コロナ放電方式プラズマアクチュエーターの誘起流れに及ぼす電極形状の影響

抄録

Recently, plasma actuators have been attracting attention as devices for controlling fluids such as water and air. This device generates a fluid flow by electricity. The purpose of this study is to develop a fluid control device with a simple structure and versatility. In this study, the focus is on a corona discharge plasma actuator, which has high durability. The flow field and current values were investigated by experiments, and the flow field and electric field were investigated by numerical analyses. A flat plate and a wire electrodes were used as cathode to investigate the effect of electrode shape. A wedge electrode is used as anode. In the experiments, the induced flow is measured by PIV (Particle Image Velocimetry), and current value is also measured by a digital multimeter. PIV was performed on several cross sections to obtain the spatial velocity distribution. In the experiment, it was found that the flow velocity was faster for the flat electrode than for the line electrode. From the numerical analysis, the maximum electric field strength was obtained at the tip of the wedge electrode. On the other hand, the strong electric field was not concentrated at the flat and wire electrodes. Moreover, it was found that the flow spread from the tip of the wedge electrode.