Effects of fire source position on smoke extraction efficiency by natural ventilation through a board-coupled shaft during tunnel fires

2019 ◽  
Vol 37 (3) ◽  
pp. 3975-3984 ◽  
Author(s):  
Haiyong Cong ◽  
Xishi Wang ◽  
Xiangxiao Kong ◽  
Hongli Xu
Keyword(s):  
Natural Ventilation ◽  
Extraction Efficiency ◽  
Source Position ◽  
Tunnel Fires ◽  
Fire Source

Effect of the blockage ratio on the smoke extraction efficiency in tunnel fires with natural ventilation

2021 ◽  
Vol 117 ◽  
pp. 104165
Author(s):  
Jie Wang ◽  
Yongjie Fan ◽  
Yinqiu Wei ◽  
Xuepeng Jiang ◽  
Kaihua Lu
Keyword(s):  
Natural Ventilation ◽  
Extraction Efficiency ◽  
Blockage Ratio ◽  
Tunnel Fires

Experimental and Theoretical Study for Tunnel Fires with Natural Ventilation

2013 ◽  
Vol 51 (3) ◽  
pp. 691-706 ◽  
Author(s):  
Zhongyuan Yuan ◽  
Bo Lei ◽  
Ahmed Kashef
Keyword(s):  
Natural Ventilation ◽  
Theoretical Study ◽  
Tunnel Fires

INFLUENCE OF THE FIRE SOURCE POSITION ON THE HOT GAS LAYER TEMPERATURE IN A MULTI-COMPARTMENT SCENARIO

2020 ◽  
Author(s):  
Rodolfo Prediger Helfenstein ◽  
Calisa Katiuscia Lemmertz ◽  
Felipe Roman Centeno
Keyword(s):  
Source Position ◽  
Hot Gas ◽  
Fire Source ◽  
Gas Layer

Dynamic Simulation on Longitudinal Temperature Distribution of Tunnel Ceiling Based on Moving Fire Source

2012 ◽  
Vol 610-613 ◽  
pp. 752-761
Author(s):  
Jun Deng ◽  
Shi Rong Li ◽  
Zheng Xin Yan
Keyword(s):  
Temperature Distribution ◽  
Dynamic Simulation ◽  
Natural Ventilation ◽  
Early Stage ◽  
Influential Factors ◽  
Simulation Software ◽  
Road Tunnel ◽  
Moving Vehicle ◽  
Fire Source ◽  
Longitudinal Temperature

Several tunnel fires were caused by the fire source loaded in moving vehicle. The physical model was designed based on real road tunnel to simulate the distribution of longitudinal temperature. Through fire dynamic simulation software FDS, the fire processes when moving vehicle stabilized and traveled at 10m/s and 15m/s in tunnel were simulated under natural ventilation of 2.7m/s. The purpose of research includes three aspects, first, the temperature field in the early stage when moving fire travels into tunnel; second, influence of moving fire on the longitudinal temperature distribution; third, explores the change of temperature peak and its influential factors when vehicles stops and combustion stabilizes. Simulation indicates that the airflow filed movement induced by moving fire to certain degree blocks the spread of heat released in the direction opposite to fire movement and it also entrains high temperature airflow into its movement. When ventilation direction is accordant with vehicle moving direction, the stabilized value of highest temperature point of ceiling tends to be higher than that when the directions are opposite.

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