Several examples of three-dimensional boundary layers on helicopter rotors are analyzed within framework of small-crossflow and quasi-steady approximations; assumptions are shown to be mutually consistent and to have wide range of applicability; in laminar flow, crossflow can be separated into components due to rotation and instantaneous yawing of rotor blade relative to direction of flight; third-order perturbation expansions for flat-plate blade show relative importance of rotational and translational motion, and analysis of flow over several blade sections with thickness demonstrates role of chordwise pressure gradients; results indicate that crossflow tends to delay separation on retreating side of rotor disk. (06652)


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    Title :

    Laminar boundary layers on helicopter rotors in forward flight


    Additional title:

    AIAA J


    Contributors:

    Published in:

    AIAA Journal ; 6 , n 10


    Publication date :

    1968


    Size :

    8 pages


    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English


    Keywords :


    Laminar boundary layers on helicopter rotors in forward flight.

    MCCROSKEY, W. J. / YAGGY, P. F. | AIAA | 1968




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