Physics and Engineering Mechanics |
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Full-scale experimental study of a fire under a vehicle in a sloped tunnel |
Yuxuan YANG1,2,Chang LIU1,Peiyun QIU1,3,Zeng LONG1,Maohua ZHONG1,*() |
1. Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China 2. Beijing Key Laboratory of City Integrated Emergency Response Science, Tsinghua University, Beijing 100084, China 3. Guangzhou Metro Group Co., Ltd., Guangzhou 510330, China |
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Abstract Smoke diffusion caused by the stack effect and the blocking effect in a sloped tunnel was investigated in a full-scale fire experiment under a stationary vehicle on an urban rail transit line. The ventilation mode and the vehicle blocking were varied to study the effects of the airflow velocity, the vertical distribution of the smoke temperature, the smoke layer distribution and the smoke spread time. The results show that the ventilation mode and the vehicle blocking both change the flow field near the fire which in turn influences the airflow velocity, smoke distribution and smoke spread time. A smoke spread velocity model was then used to further study the smoke diffusion for various vehicle blocking conditions. The conclusions can guide smoke control design and personnel evacuation plans for such tunnel fire scenarios.
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Keywords
tunnel
slope
blockage
fire
full-scale experiment
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Corresponding Authors:
Maohua ZHONG
E-mail: mhzhong@tsinghua.edu.cn
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Issue Date: 14 October 2020
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1 |
CHEN C K , ZHU C X , LIU X Y , et al. The effect of fuel area size on behavior of fires in a reduced-scale single-track railway tunnel[J]. Tunnelling and Underground Space Technology, 2016. 52, 127- 137.
doi: 10.1016/j.tust.2015.12.002
|
2 |
ZHANG S G , CHENG X D , YAO Y Z , et al. An experimental investigation on blockage effect of metro train on the smoke back-layering in subway tunnel fires[J]. Applied Thermal Engineering, 2016. 99, 214- 223.
doi: 10.1016/j.applthermaleng.2015.12.085
|
3 |
MORANDINI F , SILVANI X , HONORé D , et al. Slope effects on the fluid dynamics of a fire spreading across a fuel bed:PIV measurements and OH* chemiluminescence imaging[J]. Experiments in Fluids, 2014. 55 (8): 1788.
doi: 10.1007/s00348-014-1788-3
|
4 |
HU L H , CHEN L F , WU L , et al. An experimental investigation and correlation on buoyant gas temperature below ceiling in a slopping tunnel fire[J]. Applied Thermal Engineering, 2013. 51 (1-2): 246- 254.
doi: 10.1016/j.applthermaleng.2012.07.043
|
5 |
LIU C , ZHONG M H , SHI C L , et al. Temperature profile of fire-induced smoke in node area of a full-scale mine shaft tunnel under natural ventilation[J]. Applied Thermal Engineering, 2017. 110, 382- 389.
doi: 10.1016/j.applthermaleng.2016.08.147
|
6 |
LIU C , ZHONG M H , TIAN X L , et al. Study on emergency ventilation for train fire environment in metro interchange tunnel[J]. Building and Environment, 2019. 147, 267- 283.
doi: 10.1016/j.buildenv.2018.10.022
|
7 |
LIU C , ZHONG M H , TIAN X L , et al. Experimental and numerical study on fire-induced smoke temperature in connected area of metro tunnel under natural ventilation[J]. International Journal of Thermal Sciences, 2019. 138, 84- 97.
doi: 10.1016/j.ijthermalsci.2018.12.037
|
8 |
LIU C , ZHONG M H , SONG S Y , et al. Experimental and numerical study on critical ventilation velocity for confining fire smoke in metro connected tunnel[J]. Tunnelling and Underground Space Technology, 2020. 97, 84- 97.
url: http://www.sciencedirect.com/science/article/pii/S0886779819313100
|
9 |
ZHONG M H , SHI C L , HE L , et al. Smoke development in full-scale sloped long and large curved tunnel fires under natural ventilation[J]. Applied Thermal Engineering, 2016. 108, 857- 865.
doi: 10.1016/j.applthermaleng.2016.07.141
|
11 |
OKA Y , ATKINSON G T . Control of smoke flow in tunnel fires[J]. Fire Safety Journal, 1995. 25 (4): 305- 322.
doi: 10.1016/0379-7112(96)00007-0
|
12 |
卢欣伶.阻塞比对地铁区间隧道火灾烟气流动特性的影响[D].重庆:重庆大学, 2016.
url: http://cdmd.cnki.com.cn/Article/CDMD-10611-1016908497.htm
|
12 |
LU X L. Effect of blockage ratio on subway tunnel fire smoke flow characteristics[D]. Chongqing: Chongqing University, 2016. (in Chinese)
|
14 |
NFPA. Guide for smoke management systems in malls, atria, and large areas: NFPA 92B-2009[S]. Quincy, MA, USA: National Fire Protection Association, 2009.
|
15 |
ZHONG M H , SHI C L , HE L , et al. Full-scale experimental research on fire fume refluence of sloped long and large curved tunnel[J]. Science China Technological Sciences, 2011. 54 (S1): 89- 94.
doi: 10.1007/s11431-011-4618-3
|
16 |
OKA Y , IMAZEKI O . Temperature and velocity distributions of a ceiling jet along an inclined ceiling-Part 1:Approximation with exponential function[J]. Fire Safety Journal, 2014. 65, 41- 52.
doi: 10.1016/j.firesaf.2013.07.009
|
17 |
中华人民共和国住房和城乡建设部.建筑防烟排烟系统技术标准: GB 51251-2017[S].北京:中国计划出版社, 2018.
|
17 |
Ministry of Housing and Urban-Rural Development of the People's Republic of China. Technical standard for smoke management systems in buildings: GB 51251-2017[S]. Beijing: China Planning Press, 2018. (in Chinese)
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