细水雾抑制淬火油池火的小尺度实验  

Bench-Scale Experiment on Quenching Oil Pool Fire Suppression with Water Mist

作　　者：李权威[1] 秦俊[1] 唐海东[1] 倪佳迪[1] 张向阳[1,2] 雷波[1,3] 廖光煊[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027 [2]重庆市大渡口区公安消防支队,重庆400084 [3]重庆市南岸区公安消防支队,重庆400060

出　　处：《燃烧科学与技术》2010年第3期274-280,共7页Journal of Combustion Science and Technology

摘　　要：通过小尺度模拟实验对两种不同喷头所产生的细水雾抑制熄灭淬火油池火的研究发现,细水雾施加之初对淬火油池火有明显的强化作用,粒径和速度较大的细水雾强化燃烧的程度较大但持续的时间较短,且粒径和速度较大的细水雾抑制熄灭淬火油池火的效率较高.实验观测和分析表明,粒径和速度较小的细水雾主要通过卷吸空气强化燃烧,其灭火机理主要是火焰冷却和燃料表面冷却,粒径和速度较大的细水雾则主要通过共沸强化燃烧,其灭火机理主要是燃料表面冷却.The validity of water mist extinguishing quenching oil pool fire was studied using two kinds of nozzles by bench-scale experiments.It was found that in both processes of water mist fire suppression the phenomenon of fire expansion may be found initially.The one with larger droplet size and faster velocity leaded to a much more intensive-ly but evidently shorter combustion intensifying,and showed a higher extinguishing efficiency.Experiments and theoretic study showed that the one with smaller and slower mists intensified combustion mainly by air entraining and extinguished fire mainly by flame and oil surface cooling,while the one with larger and faster mists intensified com-bustion mainly by azeotropism with oil and extinguished fire mainly by oil surface cooling.

关 键 词：细水雾 淬火油 油池火 强化燃烧 灭火机理 

分 类 号：X932[环境科学与工程—安全科学]