高层建筑走廊排烟口与挡烟垂壁组合控制烟气的研究  

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

作　　者：李静娴[1,2] 何嘉鹏[1,2] 许小磊[1,2] 

机构地区：[1]南京工业大学城市建设与安全工程学院,南京210069 [2]江苏省城市与工业安全重点实验室,南京210009

出　　处：《建筑科学》2011年第2期97-101,共5页Building Science

基　　金：江苏省自然科学基金项目(BK2008369)

摘　　要：高层建筑发生火灾时,走廊是烟气扩散的重要途径,同时也是人员逃生的必经之路。本文通过建立高层建筑内烟气流动的数学模型,采用k-ε两方程三维紊流模型,利用FLUENT软件对高层建筑火灾时不同排烟方式下的机械排烟进行了模拟,对比分析了高层建筑条形走廊内不同排烟口与挡烟垂壁之间的距离,以及不同挡烟垂壁高度情况下走廊内烟气的扩散状况。结果表明,在高层建筑条形走廊内设置挡烟垂壁能够较好地降低挡烟垂壁下游走廊内的危险性;挡烟垂壁与排烟口之间的距离对排烟的影响不大,挡烟垂壁的下垂高度是影响排烟效果的关键因素;垂壁下垂高度每增加0.2 m,其下游平均温度将减小10℃左右。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-ε 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 ℃.

关 键 词：高层建筑 火灾 条形走廊 挡烟垂壁 组合控制 

分 类 号：TU998.1[建筑科学—市政工程]