Effect of blockage ratio on critical velocity in tunnel fires

2012 ◽  
Vol 30 (5) ◽  
pp. 413-427 ◽  
Author(s):  
Liming Li ◽  
Xudong Cheng ◽  
Yu Cui ◽  
Sen Li ◽  
Heping Zhang
Keyword(s):  
Critical Velocity ◽  
Blockage Ratio ◽  
Tunnel Fires

Smoke Control in Subway Tunnel Fires

2014 ◽  
Vol 638-640 ◽  
pp. 2027-2030
Author(s):  
Xiao Xiong Zha ◽  
Sheng Zeng ◽  
Yi Yan Chen ◽  
Rui Juan Jiang
Keyword(s):  
Computer Simulation ◽  
Theoretical Analysis ◽  
Critical Velocity ◽  
Simple Formula ◽  
Control Mode ◽  
Subway Tunnel ◽  
Smoke Control ◽  
Release Rates ◽  
Tunnel Fires ◽  
Ventilation Velocity

This paper concerns the smoke control modes and the critical ventilation velocity when the subway tunnel on fires. The standard for the smoke control mode is making sure the smoke exhausting in the shortest way. The critical ventilation velocity means it is just sufficient to prevent the smoke spreading upstream. The critical velocity in different heat release rates obtained though theoretical analysis and computer simulation. In the end, a simple formula to calculate the critical velocity can be fitting out.

Study of critical velocity and backlayering length in longitudinally ventilated tunnel fires

2010 ◽  
Vol 45 (6-8) ◽  
pp. 361-370 ◽  
Author(s):  
Ying Zhen Li ◽  
Bo Lei ◽  
Haukur Ingason
Keyword(s):  
Critical Velocity ◽  
Tunnel Fires

Effect of blockage ratio on the maximum temperature under the ceiling in tunnel fires

2012 ◽  
Vol 31 (3) ◽  
pp. 245-257 ◽  
Author(s):  
Liming Li ◽  
Xudong Cheng ◽  
Yu Cui ◽  
Wenhui Dong ◽  
Zhibin Mei
Keyword(s):  
Maximum Temperature ◽  
Blockage Ratio ◽  
Tunnel Fires
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