Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Numerical Study of the Turbulent Flow Characteristics in the Inlet Transition Square Duct Based on Roof Configuration

4각 안내덕트 루프형상에 의한 난류특성변화 수치해석

  • 유근종 (창원대학교 기계설계공학과) ;
  • 최훈기 (창원대학교 기계설계공학과) ;
  • 최기림 (창원대학교 대학원 기계설계공학과) ;
  • 신병주 (창원대학교 대학원 기계설계공학과)
  • Published : 2009.07.01
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Abstract

Configuration of the inlet transition square duct (hereinafter referred to as "transition duct") for heat recovery steam generator (hereinafter referred to as "HRSG") in combined cycle power plant is limited by the construction type of HRSG and plant site condition. The main purpose of the present study is to analyze the effect of a variation in turbulent flow pattern by roof slop angle change of transition duct for horizontal HRSG, which is influencing heat flux in heat transfer structure to the finned tube bank. In this study, a computational fluid dynamics(CFD) is applied to predict turbulent flow pattern and comparisons are made to 1/12th scale cold model test data for verification. Re-normalization group theory (RNG) based k-$\epsilon$ turbulent model, which improves the accuracy for rapidly strained flow and swirling flow in comparison with standard k-$\epsilon$ model, is used for the results cited in this study. To reduce the amount of computer resources required for modeling the finned tube bank, a porous media model is used.

Keywords

References

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  2. Numerical Study on Heat Transfer Characteristics of Turbulent Flow in Transition Duct vol.35, pp.9, 2011, https://doi.org/10.3795/KSME-B.2011.35.9.923