Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of the Swirler Angle and Aspect Ratio of Nozzle on the Mean Velocity and SMD of Twin Sprays

노즐의 스월러각과 형상비가 이중분무의 평균속도와 입경의 크기에 미치는 영향

  • 김영진 (부산대학교 대학원 기계공학과) ;
  • 정지원 (부산대학교 기계기술연구소) ;
  • 최경민 (부산대학교 기계공학부) ;
  • 김덕줄 (부산대학교 기계공학부)
  • Published : 2004.11.01
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Abstract

The purpose of this study is to investigate the effect of swirler angle and the aspect ratio of swirl chamber of nozzle on the characteristics of single and twin spray. The characteristics of sprays have been investigated by measuring the spray angle, droplet size and velocity. Visualization of spray was conducted to obtain the spray angle and breakup process. The spray characteristics such as droplet size and velocity were measured by Phase Doppler Anemometry(PDA). It was found that the spray angle was increased with increasing the swirler angle. For both sprays, the axial velocity and SMD were decreased with increasing the swirler angle. It was also shown that the axial velocity and SMD were decreased with increasing the aspect ratio of swirl chamber, but for the twin spray, the axial velocity and SMD were not influenced significantly by the changing the aspect ratio of swirl chamber. The effect of swirler angle on the spray characteristics was greater than the aspect ratio of swirl chamber for single spray. The nozzle pitch was one of the important factors affecting the spray characteristics of twin spray.

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References

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