Theoretical and Experimental Study of Critical Velocity for Smoke Control in a Tunnel Cross-Passage

2010 ◽  
Vol 49 (2) ◽  
pp. 435-449 ◽  
Author(s):  
Ying Zhen Li ◽  
Bo Lei ◽  
Haukur Ingason
Keyword(s):  
Experimental Study ◽  
Critical Velocity ◽  
Smoke Control

Experimental study on fire smoke control using water mist curtain in channel

2018 ◽  
Vol 342 ◽  
pp. 231-241 ◽  
Author(s):  
Zhigang Wang ◽  
Xishi Wang ◽  
Yanqing Huang ◽  
Changfa Tao ◽  
Heping Zhang
Keyword(s):  
Experimental Study ◽  
Water Mist ◽  
Smoke Control ◽  
Fire Smoke

Experimental study on smoke control using wide shafts in a natural ventilated tunnel

2019 ◽  
Vol 195 ◽  
pp. 104015 ◽  
Author(s):  
Kun He ◽  
Xudong Cheng ◽  
Shaogang Zhang ◽  
Yongzheng Yao ◽  
Min Peng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Smoke Control

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 of Stick-Slip Sliding

1960 ◽  
Vol 82 (4) ◽  
pp. 393-398 ◽  
Author(s):  
B. R. Singh
Keyword(s):  
Experimental Study ◽  
Theoretical Analysis ◽  
Critical Velocity ◽  
Mechanical Model ◽  
Analog Computer ◽  
Experimental Results ◽  
Milling Machine ◽  
Friction Damping ◽  
Stick Slip ◽  
Electric Analog

The motion of a body sliding under boundary friction, at a velocity slower than a particular critical velocity of the system, proceeds in a discontinuous or stick-slip form. This paper presents a theoretical analysis and an experimental study of the critical velocity of stick-slip sliding. The influence of various parameters such as friction, damping, stiffness, and sliding mass of the system on the critical velocity was studied on a mechanical model arranged on a milling machine. The arrangement was also simulated on an electric analog computer. Good correlation was observed between the theoretical values and the experimental results on the mechanical model and on the analog computer.

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