Restricted Snakes: a Flexible Topology Parameterisation Method for Aerodynamic Optimisation

Alexandre D J Payot, Thomas Rendall, Christian Allen

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

8 Citations (Scopus)

Abstract

This paper presents the development of a novel parameterisation method for aerodynamics which allows topological flexibility. This new parameterisation method builds geometries using restricted snakes to recover Volume Of Solid (VOS) data under a minimum length constraint. Geometric inverse design results are presented showing the ability of the parameterisation to recover a range of aerodynamic shapes to a set tolerance. The Aerodynamic Design Optimization Discussion Group (ADODG) Eulerian drag minimisation of the NACA 0012 (case 1) was attempted using a conjugate gradient optimiser leading to a drag coefficient of 66 counts. Results of supersonic drag minimizations under an area constraint were compared against known linear optima, showing equivalent or better aerodynamic performance in all cases. The topological flexibility of the parametrisation allowed reductions in drag of 80% compared to the Busemann biplane, a multiplane profile predicted to have no wave drag at supersonic speed by linear theory
Original languageEnglish
Title of host publication55th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc. (AIAA)
Number of pages25
ISBN (Electronic)9781624104473
DOIs
Publication statusPublished - Jan 2017

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