To study the acoustic field of propelled light aircraft, a method of in-flight measurements was implemented. The separation of noise sources is achieved by examination of the influence on the acoustic field on the relative set-up of the propeller and the engine. This shows that at high rotational speed, the propeller is the dominant source. Evaluating then the field due to steady/unsteady loading on the blades, one concludes that the former ones are the most acoustically efficients. The analysis fly-over noise measurements, using an original signal processing (doppler effect compensation) makes the results obtained more complete. (Krautzig)


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    Titel :

    Propeller light aircraft noise at discrete frequencies


    Weitere Titelangaben:

    Propellergeraeusch von Leichtflugzeugen bei diskreten Frequenzen


    Beteiligte:
    Dahan, C. (Autor:in) / Avezard, L. (Autor:in) / Guillien, G. (Autor:in) / Malarmey, L. (Autor:in) / Chombard, J. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1980


    Format / Umfang :

    10 Seiten, 21 Bilder, 8 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Propeller Light Aircraft Noise at Discrete Frequencies

    Claude Dahan / Leon Avezard / Georges Guillien et al. | AIAA | 1981


    Propeller light aircraft noise at discrete frequencies

    DAHAN, C. / AVEZARD, L. / GUILLIEN, G. et al. | AIAA | 1980


    Aircraft Propeller Noise

    H. H. Brouwer | NTIS | 1994


    Aircraft propeller noise

    Brouwer, H. H. / von Karman Institute for Fluid Dynamics | British Library Conference Proceedings | 1994


    Noise Evaluation of Light Propeller-Driven Aircraft

    Brueel, P. V. / Deutsche Gesellschaft fur Luft- und Raumfahrt e.V. / AIAA | British Library Conference Proceedings | 1992