A formulation for the induced drag of a wing in subsonic or transonic flow is derived from entropy considerations. This approach shows how wave drag and induced drag are related. The new formulation is cast in a form similar to that used in the classic induced drag derivation thus allowing a theoretical comparison of the two approaches. If there are no shock waves in the flow the two formulations agree theoretically only in the case of an elliptic wing loading, although calculations indicate that the quantitative difference may be relatively small. If shock waves are present they can increase or decrease the induced drag leading to the idea of a reduction in the sum of induced and wave drag by a judicious tailoring of the flow over the wing.


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    Title :

    A Relationship Between Wave Drag and Induced Drag


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    World Aviation Congress & Exposition ; 2003



    Publication date :

    2003-09-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    A Relationship Between Wave Drag and Induced Drag

    Nixon, D. / Society of Automotive Engineers | British Library Conference Proceedings | 2003


    Viscous induced drag

    GREENE, GEORGE | AIAA | 1988


    Subsonic induced drag

    SANDERS, K. L. | AIAA | 1965


    Transient induced drag

    WEIHS, D. / KATZ, J. | AIAA | 1986


    Wing Induced Drag

    Schmidt, Louis / Duren, R. | AIAA | 2002