Two typical phenomena from the numerical simulation of fire and smoke transport in a gymnasium fire  

作　　者：CHEN Jianguo CHEN Haixin FU Song 

机构地区：[1]Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Science Bulletin》2006年第12期1521-1525,共5页

摘　　要：Navier-Stokes equations are solved to simulate a gymnasium fire. The equations are simpli- fied by weakly compressible low Mach number as- sumption. Turbulence effect is simulated using Smagorinsky large eddy simulation (LES) model. The mixture fraction combustion model is adopted to simulate the burning process. With the analysis of computed velocity and temperature field, two impor- tant phenomena, named door effect and smoke plug-holing, are found to be responsible for the dete- rioration of smoke exhaust efficiency when natural ventilation or forced ventilation is present. Some ex- planations are made to elucidate these effects’ mechanism. An improved design of smoke ventilation system is suggested.Navier-Stokes equations are solved to simulate a gymnasium fire. The equations are simplified by weakly compressible low Mach number assumption. Turbulence effect is simulated using Smagorinsky large eddy simulation （LES） model. The mixture fraction combustion model is adopted to simulate the burning process. With the analysis of computed velocity and temperature field, two important phenomena, named door effect and smoke plug-holing, are found to be responsible for the deterioration of smoke exhaust efficiency when natural ventilation or forced ventilation is present. Some explanations are made to elucidate these effects＇ mechanism. An improved design of smoke ventilation system is suggested.

关 键 词：计算流体力学 体育馆 火灾 通风 消防 

分 类 号：TU998.1[建筑科学—市政工程]