끝벽의 형상이 터빈 노즐안내깃 캐스케이드내 3차원 유동에 미치는 영향에 관한 연구

Experimental Study on Effect of the Contoured Endwall on the Three-Dimensional Flow in a Turbine Nozzle Guide Vane Cascade

The objective of this study is to document the secondary flow and the total pressure loss distribution in the contoured endwall installed linear turbine nozzle guide vane cascade passage and to propose an appropriate contraction ratio of the contoured endwall which shows the best loss reduction among the simulated cases. In this study, three different contraction ratio of contoured endwalls have been tested. This study was performed by experimental method and when the contoured endwall has the contraction ratio of 0.17 on exit height the results showed the best loss reduction.