Ionic wind characteristics of electromagnetic plasma micro-actuator

초록

We propose a novel electromagnetic device that suppresses electrical coupling by minimizing the coupling area between the AC and DC voltage sources, while enabling stable ionic wind generation at a significantly reduced voltage. Lorentz-force-driven carrier injection allows plasma formation across an 8 mm gap at 900 V-an order of magnitude lower than the breakdown voltage for conventional two-electrode devices. The induced airflow is characterized using particle image velocimetry (PIV), revealing flow propagation profile along the substrate and a maximum velocity of 0.4 m/s at 1 W plasma power. Momentum flux analysis of ions and neutral molecules indicates that ionic wind generation arises from both volumetric electrohydrodynamic body force and enhanced jet dynamics. The effectiveness of the ionic wind is further validated using a micro thermal anemometer, and an optimized plasma generation scheme for efficient thermal management is presented.

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