Abstract
Measurements of the flow field and film cooling effectiveness downstream of a two-dimensional inclined slot were made. A two-dimensional numerical model solving the transport equations in curvilinear orthogonal coordinate system was developed to simulate film cooling process. Comparisons were made between numerical and experimental results. The variation of the downstream film cooling effectiveness with changing mass flow ratio, slot angle and upstream turbulent boundary layer were investigated numerically. The computational predictions of the film cooling effectiveness are consistently higher than the measured values. The difference suggests that the numerical turbulent mixing is lower than that found experimentally, and the turbulence modelling needs to be improved. In the region close to the slot exit the flow is highly unstable and the exact measurements are difficult.
Published Version
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