Experimental studies on interaction of water mist with class K fires  

作　　者：FANG Yudong ZHANG Yongfeng LIN Lin LIAO Guangxuan HUANG Xin CONG Beihua 

机构地区：[1]University of Science & Technology of China, State Key Laboratory of Fire Science, Hefei 230026, China

出　　处：《Chinese Science Bulletin》2006年第24期3053-3058,共6页

基　　金：Acknowledgements The authors would like to thank Prof. Qin Jun for his useful suggestion, discussion and help. This work was supported by the China National Key Basic Research Special Funds （Grant No. 2001CB409600）, the National Natural Science Foundation of China （Grant No. 50323005） and the Anhui Development Fund of Person with Ability （Grant No. 2003Z019）.

摘　　要：Interaction of water mist with cooking oil fires is studied experimentally and theoretically. A LDV/APV system is used to measure the velocity and diameter of water mist at different pressures in the experiments,and the effect of water mist velocity and diameter on fire extinguishment efficiency is investi-gated. The experimental results show that water mist has excellent surface cooling effect; it can control and extinguish cooking oil fires quickly without re-ignition. The critical temperature (Tfo) is calculated by energy balance equation,and the fire plume momentum is calculated and compared with that of water mist in order to determine the critical velocity (νwy) of fire extinguishment. This paper provides references for cooking oil fires extinguishment with water mist.Interaction of water mist with cooking oil fires is studied experimentally and theoretically. A LDV/APV system is used to measure the velocity and diameter of water mist at different pressures in the experiments, and the effect of water mist velocity and diameter on fire extinguishment efficiency is investigated. The experimental results show that water mist has excellent surface cooling effect; it can control and extinguish cooking oil fires quickly without re-ignition. The critical temperature （Tfo） is calculated by energy balance equation, and the fire plume momentum is calculated and compared with that of water mist in order to determine the critical velocity （Vwy） of fire extinguishment. This paper provides references for cooking oil fires extinguishment with water mist.

关 键 词：水雾 K级火灾 食用油 油类燃烧 重新起火 灭火效果 

分 类 号：TU998.12[建筑科学—市政工程] O643.21[理学—物理化学]