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The Gasoline Atomization Characteristics and Static Pressure Distribution of Tapered Nozzle Swirl Spray

경사노즐 선회분사기의 가솔린 미립화 및 분무 내부 압력 분포

  • 문석수 (한국과학기술원 기계공학과) ;
  • 최재준 (한국에너지기술연구원) ;
  • 배충식 (한국과학기술원 기계공학과)
  • Published : 2007.03.01

Abstract

The static pressure distribution, atomization characteristics and velocity distribution of tapered nozzle swirl spray is analyzed and then compared with original swirl spray. The static pressure distribution inside the swirl spray is measured using a piezoresistive pressure transducer. Phase Doppler anemometry (PDA) is applied to measure and analyze the droplet size and velocity distribution of tapered nozzle and original swirl spray. The static pressure inside the spray shows the lower value compared to the atmospheric pressure and this pressure drop is getting attenuated as the taper angle is increased. The droplet size of tapered nozzle spray shows similar value compared to the original swirl spray at the horizontal mainstream while it shows increased value at vertical mainstream. The deteriorated atomization characteristics of tapered nozzle spray is improved by applying high fuel temperature injection without causing the spray collapse. The velocity results show that the larger portion of fuel is positioned with higher injection velocity, and the smaller portion of fuel is positioned with lower injection velocity with causing spatially non-uniform mixture distribution.

Keywords

References

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