燃油喷射瞬态雾化、蒸发及与空气混合过程的研究，是目前国内外柴油机燃烧与净化研究的前沿课题．利用激光技术与计算机图象处理技术，首次提出了对燃油喷雾蒸发过程中，气液两相的油滴密度与燃气浓度的三维分布，进行动态非接触同步定量测量的理论．通过自建的测试系统，给出了部分试验结果，为柴油机燃烧性能及排污的进一步改善提供了一定的理论依据 The transient atomization and evaporation of fuel injection and the research on the process of mixing with air are the forefront topics in the research of combustion and purification of diesel engine at home and abroad. Using laser technology and computer image processing technology, the theory of dynamic non-contact synchronous quantitative measurement for the three-dimensional distribution of gas-liquid two-phase oil droplet density and gas concentration during fuel spray evaporation was first proposed. Through the self-built test system, some test results are given, which provides a theoretical basis for the further improvement of the combustion performance of diesel engine and sewage