Schramm, Matthias and Stoevesandt, Bernhard and Peinke, Joachim (2018) Optimization of airfoils using the adjoint approach and the influence of adjoint turbulent viscosity. Computation, 6 (1). p. 5. ISSN 2079-3197

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The adjoint approach in gradient-based optimization combined with computational fluid dynamics is commonly applied in various engineering fields. In this work, the gradients are used for the design of a two-dimensional airfoil shape, where the aim is a change in lift and drag coefficient, respectively, to a given target value. The optimizations use the unconstrained quasi-Newton method with an approximation of the Hessian. The flow field is computed with a finite-volume solver where the continuous adjoint approach is implemented. A common assumption in this approach is the use of the same turbulent viscosity in the adjoint diffusion term as for the primal flow field. The effect of this so-called “frozen turbulence” assumption is compared to the results using adjoints to the Spalart–Allmaras turbulence model. The comparison is done at a Reynolds number of Re=2×106 for two different airfoils at different angles of attack.

Item Type: Article
Additional Information: Publiziert mit Hilfe des DFG-geförderten Open Access-Publikationsfonds der Carl von Ossietzky Universität Oldenburg.
Uncontrolled Keywords: airfoil optimization, gradient-based, adjoint approach, frozen turbulence, adjoint turbulence, OpenFOAM
Subjects: Science and mathematics > Physics
Divisions: Scientific Centers > ForWind Center for Wind Energy Research
Date Deposited: 01 Aug 2018 11:23
Last Modified: 24 Aug 2018 11:21
URN: urn:nbn:de:gbv:715-oops-37433
DOI: 10.3390/computation6010005

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