DBDプラズマアクチュエータにおける運動量輸送過程の流体モデルに基づいた数値シミュレーション(電磁流体,一般講演)

概要

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Discharge plasma evolution in the DBD plasma was simulated by the simplest fluid model; electron and single positive ion species were considered and all ionization is the electron-impact ionization. The simulation result in the case of triangular applied voltage waveform was qualitatively compared with experimental results reported by earlier works in terms of discharge current waveforms, time history of the EHD force and discharge plasma expansion. The simulation result showed the same characteristics in the discharge current waveform and the discharge plasma expansion as those observed by the experiment. These characteristics were investigated in detail by separately simulating the positive and negative-going voltage phase. When positive ramp voltage was applied, the streamer discharge was periodically formed and the discharge plasma expands step-by-step with time. Periodic breakdown and step-by-step plasma expansion also occurred during the negative-going voltage. However the streamer was not formed and the breakdown frequency was much higher.
2010-09-09