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김영목(Y.-M. Kim),손호재(H.-J. Son) 한국전산유체공학회 1997 한국전산유체공학회 학술대회논문집 Vol.1997 No.-
Numerical investigations of three-dimensional laminar flows in a 90-degree T-branch of square cross-section were carried out. The incompressible Navier-Stokes equations in generalized curvilinear coordinates, using a pseudocompressibility approach for continuity equation, were solved by the implicit, approximately factored scheme of Beam and Warming in the framework of multi-block grids. Computation of a twodimensional bifurcation flow was in excellent agreement with experimental measurements available in the literature for stream wise velocity profiles in the main duct. Then, effects of branch to main flow rate ratios and inlet Reynolds numbers on the main duct flowfields were studied in the laminar range. The computed results revealed significant influence of the branch flow rate ratio on the flow characteristics of T-branch.
Circular-to-Rectangular Transition Duct 내부의 3차원 유동장에 관한 연구
조수용(S. Y. Cho),정희택(H. T. Chung),손호재(H. J. Son) 한국전산유체공학회 1999 한국전산유체공학회지 Vol.3 No.2
Predictive behaviors by the extended k-ε turbulence model and the standard k- e turbulence model are compared. Grid dependency is tested with the H-type grid as well as the O-type grid. Computations have been performed on a circular-to-rectangular transition duct. The Reynolds number is 390,000 based on the bulk velocity at the inlet. The computed axial velocity contours. transverse velocity profiles, static pressure contours, peripheral skin friction coefficient, peripheral wall static pressure distributions and turbulence kinetic energy have been compared with experimental results. The computed results obtained with the extended k-ε turbulence model show better agreement with experimental results than those obtained with the standard k-ε turbulence model. Comparing to the computed results obtained with the H-type grid and O-type grid, those with H-type grid seem to agree well with experimental results.
Circular-to-Rectangular Transition Duct 내부의 3차원 유동장에 관한 연구
조수용(S. Y. Cho),정희택(H. T. Chung),손호재(H. J. Son) 한국전산유체공학회 1999 한국전산유체공학회지 Vol.3 No.2
Predictive behaviors by the extended k-ε turbulence model and the standard k- e turbulence model are compared. Grid dependency is tested with the H-type grid as well as the O-type grid. Computations have been performed on a circular-to-rectangular transition duct. The Reynolds number is 390,000 based on the bulk velocity at the inlet. The computed axial velocity contours. transverse velocity profiles, static pressure contours, peripheral skin friction coefficient, peripheral wall static pressure distributions and turbulence kinetic energy have been compared with experimental results. The computed results obtained with the extended k-ε turbulence model show better agreement with experimental results than those obtained with the standard k-ε turbulence model. Comparing to the computed results obtained with the H-type grid and O-type grid, those with H-type grid seem to agree well with experimental results.