环境风对室内燃烧热释放速率的影响  

Effect of ambient wind on heat release rate inside the compartment fire

作　　者：杨莉仙 李晓琦 冯伟 孙协鹏 Yang Lixian;Li Xiaoqi;Feng Wei;Sun Xiepeng(Datong Fire and Rescue Division,Shanxi Datong 037000,China;Tianjin Fire Science and Technology Research Institute of MEM,Tianjin 300382,China;Key Laboratory of Fire Protection Technology for Industry and Public Building,Ministry of Emergency Management,Tianjin 300382,China;Tianjin Key Laboratory of Fire Safety Technology,Tianjin 300382,China;State key Laboratory of Fire Science,University of Science and Technology of China,Anhui Hefei 230026,China)

机构地区：[1]大同市消防救援支队,山西大同037000 [2]应急管理部天津消防研究所,天津300382 [3]工业与公共建筑火灾防控技术应急管理部重点实验室,天津300382 [4]天津市消防安全技术重点实验室,天津300382 [5]中国科学技术大学火灾科学国家重点实验室,安徽合肥230026

出　　处：《消防科学与技术》2023年第7期935-939,共5页Fire Science and Technology

基　　金：国家自然科学基金青年科学基金项目(52206181)。

摘　　要：燃烧房间内部热释放速率是描述火灾危险程度的重要参数。对传统室内燃烧热释放速率的获得方法进行了总结,即锥形量热仪测量室内燃烧热释放速率的试验方法,和通过热浮力作用下计算开口补气质量流量,并通过氧耗法计算室内热释放速率的理论方法,阐述了其各自特点,提出使用数值模拟来研究环境风对燃烧房间热释放速率的影响,通过典型算例验证了试验和理论计算的准确性。模拟了环境风作用下室内燃烧热释放速率的演变情况,发现室内燃烧热释放速率随着风速的增加而降低,并且在通风控制燃烧阶段室内燃烧热释放速率随总热释放速率变化不大,未来研究工作可以通过数值模拟方法进行热释放速率的预测。The heat release rate in the compartment fire is an important parameter to describe the fire risk.This paper summarizes the traditional methods of the obtaining the heat release rate inside the compartment fire(experimental method and theoretical calculation),i.e.,the experimental method of measuring the heat release rate inside the compartment fire using the cone calorimeter,and the calculation of the mass flow rate through the opening based on the buoyancy effect,hence,the theoretical method of calculating heat release rate by the oxygen consumption method is introduced,and its characteristics are expounded.Numerical simulation is proposed to study the heat release rate inside the compartment fire,and the accuracy of experimental and theoretical calculation is verified by typical fire case.Finally,the evolution of the heat release rate inside the fire room under the effect of ambient wind is simulated.It is found that the heat release rate inside the fire room decreases with the increase of wind speed,and the heat release rate does not change the total heat release rate in the under-ventilated condition.In future research,the heat release rate can be expected by numerical simulation method.

关 键 词：燃烧房间 热释放速率 数值模拟 

分 类 号：X913.4[环境科学与工程—安全科学] O551[理学—热学与物质分子运动论]