Study Of Smoke Flow And Control In Interior Pedestrian Street

ABSTRACT:The fire of Large commercial complex will produce a lot of smoke, The spread of fire smoke may do harm to personnel within the building. Mechanical smoke exhaust system is an important means of fire smoke control, It is very necessary to research the mechanical smoke extraction mode and mechanical smoke exhaust effect in the interior pedestrian street. Reference to previous research results, using numerical simulation method researched for building fire smoke spread rule and smoke control mode and the effect. The main research contents and conclusions are as follows:Mechanical exhaust system affects smoke spread,the necessity of mechanical smoke exhaust in each position and mechanical smoke exhaust start mode were studied, the research has obtained the necessity of mechanical smoke exhaust in each position and the starting mode of the mechanical smoke extraction system in the interior pedestrian street.Fire power is an important factor that affecting the construction of mechanical smoke exhaust system, the Smoke control effect of corridor Smoke and atrium extraction system in different fire power was studied, the research has obtained the smoke exhaust volume that ensure the safe evacuation in building was related to fire power.smoke control effect is affected by the opening rate and the height of smoke screen, The mechanical smoke exhaust system is connected with the fire detector, through the study of the opening rate obtained the minimum opening rate that smoke spread to the atrium as much as possible. The spread of smoke in the loop length and height directions is influenced by smoke screen, the research has obtained the reasonable height of smoke screen.The smoke partition divided manner and length in the loop has studied,the studies have shown the smoke control effect of the adjacent smoke division and the atrium top in different loop division, put forward reasonable smoke zone form and length.Research has been clear about the interior pedestrian street of mechanical smoke extraction mode and key technical parameters, the results of the study provide the reference for the further study of the fire in the interior pedestrian street.