水雾与浸没在多孔介质中乙醇火焰相互作用的实验研究  

Experimental studies on the interaction of water mist with flames of ethanol soaked in porous beds

作　　者：姚丽华[1] 孔文俊[1] 王宝瑞[1] 劳世奇[1] 

机构地区：[1]中国科学院工程热物理研究所

出　　处：《中国科学院研究生院学报》2008年第1期20-27,共8页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家自然科学基金(50406028);中国科学院知识创新工程(KJCX2-SW-L05)资助

摘　　要：研究了水雾与浸没在多孔介质中乙醇火焰间的相互作用.探讨了水雾喷射压力、燃料预燃时间以及多孔介质类型对水雾灭火规律的影响.实验结果表明燃料预燃时间相同时,水雾喷射压力越大,火焰区及燃料床内部的温度变化越快,火焰熄灭时间也越短;当水雾喷射压力相同时,预燃时间越长,火焰越容易被熄灭.此外多孔介质类型对水雾灭火效果有重要影响.Experimental studies were conducted to investigate the interaction of water mist with flames of ethanol fuels soaked in porous beds. Effects of the nozzle jet pressure, the fire preburn time and the characteristics of porous materials on the water mist extinguishing were conducted and discussed. The experimental results show that for the same preburn time, the larger the nozzle jet pressure is, the faster the temperature in both the flame zone and porous beds changes and thus the shorter the fire extinguishing time is. While under the same nozzle jet pressure condition, the longer the preburn time is, the shorter the fire extinguishing time is. Furthermore, effects of the characteristics of porous materials on fire extinguishment by water mist were also discussed.

关 键 词：细水雾 多孔介质 液体燃料燃烧 

分 类 号：TK16[动力工程及工程热物理—热能工程]