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
相关论文
共 50 条
  • [41] Study on the effect of tunnel dimensions on the smoke layer thickness in naturally ventilated short tunnel fires
    He, Lu
    Xu, Zhisheng
    Markert, Frank
    Zhao, Jiaming
    Xie, En
    Liu, Qiulin
    Tao, Haowen
    Marcial, Sakepa Tagne Sylvain
    Wang, Zhenhua
    Fan, Chuangang
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2021, 112
  • [42] Study on main tunnel temperature distribution and critical velocity of ramp in tunnel fires with longitudinal ventilation
    Zhang, Xinyue
    Zhong, Weipeng
    Tao, Liangliang
    Yuan, Yanping
    Zeng, Yanhua
    APPLIED THERMAL ENGINEERING, 2025, 262
  • [43] Numerical study of the flame geometry of pool fires in longitudinally ventilated tunnels
    Deng, Tao
    Norris, Stuart
    Sharma, Rajnish N.
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2023, 132
  • [44] Effect of blockage ratio on backlayering length of thermal smoke flow in a longitudinally ventilated tunnel
    Meng, Na
    Liu, Xiaomei
    Li, Xiao
    Liu, Beibei
    APPLIED THERMAL ENGINEERING, 2018, 132 : 1 - 7
  • [45] A study of the critical velocity and the confinement velocity of fire accident in a longitudinally ventilated underground train with different door opening scenarios
    Su, Zhihe
    Li, Yanfeng
    Feng, Shan
    Zhong, Hua
    Li, Junmei
    Liu, Wenbo
    Chen, Chao
    Li, Jiaxin
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2023, 131
  • [46] A study on road tunnel fires using Hazmat, with emphasis on critical ventilation velocity
    Palazzi, E
    Currò, F
    Fabiano, B
    PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 2005, 83 (B5) : 443 - 451
  • [47] Theoretical analysis on plane fire plume in a longitudinally ventilated tunnel
    Zhang, Q.
    Guo, X.
    Trussoni, E.
    Astore, G.
    Xu, S.
    Grasso, P.
    TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2012, 30 : 124 - 131
  • [48] Model of critical velocity in a tunnel cross-passage
    School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
    Tiedao Xuebao/Journal of the China Railway Society, 2008, 30 (03): : 87 - 90
  • [49] The influence of ventilation on vehicle fires in large cross-section road tunnel
    Han, X.
    Wang, K. S.
    Li, Z. X.
    ISISS '2007: PROCEEDINGS OF THE INNOVATION AND SUSTAINABILITY OF STRUCTURES, VOLS 1 AND 2, 2008, : 1192 - 1197
  • [50] Application of RANS and LES field simulations to predict the critical ventilation velocity in longitudinally ventilated horizontal tunnels
    Van Maele, Karim
    Merci, Bart
    FIRE SAFETY JOURNAL, 2008, 43 (08) : 598 - 609
12345