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

被引：85
|
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
收藏
页码：303 / 311
页数：9
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