Acoustic data are analyzed from a series of ground tests performed on an Aero Commander propeller-driven aircraft with an array of microphones flush-mounted on one side of the fuselage. The analyses were concerned with the propeller blade passage noise during static operation at several different engine speeds and included calculations of the magnitude and phase of the blade passage tones, the amplitude stability of the tones, and the spatial phase and coherence of the tones. The results indicate that the pressure field impinging on the fuselage represents primarily aerodynamic (near field) effects in the plane of the propeller at all frequencies. Forward and aft of the propeller plane aerodynamic effects still dominate the pressure field at frequencies below 200 Hz; but at higher frequencies, the pressure field is due to acoustic propagation from an equivalent center located about 0.15 to 0.30 blade diameters inboard from the propeller hub.


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    Title :

    Evaluation of Aero Commander Propeller Acoustic Data: Static Operations


    Contributors:
    A. G. Piersol (author) / E. G. Wilby (author) / J. F. Wilby (author)

    Publication date :

    1978


    Size :

    110 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Evaluation of aero Commander propeller acoustic data: Static operations

    Piersol, A. G. / Wilby, E. G. / Wilby, J. F. | NTRS | 1978


    Evaluation of aero commander propeller acoustic data: Taxi operations

    Piersol, A. G. / Wilby, E. G. / Wilby, J. F. | NTRS | 1979


    Evaluation of AERO Commander Propeller Acoustic Data: Taxi Operations

    A. G. Piersol / E. G. Wilby / J. F. Wilby | NTIS | 1979



    RACER AERO-ACOUSTIC PROPELLER ANALYSIS AND DESIGN

    Decours, J. / Bailly, J. / Ortun, B. et al. | British Library Conference Proceedings | 2019