火灾情况下地下商业街排烟系统影响的数值研究(英文)  

A numerical study on effect of smoke extraction system in an underground shopping mall under fire situation

作　　者：卢伟真[1] K.C.Pang 胡忠日[2] 梅秀娟[2] 

机构地区：[1]香港城市大学建筑系 [2]公安部四川消防研究所,四川都江堰611830

出　　处：《消防科学与技术》2004年第1期49-53,65,共6页Fire Science and Technology

摘　　要：用不同排烟系统对火灾情况下地下商业街进行了数值研究。研究考察了由不同出入口组合组成的三个火灾场景。本文用 CFD对地下商业街的烟气情况进行了场模拟。所用技术是雷诺 Navier- Stokes公式 ,具体标准 K- E模型。不同排烟系统用预测烟气流动模式及温度场来加以区分。研究发现 ,供气口位置对烟气流动模式却是影响很大。更重要的发现是楼梯井起到了不同的作用和影响。不正确的设计可导致更糟的结果。为了设计合适的排烟系统 ,必须对其性能进行研究。Presents a numerical study of underground shopping mall under a fire with different smoke extraction systems.Three scenarios consist of different combinations of inlets and outlets were examined.A field modeling of smoke phenomena in underground shopping mall is presented by the CFD.The predicated smoke flow pattern and the temperature field are used to distinguish the effects of different smoke extraction systems.It is found that the influence of supply inlets positions do affect the smoke flow pattern strongly.On top of that,it is found that the stairacses play different roles and different functions.Improper design can lead to worse results.Investigation of their performance is therefore required in order to design a proper system.(

关 键 词：地下商业街 排烟系统 火灾 K—E模型 烟气流动 楼梯井 

分 类 号：TU967[建筑科学]