A Comparison Between DBD and Corona Actuators with Non-Straight Electrodes

Abstract

An experiment about plasma actuators, both corona and DBD (Dielectric Barrier Discharge) types, is performed, in order to maximize their performance as flow control devices on aerodynamic airfoils at high angles of attack by acting on the electrodes shape. In particular, an innovative serrated geometry for the electrodes is investigated. Lift measurements on a NACA0015 are taken in the wind tunnel at 3 different Reynolds numbers ($Re \approx 35{,}000, 50{,}000, 70{,}000$). Results indicate that the new geometry may induce better performance than traditional straight edge configurations, both for corona and DBD. Furthermore, power considerations suggest that serrated geometry corona actuators are more efficient than DBD. Finally, the serrated geometry seems to increase the stability of corona discharge.