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为了深入了解甲基环己烷的燃烧特性,利用定容燃烧弹和光学纹影测量系统分别对不同初始条件下的甲基环己烷/空气层流火焰燃烧特性进行研究。用自编的Matlab图片处理程序对定容弹内球形火焰传播过程的纹影图片进行分析,得到不同初始条件下甲基环己烷/空气的拉伸火焰传播速度、马克斯坦长度和层流燃烧速度等层流燃烧参数,并给出了以初始压力和初始温度为变量的甲基环己烷/空气的层流燃烧速度拟合公式。研究结果表明:甲基环己烷/空气的拉伸火焰传播速度与初始压力呈负相关,在当量比?>0.8时,与拉伸率呈负相关;马克斯坦长度与燃料空气当量比、初始压力和初始温度都呈负相关;层流燃烧速度与初始温度呈正相关,与初始压力呈负相关,并通过与其他的研究数据进行对比,表明构建的层流火焰燃烧速度拟合公式较为合理。
In order to further understand the combustion characteristics of methylcyclohexane, the combustion characteristics of methylcyclohexane / air laminar flow flame under different initial conditions were studied respectively by using constant volume combustion bomb and optical shadow measurement system. The self-made Matlab image processing program was used to analyze the shadow images of the ball-shaped flame propagation in the constant volume bomb. The tensile flame propagation velocity of methylcyclohexane / air under different initial conditions, the length of the marxist and the laminar flow combustion Velocity and other laminar combustion parameters, and gave the fitting formula of laminar burning velocity of methylcyclohexane / air with initial pressure and initial temperature as variables. The results show that the propagation velocity of TMAH is negatively correlated with the initial pressure, and negatively correlated with the elongation at equivalence ratio> 0.8. The ratio of the length of Marker to the fuel air equivalence, the initial The pressure and the initial temperature are negatively correlated. The laminar flow combustion rate is positively correlated with the initial temperature and negatively correlated with the initial pressure. The comparison with other data shows that the laminar flame combustion speed fitting formula is reasonable.