Investigation of utilizing a single surface depression in the optimisation of NLF aerofoil design

R. McRoberts, J. M. Early, S. Spence, H. Medina

Research output: Chapter in Book/Report/Conference proceedingConference proceeding

2 Citations (Scopus)

Abstract

An environment has been created for the optimisation of aerofoil profiles with inclusion of small surface features. For TS wave dominated flows, the paper examines the consequences of the addition of a depression on the aerodynamic optimisation of an NLF aerofoil, and describes the geometry definition fidelity and optimisation algorithm employed in the development process. The variables that define the depression for this optimisation investigation have been fixed, however a preliminary study is presented demonstrating the sensitivity of the flow to the depression characteristics. Solutions to the optimisation problem are then presented using both gradient-based and genetic algorithm techniques, and for accurate representation of the inclusion of small surface perturbations it is concluded that a global optimisation method is required for this type of aerofoil optimisation task due to the nature of the response surface generated. When dealing with surface features, changes in the transition onset are likely to be of a non-linear nature so it is highly critical to have an optimisation algorithm that is robust, suggesting that for this framework, gradient-based methods alone are not suited.

Original languageEnglish
Title of host publication28th AIAA Applied Aerodynamics Conference
PublisherAmerican Institute of Aeronautics and Astronautics
Pages1608-1620
Number of pages13
ISBN (Print)9781617389269
DOIs
Publication statusPublished - 2010
Event28th AIAA Applied Aerodynamics Conference - Chicago, United States
Duration: 28 Jun 20101 Jul 2010

Conference

Conference28th AIAA Applied Aerodynamics Conference
CountryUnited States
CityChicago
Period28/06/101/07/10

ASJC Scopus subject areas

  • Aerospace Engineering

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    McRoberts, R., Early, J. M., Spence, S., & Medina, H. (2010). Investigation of utilizing a single surface depression in the optimisation of NLF aerofoil design. In 28th AIAA Applied Aerodynamics Conference (pp. 1608-1620). [2010-4679] American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2010-4679