Experimental Study on Dynamic Stall of Airfoil Controlled by Pulsed Plasma Actuation in Wind Tunnel
In order to explore the effect of AC-DBD and NS-DBD actuation on dynamic stall control of airfoil,a wind tunnel experiment based on SC-1095 airfoil was designed.First,based on the static airfoil stall characteristics with Reynolds number of 6.5×105,the dynamic stall state was set.In the dynamic stall experiment of airfoil,the inflow velocity U∞=30m/s and the movement profile of airfoil α(t)=16°+8°sin(ωt)kept unchanged.The results of dynamic stall controled by AC-DBD and NS-DBD actuation were compared under the same actuation parameter combination and the same power input conditions.It is found that both AC-DBD and NS-DBD actuation can reduce the area of the dynamic lift hysteresis loop of the airfoil,reduce the nose-down moment and improve the resistance characteristics under the parameters set by the experiment.However,the control effect of NS-DBD actuation is better than that of AC-DBD actuation under the same actuation parameter combination or the same power input,which reflects the advantage of NS-DBD actuation in the control of dynamic stall of airfoil.
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