Mechanism of spillage plumes from multiple openings on ceiling temperature distribution in metro tunnel fires based on superposition principle

被引:0
作者
Su, Zhihe [1 ]
Li, Yanfeng [1 ]
Luo, Runzhou [2 ,3 ]
Zhong, Hua [4 ]
Li, Junmei [1 ]
Geng, Zhihao [1 ]
Guo, Zhicheng [1 ]
机构
[1] Beijing Univ Technol Beijing, Beijing Key Lab Green Built Environm & Energy Effi, Beijing, Peoples R China
[2] Dalian Univ Technol, DUT Sch Software Technol, Dalian, Peoples R China
[3] Dalian Univ Technol, DUT RU Int Sch Informat Sci & Engn, Dalian, Peoples R China
[4] London South Bank Univ, Coll Technol & Environm, 103 Borough Rd, London SE1 0AA, England
基金
北京市自然科学基金;
关键词
Tunnel; Metro fire; Ceiling temperature distribution; Multiple openings; Superposition principle; SMOKE TEMPERATURE; FLOW;
D O I
10.1016/j.tust.2025.106412
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This study revisits the coupling effects of tunnel ceiling temperature distribution caused by plume escapes from metro carriage doors during a fire. The impact of fire heat release rates on the ceiling temperature distribution under various door-opening scenarios was analysed by utilising the superposition principle. The concept of virtual fire sources was proposed to model the ceiling temperature distribution associated with plume outflows from carriage doors. The results indicate that the ceiling temperature distribution in a metro tunnel fire is primarily influenced by virtual fire sources generated by plumes escaping through multiple doors. The maximum ceiling temperature from a single virtual fire source was significantly lower than that of a real fire, and the temperature decay followed a double exponential function. The heat flow ratio for each door remained nearly constant for different fire heat release rates, and variations in heat flow with door positions were analysed. The incorporation of heat loss terms into the theoretical model improved the accuracy and quantification of heat loss coefficients. A predictive model for the ceiling temperature distribution caused by metro carriage fires was developed based on the superposition principle, with the predictions well aligning with the experimental results. This study enhances our understanding of the ceiling temperature distribution in multi-opening structures and guides scenarios involving multiple fire sources within tunnels.
引用
收藏
页数:12
相关论文
共 45 条
[1]   Experimental investigation on the effect of asymmetrical sealing on tunnel fire behavior [J].
Chen Chang-kun ;
Zhu Cong-xiang ;
Liu Xuan-ya ;
Yu Nian-hao .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 92 :55-65
[2]   Experimental study on temperature profile and critical velocity in bifurcated tunnel fire with inclined transverse cross-passage [J].
Chen, Changkun ;
Lu, Tong ;
Zhang, Yulun ;
Shi, Congling ;
Jiao, Weibing .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2023, 186
[3]   Experimental study on the longitudinal temperature decay beneath ceiling in ventilated tunnel fires [J].
Chen, Lei ;
Tang, Fei .
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2020, 139 (05) :3179-3184
[4]   Study on Smoke Propagation Characteristics of a Carriage Fire in Longitudinally Ventilated Tunnel [J].
Cong, Wei ;
Cheng, Xudong ;
Shi, Long ;
He, Kun .
FIRE TECHNOLOGY, 2024, 60 (03) :2231-2247
[5]   Experimental study on temperature characteristics in a subway train carriage with lateral openings in a longitudinally ventilated tunnel [J].
Cong, Wei ;
He, Kun ;
Yang, Hui ;
Shi, Long ;
Cheng, Xudong .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2023, 131
[6]   Numerical study on the ceiling gas temperature in a subway train with different fire locations [J].
Cong, Wei ;
Shi, Long ;
Shi, Zhicheng ;
Peng, Min ;
Yang, Hui ;
Cheng, Xudong .
BUILDING SIMULATION, 2022, 15 (04) :549-560
[7]   Effect of train fire location on maximum smoke temperature beneath the subway tunnel ceiling [J].
Cong, Wei ;
Shi, Long ;
Shi, Zhicheng ;
Peng, Min ;
Yang, Hui ;
Zhang, Shaogang ;
Cheng, Xudong .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2020, 97
[8]   Simulation Study on Fire Product Movement Law and Evacuation in a University High-Rise Teaching Building [J].
Cui, Yan ;
Wang, Hao ;
You, Bo ;
Cheng, Chuan ;
Li, Ming .
APPLIED SCIENCES-BASEL, 2023, 13 (18)
[9]   Study of temperature distribution and smoke movement by mobile ventilation during emergency rescue in tunnel fires [J].
Ding, Yanming ;
Mei, Jiaoxin ;
Zhang, Jiaqing ;
Li, Xiang ;
Lu, Kaihua ;
Li, Changhai .
THERMAL SCIENCE AND ENGINEERING PROGRESS, 2023, 46
[10]  
Fulmali A.O., 2021, Mater. Today:. Proc., V47, P3263