AI Chat Paper
Note: Please note that the following content is generated by AMiner AI. SciOpen does not take any responsibility related to this content.
{{lang === 'zh_CN' ? '文章概述' : 'Summary'}}
{{lang === 'en_US' ? '中' : 'Eng'}}
Chat more with AI
PDF (2.1 MB)
Collect
Submit Manuscript AI Chat Paper
Show Outline
Outline
Show full outline
Hide outline
Outline
Show full outline
Hide outline
Research Article | Open Access

Experimental study on the vertical temperature and thermal stratification for subway station fire

Zeng LongMaohua Zhong( )
Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China
Show Author Information

Abstract

Fire accident seriously threatens the stable operation and personnel security in the subway station, and thermal stratification is an important factor used to determine smoke settlement. Therefore, this paper carried out a series of model experiments by altering the heat release rate (HRR), fire locations, and ventilation conditions. The vertical temperature of the central longitudinal axis was measured, and the S value representing that thermal stratification characteristic was calculated and compared under various fire scenarios. The results showed that the temperature changing curve in the vertical direction was significantly affected by ventilation volume, but it had little to do with the HRR and fire location. The increase of HRR could influence the value of S by enhancing the upper temperature for the whole space and heating the lower temperature near the fire. In addition, the S value decreased with the distance under different longitudinal fire source locations, whereas the variety of S was not monotonical with the deviating transverse distance. And the larger ventilation volume was conducive to restricting smoke diffusion and improving the value of S. This work could provide data support and theoretical reference for controlling smoke stratification under subway station fire.

References

[1]
China Urban Railway Transit Association. Annual Statistics and Analysis Report on Urban Rail Traffic in 2022. 2023. https://www.camet.org.cn/tjxx/11944 (accessed 2023-09-20
[2]

C. Liu, M. H. Zhong, X. L. Tian, et al. Study on emergency ventilation for train fire environment in metro interchange tunnel. Build Environ, 2019, 147: 267–283.

[3]

K. Wang, W. Y. Cai, Y. C. Zhang, et al. Numerical simulation of fire smoke control methods in subway stations and collaborative control system for emergency rescue. Process Saf Environ Prot, 2021, 147: 146–161.

[4]

F. Tang, Q. He, Q. Shi. Experimental study on thermal smoke layer thickness with various upstream blockage-fire distances in a longitudinal ventilated tunnel. J Wind Eng Ind Aerodyn, 2017, 170: 141–148.

[5]

Z. H. Gao, J. Ji, C. G. Fan, et al. Determination of smoke layer interface height of medium scale tunnel fire scenarios. Tunn Undergr Space Technol, 2016, 56: 118–124.

[6]

J. S. Newman. Experimental evaluation of fire-induced stratification. Combust Flame, 1984, 57: 33–39.

[7]

H. Nyman, H. Ingason. Temperature stratification in tunnels. Fire Saf J, 2012, 48: 30–37.

[8]

L. Y. Cooper, M. Harkleroad, J. Quintiere, et al. An experimental study of upper hot layer stratification in full-scale multiroom fire scenarios. J Heat Transfer, 1982, 104: 741–749.

[9]

T. Du, D. Yang, H. B. Wei, et al. Propagation and entrainment of buoyancy-driven flows in a narrow horizontal space and implications for buoyant contaminant transport under natural ventilation. Build Environ, 2018, 132: 214–224.

[10]

D. Yang, S. Dong, M. He, et al. Experimental study on the performance of hybrid ventilation system combining forced longitudinal flow and shaft natural ventilation in tunnels. Tunn Undergr Space Technol, 2020, 103: 103491.

[11]

Y. H. Guo, Z. Y. Yuan, Y. P. Yuan, et al. Numerical simulation of smoke stratification in tunnel fires under longitudinal velocities. Undergr Space, 2021, 6: 163–172.

[12]

S. Gannouni, J. Zinoubi, R. Ben Maad. Numerical study on the thermal buoyant flow stratification in tunnel fires with longitudinal imposed airflow: Effect of an upstream blockage. Int J Therm Sci, 2019, 136: 230–242.

