A DC corona discharge on a flat plate to induce air movement |
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Institution: | 1. Laboratoire de Mécanique et d’Energétique, 8, Rue Leonard de Vinci, 45072 Orléans Cedex 2, France;2. GREMI, UMR 6606 CNRS/Université d’Orléans, 14, Rue d’Issoudun, 45072 Orléans Cedex 2, France |
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Abstract: | This paper describes a DC surface corona discharge designed to modify the airflow around a flat plate. The electrode configuration consisted of two thin copper layers placed on each side of the plate's attack edge. Discharge optical measurements with a photomultiplier tube indicated that the light emitted by the plasma is pulsating at a frequency that increases with applied voltage. Moreover, with voltage higher than a threshold value, the electric discharge changes regime with brighter pulses. This discharge also induced an “ionic wind” whose velocity was measured with a pressure sensing probe (up to 1 m/s). Experiments with the particle image velocimetry system in a subsonic wind tunnel showed that this discharge can reduce the separated airflow on the flat plate for a flow of 14 m/s (Reynolds number of 187,000). |
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