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Computational fluid dynamics analysis of multi-element, high-lift aerofoil sections at transonic manoeuvre conditions

Johnston, LJ 2012, 'Computational fluid dynamics analysis of multi-element, high-lift aerofoil sections at transonic manoeuvre conditions' , Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 226 (8) , pp. 912-929.

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    Abstract

    The application of a previously-developed computational method to the prediction of high-lift performance for multi-element aerofoil sections operating at transonic flow conditions is described. The flows are computed by solving the Reynolds-averaged Navier-Stokes equations, using a full differential Reynolds-stress turbulence model to evaluate the various Reynolds-stress components appearing in the governing mean-flow equations. Algebraic wall functions are used to bridge the molecular-viscosity dominated region immediately adjacent to the aerofoil surfaces. An unstructured-grid based Computational Fluid Dynamics methodology is used to deal with the geometric complexity of the multi-element aerofoil configurations. Initial results are presented for the viscous, transonic flow development around the SKF 1.1 supercritical aerofoil section, equipped with either a trailing-edge flap or a leading-edge slat. Predicted surface pressure distributions generally compare well with experimental data for the two high-lift aerofoil geometries considered, at a free-stream Mach number of 0.6 and over a range of incidence angles. There are some discrepancies in the regions immediately downstream of shock wave/boundary layer interactions, possibly resulting from the use of wall-function boundary conditions in the computations. Predicted Mach number contours indicate the complexity of the transonic flow fields for high-lift configurations, with the slat wake passing through an extensive supersonic-flow region, terminated by a normal shock wave, on the main aerofoil upper surface, for example

    Item Type: Article
    Themes: Subjects outside of the University Themes
    Schools: Colleges and Schools > College of Science & Technology
    Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
    Journal or Publication Title: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
    Publisher: SAGE Publications
    Refereed: Yes
    ISSN: 0954-4100
    Depositing User: LJ Johnston
    Date Deposited: 24 Jul 2012 09:46
    Last Modified: 12 Nov 2014 22:04
    URI: http://usir.salford.ac.uk/id/eprint/23033

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