Impinging atomization enhanced by microjet injection - effect, mechanism and optimization

Chihiro Inoue, Toshinori Watanabe, Takehiro Himeno, Seiji Uzawa

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

2 被引用数 (Scopus)


Impinging atomization, which has been widely utilized in liquid rocket propulsion systems, is able to produce fine drops at a rated operation. In contrast, the atomization characteristics deteriorate under off design conditions when injection velocity comes to be slower. In the present study, for improving atomization characteristics at off design conditions, an effective technique is verified utilizing small amount of gas (microjet) injection. The microjet is supplied from a pressurized reservoir and is injected from the center of the liquid nozzles toward the impingement point. To clarify the flow field and the mechanism of the effect, experimental visualizations, drop size measurements and corresponding numerical analyses are carried out. It is elucidated that Sauter Mean Diameter (SMD) becomes one-tenth of the original SMD by the microjet injection with the amount of only 1% of liquid mass flow rate. The dominant non-dimensional number is found to be the ratio of the dynamic pressure (microjet/liquid jet) at the impingement point. The optimized atomization efficiency is achieved when the dynamic pressure ratio is approximately two.

ホスト出版物のタイトル49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
出版社American Institute of Aeronautics and Astronautics Inc.
出版ステータス出版済み - 1月 1 2013
イベント49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, JPC 2013 - San Jose, 米国
継続期間: 7月 14 20137月 17 2013


名前49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference
1 PartF


会議49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, JPC 2013
CitySan Jose

!!!All Science Journal Classification (ASJC) codes

  • 航空宇宙工学
  • 制御およびシステム工学
  • 電子工学および電気工学


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