Influences of Smoke Exhaust Effect by Setting Antechamber Buffer Zone in Straight Corridor of High-rise Building

摘要

In high-rise building fires, a great deal of fresh air will be sent into the fire floor when pressurization is taken. Smoke is diluted by the fresh air, and the efficiency of mechanical smoke exhaust is reduced. The assumption that set antechamber buffer zone in straight corridor of highrise building was put forward, and mathematic model of smoke flow in high-rise building and κ=ε threedimension turbulence model with two equations were used to simulate the influences of smoke exhaust effect by setting antechamber buffer zone in straight corridor of high-rise building. The results shown that, for straight corridor, setting antechamber buffer zone the efficiency of mechanical smoke exhaust was about 3.6% higher than without antechamber buffer zone and smokeless zone was formed in the corridor nearby antechamber, and it was helpful to escaping from fire floor for people.