Effect of blockage ratio on backlayering length of thermal smoke flow in a longitudinally ventilated tunnel

• Published in: Applied thermal engineering Vol. 132; pp. 1 - 7
• Main Authors: Meng, Na, Liu, Xiaomei, Li, Xiao, Liu, Beibei
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 05.03.2018; Elsevier BV
• Subjects: Backlayering length, blockage ratio; Collapse; Longitudinal ventilation; Mathematical models; Smoke; Tunnel fire; Tunnels; Upstream; Ventilation; Backlayering length, blockage ratio; Tunnel fire; Longitudinal ventilation

•Experimental study on backlayering length of thermal smoke flow in a model tunnel.•Blockages with different blockage ratios upstream of fire source were considered.•The effect of blockage ratio on backlayering length was studied.•A new expression was proposed to predict the backlayering length. Exp...