摘要
为了研究汽油蒸气/空气的爆炸特性,介绍了汽油蒸气/空气预混火焰的无拉伸层流燃烧速率。通过实验研究了无拉伸层流燃烧速率,与汽油的主要组分异辛烷和正庚烷与空气的预混火焰层流燃烧速率做了对比,发现汽油蒸气/空气的无拉伸层流燃烧速率小于异辛烷和正庚烷与空气的预混火焰无拉伸层流燃烧速率,但无拉伸层流燃烧速率随当量比的变化规律相同,随着当量比增大,无拉伸层流燃烧速率呈先增大、再减小的变化趋势,最大值在当量比为1处取得。
In order to characterize the explosion of the gasoline vapor/air mixture, we introduced the unstretched laminar burning velocity of premixed gasoline vapor/air flame to the research of the mixture. The unstretched laminar burning velocity was experimentally studied and compared with those of two mixture gases consisting of such major compositions of gasoline as isooctane and n-heptane, respectively. The results show that the unstretched laminar burning velocity of the prepared gasoline vapor/air mixture is lower than those of the isooctane/air mixture gas and the n-heptane/air misture gas, but it takes on a similar tendency to change with the equivalence ratio, i.e. the unstretched laminar burning velocity firstly increases and then decreases with the increase of the equivalence ratio, and the maximum value can be obtained at the equivalence ratio of 1.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2017年第5期863-870,共8页
Explosion and Shock Waves
基金
国家自然科学基金项目(51704301)
国防科技基金项目(3604031)
重庆市研究生科研创新项目(CYS15235
CYB16128)
关键词
汽油蒸气
爆燃
预混火焰
超压
无拉伸层流
燃烧速率
gasoline vapor
deflgration
premixed flame
overpressure
unstretched laminar
burning velocity