Oscillatory blowing control numerical simulation of airfoil flutter by high-accuracy method

It is known that oscillatory blowing can be used to delay flow separation and stall. The oscillatory blowing technique is applied to control of the airfoil's flutter. A high accuracy fluid-structure coupling numerical method is used. The numerical results show that the steady blowing will weaken the flutter. However, the excess blowing will decrease the lift coefficient. The best blowing velocity can be found by the present numerical method. The influence of the frequency of the oscillatory blowing on the airfoil's vibration is also studied. The numerical results show that the oscillatory blowing is more efficient than steady blowing.