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PLASMA FUNCTIONALIZATION OF MULTI-SCALE STRUCTURES

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PLASMA FUNCTIONALIZATION OF MULTI-SCALE STRUCTURES ( plasma-functionalization-multi-scale-structures )

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1. ABSTRACT The present study is focused on the enhancement of a aerodynamic aerofoil performance by using a thin plasma actuator to suppress flow separation occurring around the leading-edge. Methods which use small devices which need additional energy for modifying the flow are called active flow control methods. Despite of some operational costs, active flow control methods have as main advantage the possibility for power adjustments. From this point of view, the use of plasma actuators for flow control is an attractive alternative to promote the boundary layer profile modification. The absence of moving parts, and the easy manipulation of power, can be interesting characteristics for aerodynamic applications. The actuation was produced with a plasma sheet device (PSD) consisting in two bare electrodes flush mounted on the surface of the wing profile operated to obtain a discharge contouring the body in the inter electrode space. It is operated to obtain a discharge following the aerofoil leading edge curvature and acting over 90% of the span. The surface dielectric barrier discharge is used to modify velocity close to the leading edge by adding momentum to the boundary layer tangentially to the wall. later it should be tested in the wind tunnel for the different angle of attack and flow separation results to be performed. 1

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