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A platform for research: civil engineering, architecture and urbanism
Numerical Simulation of Smoke Flow Controlling in Railway Shield Tunnel
According to the position of burned train and the location of fire, the numerical simulation of smoke flow controlling was carried out in railway shield tunnel when a train caught fire to stop in the slope section being -3%. Tunnel fans fixed at the rear ingress are immediately to supply fresh air along tunnel, and the fans at the front exit to exhaust smoke. So there exists a great volume of wind along to take smoke outside the tunnel. Large eddy simulation was employed to simulate the smoke temperature, visibility and carbon monoxide concentration distribution in tunnel, at ventilation velocity of 1m/s, 2m/s, 3m/s and 4m/s, respectively. The results show that emergency ventilation policy, 3m/s, can effectively ensure passengers safe evacuation facing with fresh air, and the high temperature smoke under the ceiling do not damage tunnel lining structure. So the emergency ventilation policy is right and the evacuation plan is correct.
Numerical Simulation of Smoke Flow Controlling in Railway Shield Tunnel
According to the position of burned train and the location of fire, the numerical simulation of smoke flow controlling was carried out in railway shield tunnel when a train caught fire to stop in the slope section being -3%. Tunnel fans fixed at the rear ingress are immediately to supply fresh air along tunnel, and the fans at the front exit to exhaust smoke. So there exists a great volume of wind along to take smoke outside the tunnel. Large eddy simulation was employed to simulate the smoke temperature, visibility and carbon monoxide concentration distribution in tunnel, at ventilation velocity of 1m/s, 2m/s, 3m/s and 4m/s, respectively. The results show that emergency ventilation policy, 3m/s, can effectively ensure passengers safe evacuation facing with fresh air, and the high temperature smoke under the ceiling do not damage tunnel lining structure. So the emergency ventilation policy is right and the evacuation plan is correct.
Numerical Simulation of Smoke Flow Controlling in Railway Shield Tunnel
Jiang, Xue-Peng (author) / Ji, Hua-yun (author) / Xu, Zhi-Sheng (author) / Yang, Xiao-Li (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Settlement , Simulation , Railroad tracks , Tunnels , Monitoring , Fires , Inventories
Numerical Simulation of Smoke Flow Controlling in Railway Shield Tunnel
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