Mixing Improvement by Manipulation of Multiple Jets Using Active Plasma Actuator
N. Benard1, A. Mizuno2, and E. Moreau1
1Institut PPRIME (CNRS UPR 3346, University of Poitiers, ISAE-ENSMA), France
2Department of Environmental and Life Sciences, Toyohashi University of Technology, Japan
Abstract- This study interests in defining a new type of dielectric barrier discharge actuator for mixing improvement purpose. The actuator is composed of a perforated plate (121 holes) housing embedded and printed electrodes between which a high voltage is applied. The electrode arrangement is such that the holes where the gas flows are surrounded by dielectric barrier discharges. Electrical and optical characterizations of the discharge are proposed to characterize the typical streamer and glow regimes that occur during one period of the AC sine voltage. Fast flow imaging by smoke streamwise and cross-sectional visualizations has been conducted for a freestream flow of 5 m/s. Depending on the applied frequency, the plasma discharge can modify the outer region where secondary instability takes place or it can produce a laminar-to-turbulent transition, enhancing then the mixing of the flow exiting from the perforated plate.
Keywords-Plasma actuator, dielectric barrier discharge, jet flow, flow control