A multifidelity multiobjective optimization framework for high-lift airfoils

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dc.contributor.authorDemange, Jean
dc.contributor.authorSavill, Mark A.
dc.contributor.authorKipouros, Timoleon
dc.date.accessioned2016-09-05T12:41:18Z
dc.date.available2016-09-05T12:41:18Z
dc.date.issued2016-06-17
dc.description.abstractHigh-lift devices design is a challenging task as it involves highly complex flow features while being critical for the overall performance of the aircraft. When part of an optimization loop, the computational cost of the Computational Fluid Dynamics becomes increasingly problematic. Methods to reduce the optimization time has been of major interest over the last 50 years. This paper presents a multiobjective multifidelity optimization framework that takes advantage of two approximation levels of the flow equations: a rapid method that provides quick estimates but of relatively low accuracy and a reference method that provides accurate estimations at the cost of a longer run-time. The method uses a sub-optimization, under a trust-region scheme, performed on the low-fidelity model corrected by a surrogate model that is fed by the high-fidelity tool. The size of the trust region is changed according to the accuracy of the corrected model. The multiobjective optimizer is used to set the positions of the ap and slat of a two-dimensional geometry with lift and drag as objectives with an empirical-based method and a Reynolds Averaged Navier-Stokes equations solver. The multifidelity method shows potential for discovering the complete Pareto front, yet it remains less optimal than the Pareto front from the high-fidelity-only optimization.en_UK
dc.identifier.citationDemange, J., Savill, M. A., Kiporous, T. (2016) A multifidelity multiobjective optimization framework for high-lift airfoils, 17th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, AIAA AVIATION Forum, 13-17 June, Washington, D.C. (AIAA 2016-3367)en_UK
dc.identifier.isbn9781624104398
dc.identifier.urihttp://dx.doi.org/10.2514/6.2016-3367
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/10491
dc.language.isoenen_UK
dc.publisherAIAAen_UK
dc.rightsAttribution-NonCommercial 4.0 Internationalen_UK
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.titleA multifidelity multiobjective optimization framework for high-lift airfoilsen_UK
dc.typeConference paperen_UK

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