[13]

A. S. Awad, R. K. Calay, O. O. Badran, et al. An experimental study of stratified flow in enclosures. Appl Therm Eng, 2008, 28: 2150–2158.

[14]

W. K. Chow. Determination of the smoke layer interface height for hot smoke tests in big halls. J Fire Sci, 2009, 27: 125–142.

[15]

D. Yang, L. H. Hu, R. Huo, et al. Experimental study on buoyant flow stratification induced by a fire in a horizontal channel. Appl Therm Eng, 2010, 30: 872–878.

[16]

L. J. Li, F. Tang, M. S. Dong, et al. Effect of ceiling extraction system on the smoke thermal stratification in the longitudinal ventilation tunnel. Appl Therm Eng, 2016, 109: 312–317.

[17]

D. F. Huang, S. C. Li. An experimental investigation of stratification characteristic of fire smoke in the corridor under the effect of outdoor wind. J Wind Eng Ind Aerod, 2018, 179: 173–183.

[18]

T. Deng, S. Norris, R. N. Sharma. Numerical investigation on the stability of tunnel smoke stratification under the effect of water spray and longitudinal ventilation. Tunn Undergr Space Technol, 2021, 112: 103901.

[19]

M. Vetter, I. Dinkov, D. Schelb, et al. Experimental study on the effects of sprinkler activation on the stratified smoke layer inside a 36 m2 enclosure. Fire Saf J, 2021, 121: 103313.

[20]

R. Gao, A. G. Li, X. P. Hao, et al. Prediction of the spread of smoke in a huge transit terminal subway station under six different fire scenarios. Tunn Undergr Space Technol, 2012, 31: 128–138.

[21]

F. Liu, Y. Q. Liu, K. Xiong, et al. Experimental and numerical study on the smoke movement and smoke control strategy in a hub station fire. Tunn Undergr Space Technol, 2020, 96: 103177.

[22]

Z. Long, C. Liu, Y. X. Yang, et al. Full-scale experimental study on fire-induced smoke movement and control in an underground double-island subway station. Tunn Undergr Space Technol, 2020, 103: 103508.

[23]
Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Code for design of metro: GB 50157-2013. Beijing (China): China Architecture & Building Press, 2014. (in Chinese)
[24]
Guangzhou Metro Design & Research Institute Co., Ltd. Research and Practice of Guangzhou Metro Line 3 Engineering Design. Beijing (China): China Communication Press, 2011. (in Chinese)
[25]
Guangzhou Metro Design & Research Institute Co., Ltd. Summary of Guangzhou Metro Line 4 Engineering Design. Beijing (China): China Communication Press, 2013. (in Chinese)
[26]
D. R. Lide. CRC Handbook of Chemistry and Physics, 2001–2002. Boca Raton (USA): CRC Press, 2001: pp 5–89.
[27]

C. Liu, M. H. Zhong, X. L. Tian, et al. Experimental and numerical study on fire-induced smoke temperature in connected area of metro tunnel under natural ventilation. Int J Therm Sci, 2019, 138: 84–97.

[28]
L. H. Hu. Studies on thermal physics of smoke movement in tunnel fires. Ph.D. Thesis, Hefei, China: University of Science and Technology of China, 2006. (in Chinese)
[29]

J. Ji, W. Zhong, K. Y. Li, et al. A simplified calculation method on maximum smoke temperature under the ceiling in subway station fires. Tunn Undergr Space Technol, 2011, 26: 490–496.

[30]

Y. Yang, L. Y. Cao. Preparatory study on scenario design for subway fire. J Nat Dis, 2006, 15: 121–125. (in Chinese)

Journal of Intelligent Construction
Pages 9180030-9180030
Cite this article:
Long Z, Zhong M. Experimental study on the vertical temperature and thermal stratification for subway station fire. Journal of Intelligent Construction, 2023, 1(4): 9180030. https://doi.org/10.26599/JIC.2023.9180030
Part of a topical collection:

3101

Views

962

Downloads

0

Crossref

Altmetrics

Received: 25 September 2023
Revised: 09 November 2023
Accepted: 21 November 2023
Published: 27 December 2023
© The Author(s) 2023. Published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Return