【摘要】 本文应用复合激光诱导荧光(Planar Laser Induced Exciplex Fluorescence)测试技术,实现了对BUMP燃烧室内柴油喷雾的气液相浓度分布同时进行测量的光学测试系统,并研究了改变BUMP燃烧室形状和二次撞壁距离对喷雾气液相浓度场分布的影响情况。研究发现,BUMP燃烧室形状对喷雾缸内分布有明显作用,合适的BUMP高度能够剥离撞壁喷雾,形成二次射流,加速喷雾在燃烧室内与空气的混合,研究中缩口角度14°,BUMP高度1.5mm的BUMP燃烧室具有研究中最理想的喷雾气液相缸内分布。更多还原

【Abstract】 Planar Laser Induced Exciplex Fluorescence technique was used to realize the measurement of vapor-and liquid-phase of diesel spray simultaneously in this study.The influence of the combustion chamber shape on vapor-and liquid-phase spray distribution was investigated.The results showed that in ω shape combustion chamber the angle of the combustion chamber had an obvious effect on the diesel distribution.The bigger the angle is,the more homogeneous and wider the distribution of the vapor-phase spray is,and the more obvious splash of liquid-phase spray there occurs.更多还原