直流高電圧を利用した三電極プラズマアクチュエータの作動メカニズムに関する研究

抄録

Tri-electrode plasma actuator (TED-PA) can generate stronger jet than that of conventional two-electrode type plasma actuator. The performance improvement of TED-PA is mainly contributed by body force generation around the DC electrode. In this study, in order to obtain knowledge to enhance the body force generation around DC electrode, we numerically analyze following three cases; without opposite electrode (two-electrode configuration), electrically-grounded opposite electrode, AC-powered opposite electrode. Discharge plasma behavior was simulated based on the three-fluid plasma model. As a result, the AC-powered opposite electrode can generate the strongest body force, and on the other hand, the case without opposite electrode generates no body force in the steady state. That is caused by different mechanism of maintaining DC discharge. In the case of grounded opposite electrode, the DC discharge is maintained by secondary electron emission from the grounded opposite electrode. In the case of the AC-powered electrode, it is maintained by high density plasmas supplied by the dielectric barrier discharge around the AC electrode.