Numerical Analysis on Effects of the Boundary Layer Fence on the Three-dimensional Turbulent Flow in a Turbine Cascade

경계층내 장애물이 터빈 캐스케이드내 3차원 난류유동에 미치는 영향에 관한 전산해석

The objective of this study is to verify the secondary flow and the total pressure loss distribution in the boundary layer fence installed linear turbine cascade passage and to propose an appropriate height of the boundary layer fence which shows the best loss reduction among the simulated fences. In this study three different boundary layer fence was installed which have different height. This study was performed by numerical method and the result showed the boundary layer fence which has the height of one third of the inlet boundary layer thickness showed the best loss reduction rate.