Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Numerical Analysis on the Internal Flow Field Characteristics of Wind Tunnel Contractions with Morel's Equation

모렐 식을 갖는 풍동수축부의 내부유동장 특성에 대한 수치해석

  • Kim, Jang-Kweon (Dept. of Power System Engineering, Kunsan National University) ;
  • Oh, Seok-Hyung (School of Mechanical Engineering, Kunsan National University)
  • 김장권 (군산대학교 동력기계시스템공학과) ;
  • 오석형 (군산대학교 기계공학부)
  • Received : 2017.06.29
  • Accepted : 2017.12.20
  • Published : 2018.02.28
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Abstract

The steady-state, incompressible and three-dimensional numerical analysis was carried out to evaluate the internal flow fields characteristics of wind tunnel contractions made by Morel's curve equations. The turbulence model used in this study is a realizable ${\kappa}-{\varepsilon}$ well known to be excellent for predicting the performance of the flow separation and recirculation flow as well as the boundary layer with rotation and strong back pressure gradient. As a results, when the flow passes through the interior space of the analytical models, the flow resistance at the inlet of the plenum chamber is the largest at $Z_m=300$, 400 mm, but the smallest at $Z_m=700mm$. The maximum turbulence intensity in the test section is about 2.5% when calculated by the homogeneous flow, so it is improved by about 75% compared to the 10% turbulence intensity at the inlet of the plenum chamber due to the contraction.

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References

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