Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Analysis of High-Reynolds-Number Flow around Axisymmetric Body

축대칭체 주위 고 레이놀즈수 유동에 대한 수치해석

  • Choi, Jung-Kyu (Dept. of Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Kim, Hyoung-Tae (Dept. of Naval Architecture and Ocean Engineering, Chungnam National University)
  • 최정규 (충남대학교 선박해양공학과) ;
  • 김형태 (충남대학교 선박해양공학과)
  • Published : 2008.12.31
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Abstract

In this paper, numerical analysis based on the RANS equation and the Realizable ${\kappa}-{\varepsilon}$ turbulence model is carried out for flows around an axisymmetric body at three Reynolds numbers($1.22{\times}10^7$, $1.0{\times}10^8$, $1.5{\times}10^8$) and the numerical results are compared with experiments data. Computed velocity distributions agree well with experiments as the Reynolds number increases. Pressure distributions agree well with the results of the potential flow except the tail region but differ from experiments for the parallel middle body as well as tail region. Pressure gradients show a good agreement with those of potential flow and experiment except the tail region. Friction coefficients show that the numerical results generally are lower than the experimental results estimated from the measured velocity. The difference of friction coefficients between the calculation and the experiment increases with growing of a boundary layer.

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References

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