• Title/Summary/Keyword: 액주분열길이

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Effects of Orifice Internal Flow on Transverse Injection into Subsonic Crossflows (아음속 유동장에 수직분사시 오리피스 내부유동 효과에 대한 연구)

  • 김정훈;안규복;윤영빈
    • Journal of the Korean Society of Propulsion Engineers
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    • v.7 no.1
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    • pp.28-39
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    • 2003
  • Effects of the orifice internal flow such as cavitation and hydraulic flip on transverse injection into subsonic crossflows have been studied. The liquid column breakup length and the liquid column trajectory were measured by changing the orifice diameter (d), the orifice length/orifice diameter (L/d), the injection pressure and the shapes (sharp and round) of orifice entrance, and were compared with previous results. It is found that cavitation bubbles, which occur inside the sharp-edged orifice, make the liquid jet very turbulent and especially in the orifices with L/d = 5 hydraulic flip appear as cavitation bubbles are emitted from the orifice. The breakup length is shorter as cavitation bubbles grows and hydraulic flip appears. However, the liquid column trajectories normalized by the effective diameter and the effective momentum ratio have a similar tendency irrespective of cavitation and hydraulic flip.