两股互击式喷嘴雾化性能实验研究

Experimental research on spray properties of unlike impinging injectors

关键词:  撞击式喷嘴  推进剂雾化  全息摄影

Key words:  Impinging injector  Propellant Spray  Holography

摘要:

用激光全息及图像处理技术,研究了双股互击式喷嘴的雾化性能。实验发现,喷嘴的撞击夹角增大、孔径比减小、两射流的动量比减小均会使喷雾的破碎长度和液滴直径减小。在初始雾化区域,液膜和液丝的速度与射流的速度基本相同,液滴的运动速度略小于射流速度。通过实验数据的分析整理,获得了喷雾的索特尔平均直径的经验公式。

Abstract:

The laser holograph and image processing method was used to analysis the spray property of the unlike double impinging injector The experimental results indicate:The increase of injection angle and the decrease of ratio of two injection orifice diameter or two injection flow momentum could result in the decrease of drop diameter and spray split length The liquid film and liquid silk velocity is the same as injection velocity The drop velocity is slightly lower than injection velocity in the initial spray area The experience formula of Sauter diameter were obtained by analyzing of experimental data