Smoke-Control Effects in the Horizontal Aisle of a High-rise Building
In the high-rise building fires, the most immediate threat to occupants is the smoke inhalation instead of exposing to the fire directly. After a fire occurred, the flow of smoke is a highly complicated, unsteady and rotary threedimension movement in the aisle of the high-rise building. Theoretical analysis and numerical simulations are applied in this article to analyze the effect of smoke-control methods for different setting models including the hall wall and smoke outlet, and obtain the optimization of ventilation mode. Especially, FLUENT is used to simulate the κ-ε three-dimension turbulence model with two equations to analyze the state of flue gas under the different smoke-control method or the variety positions and quantities of smoke outlets when it is on fire in the horizontally aisle. Comparing and analyzing the results of the numerical simulation, three conclusions can be drawn as follow: at first it is obviously effective for the hang wall to prevent smoke diffusion in the early fire. Secondly for some important places where mechanic smoke extraction is adopted, the smoke outlets should not be fixed near the atria. Especially when there is only one smoke outlet in the smoke bay, the outlet should be installed in the centre of the smoke bay. Finally the smoke outlet with a larger area could be divided into several small outlets reasonably when total exhaust smoke level is constant, and those small outlets need homogeneous distributions in the smoke bay, which may lower the control radius of every smoke outlet, control the smoke diffusion from temperature and concentration to make a good smoke control effect and prolong the time of personnel evacuation.
High-rise building aisle Smoke control Numerical simulation
Jingxian Li Jiapeng He Chengyin Jing Ru Zhou
College of Urban Construction and Safety Engineering,Nanjing University of Technology,Nanjing,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1332-1339
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）