Control of the Jet Induced by the Plasma Actuators (Effect of the Applied Voltage Characteristics on the Jet Direction)

Abstract

The effects of voltage waveform characteristics on the flow induced by using a dielectric barrier discharge plasma actuator (DBD-PA) have been investigated in this study. It is known that the flow is induced in the direction from the upper electrode to the bottom electrode, then tangential one-way flow can be generated by using DBD-PA with asymmetric electrodes. We found, however, that it is possible to control the flow in certain conditions when offset voltages with a square wave are varied. Setting the negative offset, the flow is reversed from the bottom electrode to the upper electrode by applying square wave. It should be noted that it is not reversed by sine waves even with same amplitudes and frequencies. Our experimental results indicate that the voltage surge velocity is important to realize reversed flow induced by DBD-PA.