A study on the temperature profile of bifurcation tunnel fire under natural ventilation

被引：1
作者：
Zhao, Jianlong [1 ]
Li, Yanfeng [1 ]
Li, Junmei [1 ]
Li, Jiaxin [1 ]
机构：
[1] Beijing Univ Technol, Beijing Key Lab Green Built Environm & Energy Eff, Beijing, Peoples R China
来源：
PLOS ONE | 2022年 / 17卷 / 01期
关键词：
SMOKE TEMPERATURE; METRO TUNNEL; MOVEMENT; AREA; ROAD;
D O I：
10.1371/journal.pone.0262546
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This study simulated a series of bifurcation tunnel fire scenarios using the numerical code to investigate the temperature profile of bifurcation tunnel fire under natural ventilation. The bifurcation tunnel fire scenarios considered three bifurcation angles (30 degrees, 45 degrees, and 60 degrees) and six heat release rates (HRRs) (5, 10, 15, 20, 25, and 30 MW). According to the simulation results, the temperature profile with various HRRs and bifurcation angles was described. Furthermore, the effects of bifurcation angles and HRRs on the maximum temperature under the bifurcation tunnel ceiling and the temperature decay along the longitudinal direction of the branch were investigated. According to the theoretical analysis, two prediction models were proposed. These models can predict a bifurcation tunnel fire's maximum temperature and longitudinal temperature decay in the branch. The results of this study could be valuable for modelling a bifurcation tunnel fire and benefit the fire engineering design of bifurcation tunnels.
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收藏
页数：22
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