火焰羽流区细水雾利用效率及控制研究  

Study on utilization efficiency and control of water mist in flame plume areas

作　　者：何明礼 章光[1] 胡少华[1] 刘衍 HE Mingli;ZHANG Guang;HU Shaohua;LIU Yan(School of Safety Science and Emergency Management,Wuhan University of Technology,Wuhan Hubei 430070,China;Shiyan City Tobacco Company,Hubei Tobacco Company,Shiyan Hubei 442000,China)

机构地区：[1]武汉理工大学安全科学与应急管理学院,湖北武汉430070 [2]湖北省烟草公司十堰市公司,湖北十堰442000

出　　处：《中国安全科学学报》2019年第11期39-44,共6页China Safety Science Journal

摘　　要：为提高细水雾的灭火效能,研究细水雾对火焰的冷却性能。建立火焰区细水雾的运动、传热与传质模型,采用此模型全面评估影响细水雾穿透距离和汽化性能的因素,提出一种合理确定液滴初始粒径和初始速度的方法,以及能够提高细水雾利用效率的射流协流细水雾系统。结果表明:各因素影响作用由大至小排序为液滴初始粒径、传热温差、液滴初始速度、火焰羽流速度;该系统能够显著提高细水雾的穿透距离,增大细水雾的汽化率。In order to improve fire extinguishing efficiency of water mist,its cooling effect on flame is studied.Firstly,a motion,heat and mass transfer model of water mist in flame areas were established which was utilized to evaluate factors that affected its penetration distance and vaporization performance comprehensively.Then,a method to reasonably identify initial size and velocity of droplets and a co-flow jet water mist system which could improve utilization efficiency were proposed.The results show that those factors rank according to their influence degree from high to low is initial size of droplets,heat transfer temperature difference,initial velocity of droplets,flame plume velocity.Penetration distance and vaporization rate of water mist can be significantly improved by this system.

关 键 词：火焰羽流 细水雾 穿透距离 汽化性能 射流协流细水雾系统 

分 类 号：X932[环境科学与工程—安全科学]