Airfoil Flow Experiment on the Duty Cycle of DBD Plasma Actuator

Abstract

The parameters of DBD (Dielectric Barrier Discharge) plasma actuator with burst wave (duty cycle) are investigated by the low speed wind tunnel experiment for airfoil. In this paper, influence of burst frequency f, input voltage sine wave frequency fbase and burst ratio BR on the stall control are discussed. The experiments are conducted with the conditions Rec=44,000, 63,000. The actuator is applied to NACA0015 airfoil and then flow-fields around the airfoil are visualized by the smoke wire method and pressure around its surface is measured by the multipoint steady pressure measurement. The results show that within the present experimental conditions, the higher f and fbase are more effective in the separation control and the smaller BR has the stronger separation control capability in spite of less input energy. In present conditions, the optimum dimensionless burst wave frequency F is 9.1. This result shows the same tendency as the result of Sidorenko, et al.