Pulsed-DC波形のパラメータがプラズマアクチュエータの性能に与える影響の実験的調査

抄録

Dielectric barrier discharge plasma actuator (DBDPA) is one of active flow control devices. However, the enhancement of the induced jet is indispensable for application to high Reynolds number flow. In 2016, McGowan et al. reported that a Pulsed-DC voltage waveform can drastically improve the jet thrust. The objective of this study is to experimentally investigate the flow field around the plasma actuator in which the top electrode is powered by the Pulsed-DC waveform and the bottom electrode is electrically grounded. The flow field is measured for the Pulsed-DC waveform with different relaxation time of pulsed voltage using PIV measurement. As a result, we show that longer relaxation time makes thicker induced jet and higher thrust. On the other hand, the maximum flow velocity becomes lower. The flow velocity obtained by the Pulsed-DC waveform is much lower than that by the sinusoidal waveform.