摘要
高层建筑发生火灾时,采用加压防烟将会有大量的新鲜空气被送入着火层。这些新鲜空气稀释了烟气,从而降低了机械排烟效率。提出了高层建筑条形走廊前室缓冲区的设想,并通过高层建筑内烟气流动的数学模型,采用双方程三维紊流模型,对相同排烟量情况下前室缓冲区对排烟效果的影响进行了模拟计算和对比分析。结果表明:对条形走廊,前室缓冲区能够提高机械排烟效率近3.6%,同时在前室门附近走廊内形成一段相对安全的区域,有利于人员逃离着火层。
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 of setting atria buffer zone in straight corridor of high-rise building was put forward,and mathematic model of smoke flow in high-rise building and three-dimension turbulence model with two equations were used to simulate the influences of smoke exhaust effect by setting atria buffer zone,in straight corridor of high-rise building.The results showed that,for straight corridor,by setting atria buffer zone the efficiency of mechanical smoke exhaust was about 3.6% higher than which atria buffer zone is not set,and smokeless zone would formed in the corridor nearby atria,and it is helpful to escape from fire floor for people.
出处
《中国安全生产科学技术》
CAS
北大核心
2011年第1期38-42,共5页
Journal of Safety Science and Technology
基金
江苏省自然科学基金项目(编号:BK2008369)
关键词
条形走廊
排烟
缓冲区
模拟
straight corridor
smoke exhaust
buffer zone
simulation
