Effect of cross section on critical velocity in longitudinally ventilated tunnel fires

被引：86

作者：

Li, Ying Zhen ^{[1
]}

Ingason, Haukur ^{[1
]}

机构：

[1] RISE Res Inst Sweden, Safety & Transport Fire Res, Box 857, SE-50115 Boras, Sweden

来源：

FIRE SAFETY JOURNAL | 2017年 / 91卷

关键词：

Critical velocity; Tunnel fires; Longitudinal ventilation; Smoke control; SMOKE CONTROL; FLOW; BEHAVIOR; RELEASE; LENGTH; GAS;

D O I：

10.1016/j.firesaf.2017.03.069

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Numerical and theoretical work was conducted to investigate the effect of tunnel cross section on critical velocity for smoke control in longitudinally ventilated tunnel fires. The results show that for small fires, the critical velocity decreases with both the increasing tunnel height and tunnel width. For large fires, the critical velocity significantly increases with the increasing tunnel height but is independent of tunnel width. Different calculation models are compared with a focus on effect of tunnel cross section. A new correlation is proposed to account for the effect of tunnel width based on the previous model.

引用

页码：303 / 311

页数：9

共 50 条

[21] The critical ventilation velocity in tunnel fires - a computer simulation
Hwang, CC
Edwards, JC
FIRE SAFETY JOURNAL, 2005, 40 (03) : 213 - 244
[22] The critical ventilation velocity for transverse double fires in tunnel
Zhang, Q.
Pei, G.
MAGAZINE OF CIVIL ENGINEERING, 2019, 85 (01): : 39 - 50
[23] Critical ventilation velocity for tunnel fires occurring near tunnel exits
Tsai, Kuang-Chung
Lee, Yee-Ping
Lee, Shin-Ku
FIRE SAFETY JOURNAL, 2011, 46 (08) : 556 - 557
[24] Evaluating the impact of tunnel slope on critical velocity and confinement velocity in metro tunnel carriage fires
Su, Zhihe
Li, Yanfeng
Zhong, Hua
Li, Junmei
Li, Boyu
Kang, Siyan
Huang, Youbo
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2024, 154
[25] Experimental study on flame merging behaviors and smoke backlayering length of two fires in a longitudinally ventilated tunnel
Meng, Na
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2023, 137
[26] An experimental study of the effect of the aspect ratio on the critical velocity in longitudinal ventilation tunnel fires
Lee, SR
Ryou, HS
JOURNAL OF FIRE SCIENCES, 2005, 23 (02) : 119 - 138
[27] Effect of tunnel slope on the critical velocity of densimetric plumes and fire plumes in ventilated tunnels
Jiang, Lei
Xiao, Ming
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2022, 123
[28] Experimental study and machine learning on the maximum temperature beneath tunnel ceiling induced by adjacent tandem fires in longitudinally ventilated tunnel
Liu, Wei
Deng, Lei
Li, Haoran
Li, Xuechun
Shi, Congling
Meng, Na
Tang, Fei
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2023, 187
[29] A novel representation of the critical ventilation velocity for mitigating tunnel fires
Khattri, S. K.
Log, T.
Kraaijeveld, A.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2021, 112
[30] A novel representation of the critical ventilation velocity for mitigating tunnel fires
Khattri, S.K.
Log, T.
Kraaijeveld, A.
Tunnelling and Underground Space Technology, 2021, 112

← 1 2 3 4 5 →