A flight test campaign with a Dauphin helicopter has been conducted by ONERA, in cooperation with Istres Flight Test Center (CEV). The objective was to investigate the possibility of localizing the noise sources radiated by the helicopter from measurements performed with an array of ground fixed microphones. This study is based on a method that works in frequency domain to successfully localize the airframe noise sources on an aircraft in flight. The acoustic sources identified in this framework are localized on the main rotor disk or on the fenestron depending on the frequency band and on the flight conditions. The results demonstrate the effectiveness of the method. Particularly the method has been applied to localize the blade vortex interaction noise sources that are dominant during descending flight. The results obtained for this flight condition are compared with the locations found by another method in the time domain from data collected with on-board microphones. Both methods give consistent source distributions on the main rotor disk.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Noise source localization on a Dauphin helicopter in flight


    Additional title:

    Lokalisierung von Schallquellen an einem fliegenden Dauphin-Hubschrauber


    Contributors:

    Published in:

    Publication date :

    2004


    Size :

    11 Seiten, 22 Bilder, 1 Tabelle, 16 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Noise Source Localization on a Dauphin Helicopter in Flight

    Blacodon, Daniel | Online Contents | 2004


    Noise Measurement Flight Test: Data/Analyses Aerospatiale SA 365N Dauphin 2 Helicopter

    J. S. Newman / E. J. Rickely / S. A. Daboin et al. | NTIS | 1984


    Simulation of Dauphin DGV noise in descent flight

    Arnaud, Gilles / Falchero, Danielle / Estival, Yves et al. | AIAA | 1998


    Flight-testing the new Dauphin N4

    Klene, Olivier | Online Contents | 1997