Abstract: A laser holograph and image processing method was used to analysis the striking and spray properties of unlike double impinging injector.The spray characteristics were obtained.The spray properties and combustion efficiencies of combustion chamber were statistically analyzed,the relationship between the water test spray property and the hot run performance was found.The following results were reached during the research:the water test spray property can be used to evaluate the hot run performance and examine injector performance.The method has been used for selection and quality inspection of injectors of small thrust liquid propellant rocket engine.

Key words: Impinging injector;Propellant spray;Holography

摘要： 用激光全息及图像处理技术，研究两股互击式喷嘴的撞击状况及雾化性能，获得了喷嘴的雾化性能参数，在喷嘴的水试雾化性能、热试燃烧效率及比冲对比后，提出用水试雾化性能评估其热试效果，检验喷嘴的加工质量。此技术已用于小推力发动机喷嘴的筛选。

关键词: 撞击式喷嘴;推进剂雾化;全息摄影