Abstract
This study presents a novel film-cooling hole structure inspired by “Prince Rupert's Drops.” It performs numerical simulations of a flow field with one cylindrical hole and four different Rupert-shaped film-cooling holes, analyzing the effectiveness of these five film-cooling holes on cooling flat plates. The cooling effectiveness of the Rupert-shaped film-cooling holes significantly outperform that of the cylindrical hole at three blowing ratios. The maximum increase in the area-weighted average cooling effectiveness of the Rupert-shaped holes is over 9 times greater than that of the cylindrical hole. The flow structures of the five holes were compared and analyzed, and the effectiveness of the Rupert-shaped film holes in weakening the kidney-shaped vortex generated by the coolant was confirmed. Furthermore, the Rupert-shaped holes improve the attachment of the film to the wall surface. Further analysis indicates that the shape of the Rupert-shaped holes is crucial for enhancing their cooling effectiveness.
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