Abstract
This paper addresses the topic of the influence of the profile of a plate on a turbulent flow. The study is based on numerical results obtained by URANS and hybrid (DDES) turbulence modeling and compared with experimental results. The flat plate has an aspect ratio of 20 (length over thickness) and the edges are not smoothed. The plate includes Shape Memory Alloys (SAM), which allows it to arch under the effect of an electric voltage. The deformation by the material corresponds to a beam deformation and is implemented in the numerical simulation according to this definition. The Reynolds number is \(Re = 200{,}000\), which led to a turbulent flow with a Von Karman vortex shedding and Kelvin Helmotz instabilities in the shear layer. The simulations are performed with several turbulence models: k-\(\epsilon \)-OES, k-\(\omega \)-BSL-OES, k-\(\omega \)-DDES-BSL-OES, k-\(\omega \)-DDES-SST-Menter. These models are used in a first step to determine the three-dimensional flow around the plate plane inclined by \(10^{\circ }\). The behavior of the flow are found similar between experiment and numerical simulations. The purpose of the curve shape by deformation is then compared to a linear form by rotation of the plate. The curved shape provides the same lift coefficient with less required deformation and thus with a lower drag coefficient and also a lower frequency. The dynamic deformation is slow compared to the freestream velocity, it weakly affects the coefficients and frequencies compared to linear shape.
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Acknowledgments
The present work was supported by the Foundation STAE-RTRA, research programm EMMAV. The authors would like to acknowledge the following high performance computing centers for supporting this work by providing scientific support and access to computing resources: CINES/GENCI, PRACE and the Direction Informatique of the University of Strasbourg.
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Deloze, T. et al. (2016). Dynamic Effect of an Active Deformable Flat Plate on Its Turbulent Flow. In: Braza, M., Bottaro, A., Thompson, M. (eds) Advances in Fluid-Structure Interaction. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 133. Springer, Cham. https://doi.org/10.1007/978-3-319-27386-0_19
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DOI: https://doi.org/10.1007/978-3-319-27386-0_19
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