Journal of computational fluids engineering (한국전산유체공학회지)

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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EVALUATION OF TURBULENCE MODELS IN A HIGH PRESSURE TURBINE CASCADE SIMULATION

고압터빈 익렬 주위 유동해석에서 난류모델의 영향 평가

  • El-Gendi, M.M. (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Lee, K.U. (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Chung, W.J. (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Joh, C.Y. (School of Mechanical Engineering, Univ. of Ulsan) ;
  • Son, C.H. (School of Mechanical Engineering, Univ. of Ulsan)
  • ;
  • 이경언 (울산대학교 기계공학부) ;
  • 정의준 (울산대학교 기계공학부) ;
  • 조창열 (울산대학교 기계공학부) ;
  • 손창호 (울산대학교 기계공학부)
  • Received : 2011.05.02
  • Accepted : 2012.08.18
  • Published : 2012.09.30
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Abstract

Steady flow simulations through a high pressure turbine guide vanes were carried out. The main objective of the present work is to study the performance of turbulence models on the steady flow prediction from aerodynamic and aerothermal points of view. Three turbulence models were compared, namely SST, k-${\omega}$ and ${\omega}$-Reynolds stress models. The laminar results were also compared. The comparison was done with emphasis on the isentropic Mach number and heat transfer coefficient along the blade, and total pressure loss in the wake region. The calculated isentropic Mach number showed reasonable agreement with experimental data along the blade surface for all three turbulent models. For the total pressure loss in the wake region, ${\omega}$-Reynolds stress model showed the best agreement with the experimental data. However, unless using an appropriate transition model, the heat transfer coefficients of all three turbulent models showed poor agreement with experimental data.

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References

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