燃烧场的流场诊断研究, 有利于燃烧室的结构设计和燃烧状态的组织。研究主要采用激光纹影/阴影和差分干涉方法显示燃烧场的波系结构,并用羟基平面激光诱导荧光（OH-PLIF）方法诊断燃烧边界和核心燃烧区域, 得到了清晰的燃烧场波系显示结果和燃烧情况的PLIF显示结果。将差分干涉/激光阴影和PLIF方法结合, 可以考察波系结构与燃料燃烧的关系。研究采用了一种新型消相干技术的激光纹影, 可以像常规纹影一样用刀口切割光源像, 不会产生明显的激光散斑和衍射现象; 同时在工程上将波系结构显示和PLIF进行同步诊断, 也是比较有意义的工作。该工作对于超声速燃烧流场的研究具有参考意义。

Diagnosis of combustion field was mainly useful to structure designing and combustion state organization of the combustion chamber. Laser schlieren/shadow and difference interferometer were used to study the wave structures of combustion field. And combustion border and combustion violent region were diagnosed by the planar laser-induced fluorescence of OH groups (OH-PLIF) method to get a clear field of combustion wave lines and the combustion results displaying by PLIF. Combining laser shadow/difference interferometer and OH-PLIF, the relationship between the wave lines and combustion could be seen. To cut the image of light source similarly to traditional schlieren by adopting a new laser schlieren technology, which produced not obvious laser speckle and diffraction phenomenon. What′s more, it was meaning to display the wave structure and diagnosis by PLIF at the same time. The work above can be a reference for the study of supersonic combustion fluid field.