An optimization study was conducted to investigate the film-cooling performance caused by a bump located downstream of the film-cooling hole. To take advantage of the Coanda effect and improve coolant adherence on the wall, six geometrical design variables have been studied and optimized to enhance film-cooling effectiveness. The optimization goals were to maximize the area-averaged film-cooling effectiveness and to minimize the total pressure loss coefficient. In the intervals of the studied parameters, any modification of the geometry that tends to increase the height bump will make it possible to considerably improve the film-cooling effectiveness. This increase can be carried out by the increase of one of the following parameters: the bump radius or the flat zone slope. The distance between the injection hole and the bump has no effect on the cooling performance.
Computational Optimization of Coanda Effect on Film-Cooling Performance
Journal of Thermophysics and Heat Transfer ; 29 , 4 ; 757-765
2014-10-28
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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