An Experimental Study on Droplet Size Characteristics of Liquid Jets in Subsonic Crossflow

아음속 수직분사제트에서 액적크기 특성에 대한 실험적 연구

  • 김민기 (서울대학교 기계항공공학부) ;
  • 손진관 (서울대학교 기계항공공학부) ;
  • 김진기 (서울대학교 기계항공공학부) ;
  • 황용석 (국방과학연구소) ;
  • 윤영빈 (서울대학교 기계항공공학부)
  • Published : 2007.06.30


The spray characteristics and drop size measurements have been experimentally studied in liquid jets injected into subsonic crossflow. With water as fuel injection velocity, injection angle and atomize. internal flows were varied to provide of jet operation conditions. The injector internal flow was classified as three modes such as a non-cavitation flow, cavitation, and hydraulic flip flows. Pulsed Shadowgraph Photography measurement was used to determine the spatial distribution of the spray droplet diameter in a subsonic crossflow of air. And this study also obtains the SMD (Sauter Mean Diameters) distribution by using Planar Liquid Laser Induced Fluorescence technique. The objectives of this research are get a droplet distributions and drop size measurements of each condition and compare with the other flow effects. As the result, This research has been showned that droplet size were spatially dependent on air-stream velocity, fuel injection velocity, injection angle effects, and normalized distance from the injector exit length(x/d, y/d). There are also different droplet size characteristics between cavitation, hydraulic flip and the non-cavitation flows.