细水雾作用下火灾烟气典型特性参数的变化规律  

Variational Principles of Typical Smoke Characteristics with Water Mist Applying

作　　者：房玉东[1] 苏国锋[1] 林霖[2] 廖光煊[2] 

机构地区：[1]清华大学公共安全研究中心,北京100084 [2]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《燃烧科学与技术》2008年第4期372-377,共6页Journal of Combustion Science and Technology

基　　金：中国博士后科学基金资助项目(20070410067)

摘　　要：利用ISO 9705全尺寸多功能热释放速率测试仪研究细水雾作用下火灾烟气的消光系数、质量密度及辐射热通量等特性参数的变化规律,通过改变细水雾工作压力、喷头种类和喷头数量等参数研究雾滴粒径、喷雾强度等对烟气特性参数的影响规律.确定了受限空间通风助燃和熄灭火焰的临界速率.实验发现,火源热释放速率是影响烟气特性参数变化规律的主要内在因素.研究结果为细水雾技术用于火灾烟气抑制提供了科学的参考依据.ISO 9705 full-scale heat release rate platform for muhifunctional measurement is used to study light extinction coefficient, mass density and heat flux of smoke. The effects of droplet diameter, water mist flux and ventilation speed on smoke characteristic parameters are investigated by changing working pressure, nozzle type and nozzle number. The experimental results show that heat release rate of fire is the internal factor which determines smoke characteristic variation. This paper provides scientific references for water mist technology used in restraining fire smoke.

关 键 词：细水雾 烟气 消光系数 热释放速率 

分 类 号：TK121[动力工程及工程热物理—工程热物理]