Critical ventilation velocity in large cross-section road tunnel fire

2008 ◽  
Author(s):  
K Wang ◽  
Z Li ◽  
X Han
Keyword(s):  
Cross Section ◽  
Large Cross Section ◽  
Road Tunnel ◽  
Tunnel Fire ◽  
Ventilation Velocity

Simulation Analysis on Smoke Characteristics of Tunnel Fire with Different Cross Passage Interval

2011 ◽  
Vol 271-273 ◽  
pp. 1003-1008 ◽  
Author(s):  
Xin Han ◽  
Bei Hua Cong ◽  
Xiao Ming Wu
Keyword(s):  
Heat Release ◽  
Cross Section ◽  
Large Scale ◽  
Simulation Analysis ◽  
Road Tunnel ◽  
Counter Flow ◽  
Smoke Flow ◽  
Tunnel Fire ◽  
Fire Scenarios ◽  
The Cross

The smoke characteristics of tunnel fire are preliminarily concerned with the heat release, the tunnel geometry, smoke outlet geometry, etc. However, the study on smoke characteristics of tunnel fire with different cross passage interval is relatively less at present. Base on the physical model of a large scale cross-section road tunnel, this paper carried out simulation and analysis on the smoke flow of several fire scenarios under different cross passage interval through FDS 5.4.3. The results demonstrated that in a certain extent while the cross passage interval was less than 400m, the longer the cross passage interval was, the longer the time when the smoke began to counter flow in the tunnel and the longer the length of counter-flow smoke. If the cross passage interval was beyond this scope, the time that the smoke began to counter flow and the length of counter-flow smoke tended respectively to be the same.

Air exchange dynamics in the system of large cross-section blind roadways

2020 ◽  
Vol 2 ◽  
pp. 46-57
Author(s):  
S.V. Maltsev ◽  
◽  
B.P. Kazakov ◽  
A.G. Isaevich ◽  
M.A. Semin ◽  
...  
Keyword(s):  
Cross Section ◽  
Large Cross Section ◽  
Air Exchange
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