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 According to Contraction Type

수축부 형상에 따른 풍동 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 : 2017.07.06
  • Accepted : 2017.09.22
  • Published : 2017.12.31
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Abstract

The steady-state, incompressible and three-dimensional numerical analysis was carried out to investigate the internal flow fields characteristics according to wind tunnel contraction type. The turbulence model used in this study is a realizable $k-{\varepsilon}$ modified from the standard $k-{\varepsilon}$ model. As a results, the distribution of the axial mean velocity components along the central axis of the flow model is very similar to the ASME and BE types, and the cubic and cosine types. 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 BS type contraction, but the smallest at cubic type contraction. The boundary layer thickness is the smallest in the cosine type contraction as the axial distance increases. The maximum turbulent kinetic energy in the test section is the smallest in the order of the contraction of cubic type and cosine type. Comprehensively, cubic type contraction is the best choice for wind tunnel performance, and cosine type contraction can be the next best solution.

Keywords

References

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Cited by

  1. Numerical Analysis on the Internal Flow Field Characteristics of Wind Tunnel According to the Change of Contraction Length vol.22, pp.4, 2018, https://doi.org/10.9726/kspse.2018.22.4.081