In this study, the effects of acoustic excitation frequency on flow over an NACA 2415 airfoil were determined, and all of the experiments were done both with and without the presence of the acoustic excitation. The acoustic excitation was applied for a range of angles of attack (0°–25°)...
This study is a detailed experimental investigation on aerodynamics of a NACA2415 aerofoil by varying angle of attack from −12° to 20° at low Reynolds number flight regimes (0.5×105 to 3×105). For this investigation, pressure distributions over the aerofoil were measured using a system ...
Bubble lengths of approximately 14% of airfoil chord are reduced by 90% through application of time-periodic blowing and suction ahead of the bubble at a frequency of 0.605 for the 8° angle of attack case. Lift to drag ratios are also improved but sensitivity to the frequency is evident. ...