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

The Korean Society of Mechanical Engineers (대한기계학회)
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Spray characteristics of twin-fluid atomization using external-mixing sonic nozzles

외부혼합형 음속노즐을 사용한 2유체 미립화의 분무특성

  • Park, Byeong-Gyu (Dept.of Mechanical Engineering, Graduate School of Seoul National University) ;
  • Lee, Jun-Sik (Dept.of Mechanical Engineering, Seoul National University)
  • 박병규 (서울대학교 대학원 기계공학과) ;
  • 이준식 (서울대학교 기계공학과)
  • Published : 1997.01.01
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Abstract

Spray characteristics of external mixing sonic twin-fluid atomization nozzles are investigated experimentally. Particle sizes are measured by the Fraunhofer diffraction method using the Malvern particle analyzer, and their radial distributions are obtained using the tomographical transformation technique. The spatial distribution of SMD shows that the drop size increases in the radial direction at a fixed liquid flow rate, and the distribution is getting uniform rapidly as the atomizing gas pressure increases. The SMD decreases as the liquid flow rate increases at a fixed GLR. It is found that the atomization efficiency of the flush type sonic nozzle is superior to that of protrusion type. The effect of laser beam diameter of the particle analyzer on the spatial SMD distribution is minor at present experimental conditions.

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