Abstract
The driving parameter of SDBD plasma actuator for the effective flow control was explored. Current exploration focused on the modulation frequency and several relevant parameters for unsteady PWM drive of the actuator for drag reduction of the circular cylinder at 8〜12m/s of the freestream velocity. Parametric experiment showed that the principal variable to determine the performance of the actuator was the modulation frequency of the PWM actuation. Higher (Strouhal number is greater than 0.7) PWM modulation frequency has better actuation performance that can reduce the drag of the cylinder model up to 45%. Contrarily negative drag reduction was observed when the PWM modulation frequency was set close to the natural frequency of the wake vortex of the cylinder model.
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