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TY - THES AU - Abu-Zurayk, Mohammad TI - An aeroelastic coupled adjoint approach for multi-point designs in viscous flows; Als Manuskript gedruckt VL - 2017-10 IS - DLR-FB-2017-10 PB - RWTH Aachen University VL - Dissertation CY - Köln M1 - RWTH-2017-03453 M1 - DLR-FB-2017-10 T2 - Forschungsbericht / DLR, Deutsches Zentrum für Luft- und Raumfahrt SP - xii, 86 Seiten : Diagramme, Illustrationen PY - 2016 N1 - Auch veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2017 N1 - Dissertation, RWTH Aachen University, 2016 AB - As the wing flies, its structural elasticity interacts with the aerodynamic loads and the wing deforms. This deformation influences the aerodynamic flow over the wing. Hence, besides employing high-fidelity flow equations, considering the structural elasticity is necessary for an accurate prediction of the wing aerodynamic coefficients. Wing shape optimizations that consider high-fidelity aeroelastic effects are computationally costly and therefore the gradient-based algorithms are suitable for them. This study presents an efficient approach for computing the gradients required for such optimizations. An existing viscous flow adjoint approach is extended to include the structural elasticity effects. The contribution of this work is, to differentiate the flow-structure coupling methods and to implement the coupled adjoint equations in order to use it within industrially relevant wing-shape optimizations. The advantages of this coupled aeroelastic adjoint approach are that it computes the gradients accurately and nearly independently of the number of design parameters engaged in the optimization, hence it is possible to use high number of design parameters. This allows high-fidelity multipoint optimizations within acceptable computational time. In this context, it is found that the adjoint approach is saving more than 80 LB - PUB:(DE-HGF)3 ; PUB:(DE-HGF)29 ; PUB:(DE-HGF)11 DO - DOI:10.18154/RWTH-2017-03453 UR - https://publications.rwth-aachen.de/record/687847 ER -