Abstract
Tri-Electrode Plasma Actuator utilizing Sliding Discharge (TED-SDPA) can generate stronger jet than that by conventional two-electrode type Plasma Actuator. However, the detail performance characteristics of TED-SDPA have not been clarified yet. In this study, the consumption power and the thrust of TED-SDPA were numerically analyzed for negative and positive DC voltage. Discharge plasma dynamics was simulated based on a three-fluid plasma model, and the flow field was simulated based on the incompressible Navier-Stokes equations with the source terms which are from the EHD force field obtained in the plasma simulation. As a result, in the both cases of positive and negative DC voltage, TED-SDPA induced stronger jet than that in the case of 0.0 kV DC voltage. In terms of the thrust to power ratio, thrust efficiency increases with lower negative DC voltage. On the other hand, with higher positive DC voltage, the thrust efficiency decreased when the vertical thrust started to be generated. However the thrust efficiency drastically increased with much higher positive DC voltage. The efficiency drastically improvement was due to increasing of absolute thrust and not changing consumption power.
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