Abstract
The effect of dielectric barrier discharge(DBD) plasma to enhance the aerodynamic characteristics of an airfoil was numerical studied,and the effect of different discharge frequencies on the DBD plasma aerodynamic actuation was analyzed.The results show that DBD plasma flow control could restrain the flow separate phenomena at low Re condition.As the discharge frequency increased,the plasma induced flow velocity will increase first and then decrease.But the velocities oscillating frequencies change in no rules.The velocities oscillating frequencies will increase as the discharge frequencies increase at the range of multiple frequencies of vortex break off frequency or not.The lift drag ratio of airfoil will increase as the discharge frequencies increase,but the difference is tiny in different cases with different discharge frequencies.The oscillate frequencies of airfoil aerodynamic change in a big range as the discharge frequencies changed,and it have the same rule as the velocities oscillate frequencies in the air.
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