摘要
以报纸、纸板和碎纸屑等常见固体可燃物为对象,考察汽油添加量对其引燃时间、火焰传播速率、火灾痕迹及烧损速率的影响,分析固体材料性质对浸油固体着火及燃烧特性的影响机理。结果表明:随着汽油含量增加,报纸和纸壳的引燃时间缩短,表面火焰传播速率加快,超过一定值后有闪火出现,烧损速率增加,而碎纸屑的火焰传播速率则随汽油含量的增加呈先增大后减小的趋势。浸油纸壳燃烧时能够明显地区分出汽油燃烧和纸壳炭化两个速率。
Taken common solid combustibles,such as newspapers,cardboard and broken scraps of paper,this paper examined the impact on ignition time,flame propagation rate,fire sighs and burning loss rate from the amount of fuel and analyzed the mechanism of solid material properties＇ impact on solid leached gasoline fire andcombustion characteristics.With the increase of gasoline content,the ignition time of newspapers and cardboard is shortened and the surface flame propagation rate speeds up.After more than a certain value,flashover is discovered and burning loss rate increases.The flame propagation rate of broken scraps of paper is first increases,and then decreases with the increase of the content of the gasoline.The rates of gasoline combustion and cardboard carbonization can be distinguished clearly during combustion of cardboard leached gasoline.
出处
《消防科学与技术》
CAS
北大核心
2011年第9期770-773,共4页
Fire Science and Technology
关键词
火焰传播速率
引燃时间
汽油
燃烧特性
flame propagation rate
ignition time
gasoline
combustion characteristics
