Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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A CFD ANALYSIS ON THE INFLUENCE OF OPERATING CONDITIONS AND EJECTOR CONFIGURATION ON THE HYDRODYNAMICS AND MASS TRANSFER CHARACTERISTICS OF GAS-LIQUID EJECTOR

  • Utomo, Tony (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University) ;
  • Jin, Zen-Hua (Graduate School, Department of Mechanical and Precision Engineering, Gyeongsang National University) ;
  • Yi, Chung-Seub (Eco-Friendly Heat and Cold Energy Mechanical Research Team, Gyeongsang National University) ;
  • Jeong, Hyo-Min (School of Mechanical and Aerospace Engineering, Gyeongsang National University, Institute of Marine Science) ;
  • Chung, Han-Shik (School of Mechanical and Aerospace Engineering, Gyeongsang National University, Institute of Marine Science)
  • Published : 2007.05.30
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Abstract

The purpose of this paper is to study the influence of operating condition and ejector geometries on the hydrodynamics and on the mass transfer characteristic of ejector. The CFD results were validated with available experimental data. Flow field analyses and predictions of ejector performance were also carried out. Variation on the operating conditions was made by varying the gas-liquid flow rate ratio in the range of 0.2 to 1.2. The ejector configuration was also varied on the length to diameter ratio of mixing tube ($L_M/D_M$) in the range of 4 to 10. CFD studies show that at $L_M/D_M$ 5.5, the volumetric mass transfer coefficient increases with respect to gas flow rates. Meanwhile, at $L_M/D_M$ 4, the plot of volumetric mass transfer coefficient to gas-liquid flow rates ratio reach maximum at gas-liquid flow rates ratio of 0.6. This study also shows that volumetric mass transfer coefficient decrease with respect to the increase of mixing tube length.

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