Effect of Upstream Ramp on Film-Cooling effectiveness

Several techniques have been studied to improve the effectiveness of film cooling. One of these techniques involves the use of small obstacles to the removal holes injection. Objective of this study is to determine numerically the effect of the geometry and the obstacle position lover injection holes inclined 35 °, for the case of a flat plate provided with multi perforated. The results showed that the cooling efficiency can be improved by over 40% compared to a simple cooling by film cooling; the best optimal values were derived have regarding the distance between the obstacle and the holes injection.