Abstract
Direct numerical simulations are used to investigate the fundamental applicability of plasma actuators for controlling laminar breakdown in a swept-wing-type boundary-layer flow. Localized volume forcing, modelling the actuators, is used to favourably influence the three-dimensional nonlinear disturbance state with large-amplitude crossflow vortices (CFVs). One actuator per fundamental spanwise wavelength is positioned at a selected spanwise position to alter the CFVs and the associated flow field. It is found that both forcing against and in the direction of the crossflow can weaken the secondary instability and thus delay transition to turbulence.
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Acknowledgments
The financial support by the German Federal Ministry of Economics and Technology through the LuFo IV-4 project ‘AKSA’ and provision of computational resources by the Federal High Performance Computing Center Stuttgart (HLRS) are gratefully acknowledged.
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Dörr, P.C., Kloker, M.J. (2016). Control of the Secondary Crossflow Instability Using Plasma Actuators. In: Dillmann, A., Heller, G., Krämer, E., Wagner, C., Breitsamter, C. (eds) New Results in Numerical and Experimental Fluid Mechanics X. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 132. Springer, Cham. https://doi.org/10.1007/978-3-319-27279-5_9
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DOI: https://doi.org/10.1007/978-3-319-27279-5_9
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