Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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The Flow Characteristics with Variation of Nozzle-to-nozzle Angles on Unventilated Dual Jests

이중제트에서 노즐과 노즐사이의 각도 변화에 따른 유동 특성

  • 김동건 (부산대학교 기계기술연구원) ;
  • 김문경 (창원전문대학 기계설계과) ;
  • 윤순현 (부산대학교 기계공학부)
  • Published : 2008.11.30
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Abstract

The characteristics of flow on unventilated dual jets was experimentally investigated. The two nozzles each with an aspect ratio of 20 were separated by 6 nozzle widths. Reynolds number based on nozzle width was set to 5,000 by nozzle exit velocity. All measurements were made over a range of nozzle-to-nozzle angles from $0^{\circ}$ to $25^{\circ}$. The particle image velocimetry and pressure transducer were employed to measure turbulent velocity components and mean static pressure, respectively. It was shown that a recirculation zone with sub-atmospheric static pressure was bounded by the inner shear layers of the individual jets and the nozzles plated. As nozzle-to-nozzle inclined angles were decreased, it was found that the spanwise turbulent intensity is greater than the streamwise turbulent intensity in the merging region. In the combined region, the velocity of dual jets agree well with that of single jet, but the turbulence intensity of dual jets not agree with that of single jet.

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References

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Cited by

  1. Computational Study on The Effect of Injection Nozzle Hole Exit Angle Variation on Injection Characteristics vol.36, pp.8, 2012, https://doi.org/10.5916/jkosme.2012.36.8.997