Abstract
A series of numerical simulations were conducted to investigate the fan-shaped film holes with different transition surfaces on film cooling performance. In the present study, four fan-shaped holes different with the conventional fan-shaped hole were designed by changing the transition surfaces of fan-shaped holes, and their film cooling effectiveness and discharge coefficient were studied under the same boundary conditions. The results show that the anti-s-shaped fan-shaped hole has the best film cooling performance. Under the blowing ratio of M=1 and M=2, compared with the reference fan-shaped hole, the spatially-averaged cooling effectiveness is improved by 8.7% and 23.8% respectively, and the discharge coefficient is increased by 3.9% and 6.4% respectively.
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