a full-scale tunnel. Fire Safety Journal, 49:10-21.

[32]Wu Y, Bakar MZA, 2000. Control of smoke flow in tunnel fires using longitudinal ventilation systems–a study of the critical velocity. Fire Safety Journal, 35(4):363-390.

[33]Xu L, 2007. Theoretical Analysis and Experimental Study on Smoke Control in Long Highway Tunnels. PhD Thesis, Tongji University, Shanghai, China (in Chinese).

[34]Yang D, Hu LH, Huo R, et al., 2010. Experimental study on buoyant flow stratification induced by a fire in a horizontal channel. Applied Thermal Engineering, 30(8-9):872-878.

[35]Yi L, Wei R, Peng JZ, et al., 2015. Experimental study on heat exhaust coefficient of transversal smoke extraction system in tunnel under fire. Tunnelling and Underground Space Technology, 49:268-278.

Open peer comments: Debate/Discuss/Question/Opinion

<1>

Please provide your name, email address and a comment





Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE