An intuitive shape parameterization and control technique suitable for high-fidelity aerodynamic shape optimization is presented. It relies on the principles of free-form and axial deformation, enabling thorough exploration of the design space while keeping the number of design variables manageable. Surface sensitivities to the design variables are readily available; their inclusion in a highly efficient and robust adjoint-based optimization methodology involving linearly elastic volume mesh deformation and a Newton–Krylov solver for the Euler equations is described. The flexibility of the proposed approach is demonstrated through the exploratory shape optimization of a three-pronged feathered winglet, leading to a span efficiency of 1.19 under a height-to-span ratio constraint of 0.1, and an optimization of a regional jet wing at transonic speed where a winglet is allowed to develop starting from a planar wingtip extension, leading to an 18.8% reduction in drag.


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    Title :

    Two-Level Free-Form and Axial Deformation for Exploratory Aerodynamic Shape Optimization


    Contributors:

    Published in:

    AIAA Journal ; 53 , 7 ; 2015-2026


    Publication date :

    2015-03-10


    Size :

    12 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    TWO-LEVEL FREE-FORM DEFORMATION FOR HIGH-FIDELITY AERODYNAMIC SHAPE OPTIMIZATION

    Gagnon, H. / Zingg, D. / American Institute of Aeronautics and Astronautics; International Society for Structural and Multidisciplinary Optimization | British Library Conference Proceedings | 2012



    High-fidelity Aerodynamic Shape Optimization of Unconventional Aircraft through Axial Deformation (AIAA 2014-0908)

    Gagnon, H. / Zingg, D.W. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2014