预测火灾情况下竖井中性面位置的连续模型  

Model for Neutral-Plane Location in Shaft in Fire

作　　者：许晓元[1] 李元洲[1] 毛少华[1] 阳东[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027

出　　处：《燃烧科学与技术》2011年第4期375-381,共7页Journal of Combustion Science and Technology

基　　金：安徽省自然科学基金资助项目(11040606M117)

摘　　要：针对竖井侧向连续开缝和竖井侧向连续开缝及上部开口两种情况,在Klote模型的基础上,根据竖井内温度在竖向上连续分布的特点,建立了预测火灾情况下竖井中性面高度的连续模型.通过计算流体力学模拟,将Klote模型、双区域模型及连续模型与模拟结果进行对比.结果表明,连续模型偏差最小;通过分析连续模型计算结果可知,中性面高度受火源功率的影响较小,主要和开口情况有关.A model was proposed for determining the location of neutral-plane in a shaft with a continuous side opening or with both a continuous side opening and a upper opening. Based on the Klote model, the new model was sim- plified according to the temperature distribution inside the shaft in fire. A numerical study was also carried out by using a computational fluid dynamics （CFD）. The results prove that the new model is in good agreement with the simulation results.

关 键 词：竖井 中性面 烟气运动 烟囱效应 计算流体力学 

分 类 号：X932[环境科学与工程—安全科学]