A theory is developed and used for determining the influence of compressibility on the aerodynamic forces acting on helicopter rotor blades when oscillating in hovering flight. The usual two-dimensional mathematical model of the flow is adopted in which a section of the reference rotor blade and its helical wake is replaced by an airfoil with a straight wake and a system of regularly spaced infinite wakes below, the amount of spacing depending on the downward flow induced by the rotor and the number of blades. (Author)


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    Title :

    Compressibility Effects on Oscillating Rotor Blades in Hovering Flight


    Contributors:
    W. P. Jones (author) / B. M. Rao (author)

    Publication date :

    1968


    Size :

    42 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English








    Analyzing Wakes From Hovering-Helicopter Rotor Blades

    Bliss, D. B. / Wachspress, D. A. / Quackenbush, T. R. et al. | NTRS | 1987