Effect of Longitudinal Ventilation on Smoke Temperature below Utility Tunnel Ceiling

被引:0
作者
Bai, Z. P. [1 ]
Li, Y. F. [1 ]
机构
[1] Beijing Univ Technol, Dept Beijing Key Lab Green Built Environm & Energ, Beijing, Peoples R China
关键词
Experimental study; Temperature distribution; utility tunnel; Ventilation; FIRE;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Utility tunnels are widely built in many cities. When an unexpected fire occurs in the electrical compartment of utility tunnel, the smoke temperature below the utility tunnel ceiling is one of the most important factors for thermal detection and alarm. In this paper, the smoke temperature distribution under the longitudinal ventilation in a utility tunnel fire accident is studied by combining experiment and numerical simulation. The main purpose of this paper is to study the smoke temperature distribution below the ceiling under the effect of longitudinal ventilation in a utility tunnel, and provide guidance for the installation of detector in case of fire. In addition, three important factors such as ventilation velocity, heat release rate and vertical position of fire source are considered respectively. The thermocouple trees are used to measure the temperature along the longitudinal direction of utility tunnel. Results show that the maximum temperature of the utility tunnel is directly above the fire source without longitudinal ventilation. What's more, with the ventilation velocity increases, the maximum temperature below the ceiling gradually moves to the downstream of the fire source in utility tunnel. Finally, a new correlation formula is proposed to predict the temperature distribution of smoke in utility tunnels on the basis of theoretical analysis. The longitudinal temperature distribution obtained by numerical simulation is in good agreement with the experimental tests. Therefore, the research in this paper is helpful to prevent utility tunnel fire and reduce people's property loss.
引用
收藏
页码:939 / 943
页数:5
相关论文
共 18 条
[1]   Experimental and numerical study of fire in a midscale test tunnel [J].
Blanchard, E. ;
Boulet, P. ;
Desanghere, S. ;
Cesmat, E. ;
Meyrand, R. ;
Garo, J. P. ;
Vantelon, J. P. .
FIRE SAFETY JOURNAL, 2012, 47 :18-31
[2]   Assessing governance issues of urban utility tunnels [J].
Canto-Perello, Julian ;
Curiel-Esparza, Jorge .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2013, 33 :82-87
[3]   Analyses of smoke management models in TFT-LCD cleanroom [J].
Chiu, Chen-Wei ;
Chen, Chin-Hui ;
Chen, Jia-Ci ;
Shu, Chi-Min .
BUILDING SIMULATION, 2013, 6 (04) :403-413
[4]  
En-ze Yan, 2018, Procedia Engineering, V211, P861, DOI 10.1016/j.proeng.2017.12.085
[5]   Experimental study on transverse smoke temperature distribution in road tunnel fires [J].
Fan, C. G. ;
Ji, J. ;
Gao, Z. H. ;
Sun, J. H. .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2013, 37 :89-95
[6]  
Fan Y., 2011, IAENG International Journal of Computer Science, V38, P401
[7]   Theoretical and experimental study on longitudinal smoke temperature distribution in tunnel fires [J].
Gong, Liang ;
Jiang, Lin ;
Li, Shuoyu ;
Shen, Na ;
Zhang, Yuchun ;
Sun, Jinhua .
INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2016, 102 :319-328
[8]   Critical wind velocity for arresting upwind gas and smoke dispersion induced by near-wall fire in a road tunnel [J].
Hu, L. H. ;
Peng, W. ;
Huo, R. .
JOURNAL OF HAZARDOUS MATERIALS, 2008, 150 (01) :68-75
[9]   A numerical study on upstream maximum temperature in inclined urban road tunnel fires [J].
Ji, Jie ;
Wan, Huaxian ;
Li, Kaiyuan ;
Han, Jianyun ;
Sun, Jinhua .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2015, 88 :516-526
[10]   Fire properties in near field of square fire source with longitudinal ventilation in tunnels [J].
Kurioka, H ;
Oka, Y ;
Satoh, H ;
Sugawa, O .
FIRE SAFETY JOURNAL, 2003, 38 (04) :319-340