摘要
以气体流动控制方程为基础,基于湍流大涡算法研究国防工程不同出口类型防火分区不同位置着火点发生火灾时烟气扩散规律,分析走廊烟气特征参数分布和人员逃生时的火灾危险性。研究表明:对于双向型出口,走廊烟气和空气分布有明显热分层现象,走廊能见度最好、温度最低;单向型出口温度沿走廊呈衰减趋势,在着火房间处走廊温度较高;CO 2浓度在各种出口类型下均能满足人员逃生要求;全封闭型分区能见度低,火场温度高,火灾危险性最大。
The smoke diffusion at different locations of fire exits in different export types in protective engineering fire is simulated based on the turbulence large eddy algorithm,which is based on air flow control equation in general,and the distribution of smoke characteristic parameters and the fire hazard during personnel escape is analyzed.The results shows that in the two-way export,there is significant thermal stratification in the flue gas and air distribution in the corridor with the best visibility and lowest temperature;For the one-way export,the temperature decays along the corridor,and the temperature is higher in the corridor near the fire room;CO 2 concentration can meet personnel escape requirements under various export types;In the fully enclosed fire compartment,visibility is low,fire temperature is high,and fire risk is greatest.
作者
张志
邓忠凯
杨水亲
骆秋良
吴炜佳
李超伟
Zhang Zhi;Deng Zhongkai;Yang Shuiqin;Luo Qiuliang;Wu Weijia;Li Chaowei(The 75714 Troops of the Chinese People′s Liberation Army,Hengyang 421900,China)
出处
《信息技术与网络安全》
2020年第1期55-58,73,共5页
Information Technology and Network Security
关键词
湍流大涡算法
火灾
国防工程
烟气扩散
人员逃生
turbulent large eddy algorithm
fire
protective engineering
smoke diffusion
personnel evacuation
