Dynamic stall of rotors in forward flight is studied in terms of the limiting on helicopter performance. Manifestations of the phenomena depend on the characteristics of the rotors and on operating conditions. The lift of the rotor, forward velocity, engine speed, and the interaction of vortices with the blade surface all contribute to the development of stall. Experiments demonstrating the unsteady nature of the phenomena are reported. Simulation of dynamic stall phenomena on an oscillating model shows that the delay in unsteady stalling is associated with the development of a system of vortices along the leading edge. A two dimensional analysis is used in modeling dynamic stall.


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    Title :

    Rotors in Forward Flight and Dynamic Stall Pale Reculante et Decrochage Dynamique


    Contributors:
    J. Renaud (author)

    Publication date :

    1979


    Size :

    26 pages



    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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