Abstract
Tri-electrode plasma actuator (TE-PA) with DC high voltage can generate stronger jet than that of conventional two-electrode type plasma actuator. In this study, the characteristics of the thrust and body force are numerically analyzed for two cases of the AC voltage value. The discharge plasma evolution is simulated based on the three-fluid plasma model, and the flow field is simulated based on the incompressible Navier-Stokes equations with the source terms which are from the body force field obtained in the plasma simulation. As a result, for the case of positive DC voltage, the DC voltage characteristics of the thrust are not affected by AC voltage value. On the other hand, for the case of negative DC voltage, the thrust starts to change at smaller DC voltage value with higher AC voltage. However, from the viewpoint of the body force, higher AC voltage generates the negative body force at lower DC voltage value regardless of the its polarity..
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