Hybrid feedback design for subsonic and transonic airfoils and wings

• A hybrid inverse/optimization method for subsonic/transonic airfoil and wing shapedesign is presented with application to a range of airfoil and wing cases, in preparation forthe test cases defined for the Special Session of SciTech 2014. The method is hybrid in thesense that it combines the traditional inverse design technique with an optimization pro-cedure that determines the optimum target pressure distribution. This paper emphasizesthe first part, the development of SCID, the Surface Curvature Inverse Design method,the theory upon which it is based, including many of the details involved with shocks,smoothing and cross flow. The application of SCID to wing design poses many challenges,and how they are met is discussed in the context of a number of inverse design test casesfor airfoils and wings. The procedure works well for airfoils, whereas twist optimizationfor transonic wings remains a challenge. The real benchmarks for our hybrid approach arethe three Optimization Discussion Group design problems. Solutions are presented for thedrag minimization of the NACA airfoil along with the wing twist optimization problem,and conclusions are drawn from the results obtained. Work has started on the drag mini-mization of the CRM wing in transonic flight, and final results will be presented in a futurepaper.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)

Nyckelord

inverse design

transonic wing

Flyg- och rymdteknik

Aerospace Engineering

Publikations- och innehållstyp

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