Large Eddy Simulation of Fire Smoke Diffusion in Subway Tunnel
A mathematical model has been built and Large Eddy Simulation (LES) is adopted to predict smoke movement in the tunnel between the Ji-Shuitan and Gu-Lou subway stations. This tunnel is a representative subway tunnel between two stations in the loop line of Beijing Subway Systems. The smoke species mass concentration distributions at different heights, smoke horizontal movement distance, spreading velocity under different operating schemes of tunnel exhaust fan are predicted. The smoke exhausted effects of tunnel ventilation fan arc testified. The results show that the existed smoke exhaust system could reach the critical tunnel ventilation velocity under 5MW fire condition and smoke layer could be kept at a safety height for passengers evacuation. The simulated results can be taken as reference for the tunnel reconstruction and establishing passenger evacuation scheme.
tunnel smoke large eddy simulation subway flow simulation
CAI Na LI Yanfeng ZHU Bin LI Junmei DU Xiuli
College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100024,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
684-689
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）