高层建筑火灾时烟气在横向疏散通道内的扩散  

Smoke Diffusion in Transverse Passageway of High-Rise Building Fires

作　　者：周汝[1] 何嘉鹏[1] 蒋军成[1] 缪伟[2] 姜正良[2] 

机构地区：[1]南京工业大学城建与安全环境学院,南京210009 [2]南京航空航天大学航空宇航学院,南京210016

出　　处：《南京航空航天大学学报》2007年第3期412-416,共5页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：江苏省社会发展基金(BS2003031)资助项目

摘　　要：通过建立高层建筑内烟气流动的数学模型,采用κ-ε双方程3维紊流模型对高层建筑火灾时烟气在横向疏散通道内的扩散进行了数值模拟,对火灾分别发生在第3,4和8层的烟气扩散的温度场、环境场、速度场和浓度场进行了分析,结果显示温度、速度与浓度在横向疏散通道内的变化跟高层建筑楼层有关系,发生火灾的楼层离中性层越远,变化越大,越快。A mathematical model for smoke flow in high-rise building fires is established and a three-dimensional turbulence model of κ-ε types is used in the simulation of smoke flow diffusion in transverse passageway of high-rise building fires. The temperature, velocity, environment and concentration fields of smoke in the 3rd, 4th and 8th floors are analyzed. Results show that the variations of temperature, velocity and concentration in the transverse passageway are related with the floors. The variations are more great and quick when the fire floor is further away from the neutral surface.

关 键 词：高层建筑 火灾 烟气 疏散通道 数值模拟 

分 类 号：TU976[建筑科学]