This paper presents a detailed evaluation of design factors affecting noise annoyance by V/STOL aircraft. Community noise annoyance is quantified on the basis of recent analyses of survey data, and the implications on V/STOL design discussed. The effect of fundamental design choices on noise levels is analysed. The principal noise sources, and therefore the optimum noise control measures, are a function of disc loading. It is found that increase in rotor scale gives a substantial benefit in subjective levels at the lower disc loadings. Rotor noise source mechanisms are discussed in detail and the dominant effect of the unsteady aerodynamic input to the rotor demonstrated. Data on the effects of recirculation on noise is presented. Two approaches for low noise V/STOL seem to be feasible. These are the low disc loading open rotor, and a ducted fan with substantial duct attenuation treatment. The principal noise control methods for each approach are given.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Noise radiation from V/STOL aircraft.


    Beteiligte:
    Lowson, M. V. (Autor:in)

    Kongress:

    International Council of the Aeronautical Sciences, Congress


    Erscheinungsdatum :

    01.08.1972


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    STOL Aircraft

    NTRS | 1988


    STOL AIRCRAFT

    MOMBRINIE BRUNO | Europäisches Patentamt | 2020

    Freier Zugriff

    STOL aircraft

    MOMBRINIE BRUNO | Europäisches Patentamt | 2022

    Freier Zugriff

    STOL AIRCRAFT

    MOMBRINIE BRUNO | Europäisches Patentamt | 2021

    Freier Zugriff

    STOL AIRCRAFT

    MOMBRINIE BRUNO | Europäisches Patentamt | 2025

    Freier Zugriff