Aerodynamic research relating to modern helicopters includes the study of three-dimensional, unsteady, nonlinear flow fields. A selective review is made of some of the phenomenon that hamper the development of satisfactory engineering prediction techniques, but which provides a rich source of research opportunities: flow separations, compressibility effects, complex vortical wakes, and aerodynamic interference between components. Several examples of work in progress are given, including dynamic stall alleviation, the development of computational methods for transonic flow, rotor-wake predictions, and blade-vortex interactions. (Author)


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    Title :

    Special Opportunities in Helicopter Aerodynamics


    Contributors:

    Publication date :

    1983


    Size :

    34 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English







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