Hybrid RANS/LES Simulation of Subsonic Cavity Flow

Hybrid RANS/LES 방법을 이용한 이음속 공동 유동의 수치적 모사

  • 장경식 (한국과학기술원 한국우주공학과) ;
  • 박승오 (한국과학기술원 항공우주공학과) ;
  • 최석기 (한국과학기술원 항공우주공학과)
  • Published : 2004.06.01

Abstract

A numerical simulation of an incompressible cavity flow is conducted using the hybrid turbulence model. The model adopted is a modified type of DES using k- ε two-equation model. Cavity geometry and flow condition are based on Cattafesta's experiment. Computational results are compared with the results of Cattafesta's experiment. The simulation successfully predicts the oscillatory features and the Strouhal number of the oscillation compares very favorably with that of the dominant mode of experimental data. Vorticity contours obtained from the simulation data are consistent with the smoke visualization of the Cattafesta's experiment. The coherent structures of cavity flow are also investigated using Q criterion.

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