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Several studies have shown that a surface corona discharge may be used as an electrohydrodynamic actuator in order to control the airflow around profiles. For a few years, our laboratory has been working on this subject, specifically in the case of a DC corona discharge. The present paper deals with experimental work on DC and pulsed surface non-thermal plasmas produced between two wire electrodes flush mounted on the surface of a PMMA (polymethyl-methacrylate) insulating flat plate. The goal is to optimize the plasma actuator in terms of electro-mechanical efficiency in the absence of an external free airstream. First, electrical properties (such as discharge current versus applied voltage and discharge current versus time) of these different discharges are observed. Secondly, the time-averaged ionic wind induced by DC coronas and pulsed coronas is measured by means of a small diameter tube connected to a micro manometer.

DC and Pulsed Surface Corona Discharge along a Dielectric Flat Plate in Air: Electrical Properties and Discharge-Induced Ionic Wind