Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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THREE-DIMENSIONAL FLOW COMPUTATION AND PERFORMANCE CHARACTERISTICS ANALYSIS OF PROPELLERS FOR WATER TREATMENT MIXER

수처리 교반기용 프로펠러의 3차원 유동 전산 해석 및 성능 특성 분석

  • Bae, Y.G. (School of Mechanical Engineering, Korea Univ.) ;
  • Kim, D.H. (School of Mechanical Engineering, Korea Univ.) ;
  • Hwang, S.T. (School of Mechanical Engineering, Korea Univ.) ;
  • Moon, Y.J. (School of Mechanical Engineering, Korea Univ.)
  • Received : 2015.02.09
  • Accepted : 2015.03.06
  • Published : 2015.03.31
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Abstract

In this study, the characteristics of water treatment mixer with various propeller profiles are numerically invesitgated. The computation was conducted by solving the incompressible Navier-Stokes equations on unstructured tetrahedral elements with k-${\varepsilon}$ turbulence model. It was found that the spreading angle and swirl magnitude of the jet are important factors for the mixer efficiency, since they clearly characterize the propeller and the frontal surface area of the propeller but not so much affected by the skew angle if it exceeds 30 degrees. The case1 and case2 models are found to show the best propeller efficiency. The case2 with low blade angle, however, requires the lowest power input for the same discharge capacity as the case1.

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