Research on Smoke Control by Combination of Corridor Smoke Outlet and Smoke Retaining Screen in High-rise Buildings

The corridor of high-rise building is the important approach to dissipate smoke in the fire,and also the only way for personnel evacuation.In this paper,through establishing the mathematical model of smoke movement in the high-rise building,the k-e equation 3-D turbulent model were adopted,and FLUENT software was utilized to simulate the mechanical smoke discharge in different smoke discharge modes in the fire of high-rise buildings,the distance between different smoke outlets in the straight corridor and smoke retaining screen was compared and analyzed,as well as the smoke dissipation conditions in the corridor with the smoke retaining screen in different heights.The results illustrated that the smoke retaining screen set in the straight corridor could well reduce the hazard of the downstream corridor of the smoke retaining screen.Furthermore,the distance between the smoke retaining screen and smoke outlet had small influence on the smoke discharge,and the drooping height of the smoke retaining screen was the key factor to affect the smoke discharge effect.In addition,whenever the drooping height of the ceiling screen was increased by 0.2 m,the average downstream temperature would be reduced by 10 ℃.