An unsteady lifting-surface theory is developed for the calculation of the airload on a semi-infinite-span thin wing in a compressible flow due to interaction with an oblique gust. By using the solutions obtained for a two-dimensional wing, the problem is formulated so that the unknown is taken to be the difference between the airload on the semi-infinite wing and that on a two-dimensional wing under the same gust conditions. Since this airload difference is nonzero only near the wing tip, the control points need be distributed in the tip region only; this significantly simplifies the numerical procedure. Results are presented for a wing with rectangular tip. The implication for noise and unsteady loads due to blade-vortex interaction for helicopter rotors is discussed.


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    Title :

    Lifting-surface theory for a semi-infinite wing in oblique gust


    Contributors:
    Chu, S. (author) / Widnall, S. E. (author)

    Published in:

    Publication date :

    1974-12-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Lifting-Surface Theory for a Semi-Infinite Wing in Oblique Gust

    SING CHU AND SHEILA E. WIDNALL | AIAA | 1974




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