Flow control over a NACA 0012 airfoil using dielectric-barrier-discharge plasma actuator with a Gurney flap |
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Authors: | Li-Hao Feng Timothy N. Jukes Kwing-So Choi Jin-Jun Wang |
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Affiliation: | 1. Fluid Mechanics Key Laboratory of Education Ministry, Beijing University of Aeronautics and Astronautics, Beijing, 100191, China 2. Faculty of Engineering, University of Nottingham, University Park, Nottingham, NG7 2RD, UK 3. Research Centre for New Fuels and Vehicle Technology, AIST, Tsukuba, 305-8564, Japan
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Abstract: | Flow control study of a NACA 0012 airfoil with a Gurney flap was carried out in a wind tunnel, where it was demonstrated that a dielectric-barrier-discharge (DBD) plasma actuator attached to the flap could increase the lift further, but with a small drag penalty. Time-resolved PIV measurements of the near-wake region indicated that the plasma forcing shifted the wake downwards, reducing its recirculation length. Analysis of wake vortex dynamics suggested that the plasma actuator initially amplified the lower wake shear layer by adding momentum along the downstream surface of the Gurney flap. This enhanced mutual entrainment between the upper and lower wake vortices, leading to an increase in lift on the airfoil. |
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