한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
권호 표지

초음속 기저부 유동에서 ${\kappa}-{\varepsilon}$ 난류 모델에 대한 와점성 계수의 영향

INFLUENCE OF EDDY VISCOSITY COEFFICIENT ON ${\kappa}-{\varepsilon}$ TURBULENCE MODEL FOR SUPERSONIC BASE FLOW

  • 박수형 (건국대학교 항공우주정보시스템공학과) ;
  • 사정환 (건국대학교 대학원 항공우주정보시스템공학과) ;
  • 김지웅 (건국대학교 대학원 항공우주정보시스템공학과) ;
  • 권장혁 (한국과학기술원 항공우주공학) ;
  • 김창주 (건국대학교 항공우주정보시스템공학과)
  • 발행 : 2008.09.30
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초록

A supersonic base flow is computed to investigate the effect of the eddy viscosity coefficient to the linear ${\kappa}-{\varepsilon}$ turbulence models. Slight modifications to the eddy viscosity coefficient, which are based on the realizability condition, are given to the Launder-Sharma turbulence model so that present models satisfy the realizability condition. Numerical results for supersonic base flow show that turbulence models with the weaky-nonlinear eddy viscosity coefficient can lead to reasonable enhancements in the prediction of the velocity and turbulent kinetic energy profiles.

키워드

참고문헌

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