Print Email Facebook Twitter Coupled adjoint aerostructural wing optimization using quasi-three-dimensional aerodynamic analysis Title Coupled adjoint aerostructural wing optimization using quasi-three-dimensional aerodynamic analysis Author Elham, A. (TU Delft Flight Performance and Propulsion) van Tooren, M.J.L. (TU Delft System Engineering & Aircraft Design) Date 2016 Abstract This paper presents a method for wing aerostructural analysis and optimization, which needs much lower computational costs, while computes the wing drag and structural deformation with a level of accuracy comparable to the higher fidelity CFD and FEM tools. A quasi-threedimensional aerodynamic solver is developed and connected to a finite beam element model for wing aerostructural optimization. In a quasi-three-dimensional approach an inviscid incompressible vortex lattice method is coupled with a viscous compressible airfoil analysis code for drag prediction of a three dimensional wing. The accuracy of the proposed method for wing drag prediction is validated by comparing its results with the results of a higher fidelity CFD analysis. The wing structural deformation as well as the stress distribution in the wingbox structure is computed using a finite beam element model. The Newton method is used to solve the coupled system. The sensitivities of the outputs, for example the wing drag, with respect to the inputs, for example the wing geometry, is computed by a Ali Elham a.elham@tudelft.nl Michel J. L. van Tooren vantooren@cec.sc.edu 1 Faculty of Aerospace Engineering, Delft University of Technology, Delft, Netherlands 2 McNair Center for Aerospace Research and Innovation, University of South Carolina, Columbia, South Carolina, USA combined use of the coupled adjoint method, automatic differentiation and the chain rule of differentiation. A gradient based optimization is performed using the proposed tool for minimizing the fuel weight of an A320 class aircraft. The optimization resulted in more than 10 % reduction in the aircraft fuel weight by optimizing the wing planform Subject Wing aerostructural optimizationQuasi-three-dimensional aerodynamic analysisCoupled adjoint sensitivity analysis To reference this document use: http://resolver.tudelft.nl/uuid:993e6fc1-2a43-4ba4-bafe-933dc239e428 DOI https://doi.org/10.1007/s00158-016-1447-9 ISSN 1615-147X Source Structural and Multidisciplinary Optimization, 54, 889–906 Event 16th AIAA/ISSMO multidisciplinary analysis and optimization conference, Dallas, USA, 2015-06-22 → 2015-06-26, Reston Bibliographical note harvest AIAA 2015-2487 Part of collection Institutional Repository Document type journal article Rights © 2016 A. Elham, M.J.L. van Tooren Files PDF Coupled_adjoint_SMDO.pdf 2.02 MB Close viewer /islandora/object/uuid:993e6fc1-2a43-4ba4-bafe-933dc239e428/datastream/OBJ/view