An analysis of vertical axis wind turbines, subjected to flow control by means of leading-edge slot blowing, was
performed.The analysiswas based on blade-elementmomentumtheory that included experimental data acquired on
a NACA 0012 airfoil subjected to a wide range of blowing momentum coefficients. Two methods of control were
considered: single-sided slot blowing that was active on either the upwind or downwind halves of the turbine disk or
double-slot blowing applied on both upwind and downwind sides. The net turbine power output was calculated by
accounting for the pumping power required to drive the slot-blowing system, including secondary systemlosses. The
systemcould be optimized by employing blowing selectively belowpredetermined blade tipspeed towindspeed ratios
or above the blade stall angle only. The results show significant potential for flow control by jet blowing i