Print Email Facebook Twitter Experimental control of swept-wing transition through base-flow modification by plasma actuators Title Experimental control of swept-wing transition through base-flow modification by plasma actuators Author Yadala, Srikar (TU Delft Aerodynamics; Université de Poitiers) Hehner, M.T. (TU Delft Aerodynamics; University of Stuttgart) Serpieri, J. (TU Delft Aerodynamics) Benard, Nicolas (CNRS-Université de Poitiers-ISAE-ENSMA) Dörr, Philipp C. (University of Stuttgart) Kloker, Markus J. (University of Stuttgart) Kotsonis, M. (TU Delft Aerodynamics) Date 2018-04-13 Abstract Control of laminar-to-turbulent transition on a swept-wing is achieved by base-flow modification in an experimental framework, up to a chord Reynolds number of 2.5 million. This technique is based on the control strategy used in the numerical simulation by Dörr & Kloker (J. Phys. D: Appl. Phys., vol. 48, 2015b, 285205). A spanwise uniform body force is introduced using dielectric barrier discharge plasma actuators, to either force against or along the local cross-flow component of the boundary layer. The effect of forcing on the stability of the boundary layer is analysed using a simplified model proposed by Serpieri et al. (J. Fluid Mech., vol. 833, 2017, pp. 164–205). A minimal thickness plasma actuator is fabricated using spray-on techniques and positioned near the leading edge of the swept-wing, while infrared thermography is used to detect and quantify transition location. Results from both the simplified model and experiment indicate that forcing along the local cross-flow component promotes transition while forcing against successfully delays transition. This is the first experimental demonstration of swept-wing transition delay via base-flow modification using plasma actuators. Subject boundary layer controlboundary layer stabilityinstability control To reference this document use: http://resolver.tudelft.nl/uuid:813e16e4-9a17-4ffe-b5b9-58c9837604ec DOI https://doi.org/10.1017/jfm.2018.268 Embargo date 2018-10-01 ISSN 0022-1120 Source Journal of Fluid Mechanics, 844 Part of collection Institutional Repository Document type journal article Rights © 2018 Srikar Yadala, M.T. Hehner, J. Serpieri, Nicolas Benard, Philipp C. Dörr, Markus J. Kloker, M. Kotsonis Files PDF Yadala_JFMr_2018.pdf 974.16 KB Close viewer /islandora/object/uuid:813e16e4-9a17-4ffe-b5b9-58c9837604ec/datastream/OBJ/view