抄録
We have developed a two-dimensional numerical code based on the Particle-In-Cell with Monte Carlo Collision (PIC-MCC) method, with representative reactions for N2 to perform discharge dynamics in a dielectric barrier discharge (DBD) plasma actuator and to estimate generated force resulting from ion-neutral collision. Depending on the sign of the applied voltage, discharge pro-cess is observed as streamer mode or glow mode in the plasma actuator. The dielectric surface potential drastically changes as time advances due to the effect of the generated plasma on the electric field. These flow properties should be included appropriately in a macroscopic model for computational fluid dynamics (CFD). Moreover, the plasma generation process and high current generation are examined for an alternating voltage which increases the electric potential of the exposed electrode respect to the buried electrode from negative to pos-itive (positive-going). After the voltage phase changes, the discharge process changes from glow mode to streamer mode; the high current observed in past experiments may originate from this transition of the discharge mode.
