2차원 아음속 압축기 익렬유동에서의 난류모델 효과에 관한 연구

The eddy viscosity turbulence models were applied to predict the flows through a cascade, and the prediction performances of turbulence models were assessed by comparing with the experimental results for a controlled diffusion(CD) compressor blade. The original k-ω turbulence model and k-ω shear stress transport(SST) turbulence model were used as two-equation turbulence model which were enhanced for a low Reynolds number flow and the Baldwin-Lomax turbulence model was used as algebraic turbulence model. Farve averaged Navier-Stokes equations in a two-dimensional, curvilinear coordinate system were solved by an implicit, cell-centered finite-volume computer code. The turbulence quantities are obtained by lagging when the mean flow equations have been updated. The numerical analysis was made to the flows of CD compressor blade in a cascade at three different incidence angles (40, 43.4, 46 degrees). We found the reversion in the prediction performance of original k-ω turbulence model and k-ω SST turbulence model when the incidence angle increased. And the algebraic Baldwin-Lomax turbulence model showed inferiority to two-equation turbulence models.