Abstract
The properties of jets produced by dielectric barrier discharge plasma actuators (DBD-PA) have been investigated by using a particle image velocimetry (PIV) system. A DBD-PA with a doughnut-shaped electrode generates annular wall normal jets by applying high voltage (V) and high frequency (f_p) signals between top and bottom electrodes. Variations of velocity distributions of wall normal jets affected by voltage surge velocities (dV/dt) are estimated in the range of 150≤dV/dt≤250 volts/μsec. The inclined and oscillating wall normal jets can be formed by using a DBD-PA with an opposing pair of electrodes and applying independently signals between their electrodes.
