한국분무공학회지 (Journal of ILASS-Korea)

  • 제24권4호
  • /
  • Pages.185-193
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  • 2019
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  • 1226-2277(pISSN)
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  • 2288-9051(eISSN)
한국분무공학회 (Institute for Liquid Atomization and Spray Systems-Korea)
권호 표지
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기체주입 충돌제트의 분무특성에 관한 실험적 연구

Experimental Study on the Spray Characteristics of Aerated Impinging Jets

  • 이근석 (충북대학교 기계공학부) ;
  • 윤영빈 (서울대학교 기계항공공학부) ;
  • 안규복 (충북대학교 기계공학부)
  • 투고 : 2019.10.08
  • 심사 : 2019.11.27
  • 발행 : 2019.12.30
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초록

The effervescent atomizer is one of twin-fluid atomizers that aeration gas enters into bulk liquid and two-phase flow is formed in the mixing section. The effervescent atomizer requires low injection pressure and small amount of aeration gas, as compared to other twin-fluid atomizers. In this study, cold flow test was conducted to investigate the spray characteristics of aerated impinging jets. The present effervescent impinging atomizers were composed of the aerator device and like-on-like doublet impinging atomizer which had different impinging angles. To analyze the spray characteristics such as breakup length and droplet size distribution, the image processing technique was adopted by using instantaneous images at each flow condition. Non-dimensional parameters, induced by the homogeneous flow model, were used to predict the breakup length. The breakup length was decreased with the mixture Reynolds number and impinging angle increasing. The result of droplets showed that the size distribution was axisymmetric about the center of the injector and their diameter tended to decrease with increasing GLR.

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참고문헌

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