A new interaction law that accelerates convergence of interactive boundary-layer methods is presented. The law is derived from the Laplace equation and allows the automatic implementation of the Kutta condition for lifting airfoil flows. The accurate influence coefficients of the Laplace interaction law (LIL) facilitate efficient prediction of high-lift flows about multi-element airfoils by direct numerical simulation. Taking into account siutable turbulent closure relations for boundary-layedr equations, a fast and reliable computer code has been developed for industrial applications at Deutsche Aerospace Airbus. Very fast convergence and good agreement of calculated results with experiments are observed over a reasonable range of multi-element aifoil flows up to maximum lift. The LIL coupling technique can also be extended to transonic flows. A quasisimultaneous iteration procedure, similar to well-known thin-airfoil coupling techniques follows, and accelerated convergence is obtained using the more appropriate influence coefficients of LIL.


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    Title :

    Laplace interaction law for the computation of viscous airfoil flow in low- and high-speed aerodynamics


    Additional title:

    Laplace Interaktionsfunktion für die Berechnung viskoser Flügelströmungsaerodynamik bei geringen und hohen Geschwindigkeiten


    Contributors:
    Arnold, F. (author) / Thiele, F. (author)

    Published in:

    AIAA Journal ; 32 , 11 ; 2178-2185


    Publication date :

    1994


    Size :

    8 Seiten, 9 Bilder, 34 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English