An investigation of a cambered, double-element, high-lift wing operating in ground effect was performed. The effect of ground proximity and flap setting was quantified in terms of aerodynamic performance and off-surface flowfield characteristics. From that, it was found that the flow is three-dimensional toward the wing tip with the main element generating most of the downforce but retains quasi-two-dimensional features near the center of the wing. However, at large heights the downforce increases asymptotically with a reduction in height. Then there is either a plateau, in the case of a low flap angle, or a reduction in downforce, in the case of a large flap angle. The downforce then increases again until it reaches a maximum and then reduces with decreasing height above the ground. The maximum downforce is dictated by gains in downforce from lower surface suction increases and losses in downforce caused by upper surface pressure and lower surface suction losses, with a reduction in height. For the high flap angle there is a sharp reduction just beyond the maximum, mainly because of the boundary layer separating, and a resultant loss of circulation on the main element.


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    Title :

    Aerodynamics of a double-element wing in ground effect


    Additional title:

    Bodeneffekt bei der Umströmung eines aus zwei Elementen bestehenden Spaltflügels


    Contributors:
    Zhang, X. (author) / Zerihan, J. (author)

    Published in:

    AIAA Journal ; 41 , 6 ; 1007-1016


    Publication date :

    2003


    Size :

    10 Seiten, 13 Bilder, 1 Tabelle, 14 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Aerodynamics of a Double-Element Wing in Ground Effect

    Xin Zhang / Jonathan Zerihan | AIAA | 2003


    Aerodynamics of a double element wing in ground effect

    Zhang, X. / Zerihan, J. | AIAA | 2002


    Aerodynamics of a single element wing in ground effect

    Zerihan, Jonathan / Zhang, Xin | AIAA | 2000


    Aerodynamics of a Single Element Wing in Ground Effect

    Jonathan Zerihan / Xin Zhang | AIAA | 2000


    Aerodynamics of a Single Element Wing in Ground Effect

    Zerihan, J. / Zhang, X. / AIAA | British Library Conference Proceedings | 2000