설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제25권5호
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  • Pages.246-254
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  • 2013
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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작은 수직관을 흐르는 기-액 슬러그 유동의 유동특성

Flow Characteristics of a Gas-Liquid Slug Flow in Small Vertical Tubes

  • 계석현 (한국교통대학교 대학원 기계공학과) ;
  • 김동선 (한국교통대학교 기계공학과)
  • Kye, Seok-Hyun (Department of Mechanical Engineering, Graduate School of Korea National University of Transportation) ;
  • Kim, Dong-Seon (Department of Mechanical Engineering, Korea National University of Transportation)
  • 투고 : 2013.02.19
  • 발행 : 2013.05.10
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초록

Some characteristics of nitrogen-water slug flow were optically measured, in vertical acrylic tubes of 2, 5 and 8 mm diameter. Bubble velocity, bubble and unit cell lengths were measured, by analyzing the light intensity signals from two sets of dot laser-infrared sensor modules mounted along the transparent tubes. Optical images of the bubbles were also taken and analyzed, to measure bubble shapes and liquid film thickness. It was found that the measured bubble velocities were in good agreement with the empirical models in the literature, except for those measured under high superficial velocity condition in the 2 mm tube. Bubble length was found to be the longest in the 2 mm tube, being 4 to 5 times those of the other tubes. Liquid film was found to have developed early in the 2 mm tube, which made the blunt shape of the bubble head. Liquid film thickness in the 8 mm tube was measured at almost twice those of the other tubes.

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참고문헌

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피인용 문헌

  1. Semi-Empirical Analysis of the Mass Transfer Characteristics of the Slug Flow in Vertical Mesoscale Tubes vol.26, pp.8, 2014, https://doi.org/10.6110/KJACR.2014.26.8.366