A method for estimation of aeroelastic responses of an Active Aeroelastic Wing (AAW) concept, via CFD analysis, is developed and used in a drag minimization study. The first part of the study presents a method for flow analysis of an elastic wing with multiple deflected flaps. The Infinite Plate Spline (IPS) method is used to generate surface grids for the wing with deflected flaps, as well as for mapping the elastic modes from the structural nodes to the CFD surface grid. Flow analyses at various flap settings provide the aerodynamic coefficients, aerodynamic load distributions, and section loads, and are used to evaluate the sensitivities of these attributes to flap deflections. These sensitivities serve in an optimization process, with the objective of drag minimization, constrained by the lift coefficient. The method is applied for the AGARD 445.6 wing with four added flaps. Trim optimization provides a flap setting that yields an elliptical spanwise load distribution and a reduced drag compared to that of the baseline configuration. The analysis and optimization methods of this study can be used to evaluate aeroelastic responses of elastic wings with flaps, to design reliable AAW control laws, and to asses the errors resulting from the use of lower-order linear aerodynamic tools in analysis and design.


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    Title :

    CFD-based aeroelastic response of an active aeroelastic wing


    Contributors:


    Publication date :

    2004


    Size :

    10 Seiten, 12 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English