Enhancing the characterisation of ducted noise sources using a spectral formulation

Teresa Bravo 1 Cédric Maury 2
2 Sons
LMA - Laboratoire de Mécanique et d'Acoustique [Marseille] : UPR7051
Abstract : The characterization of ducted sound sources is very useful to the aeronautical and automotive industries. It provides inputs to models used for predicting flow-generated noise at the design stage. Conventional inverse approaches, such as the Equivalent Source Method, offer accurate reconstruction results. But they require either a large number of in-duct field pressure measurements or a suitable location of a few number of equivalent sources. This research proposes an alternative approach formulated in the spectral domain: the Spectral Decomposition Method. It directly provides a cross-sectional imaging of the source velocity distribution from pressure data measured at small or large stand-off distance to the source. Well-resolved imaging results of the axial acoustic velocity generated by wall-mounted drivers have been obtained from either in-duct or wall-pressure measurements acquired respectively without or with flow.
Type de document :
Article dans une revue
Noise & Vibration Worldwide, 2011, 42 (3), pp.9 - 16. 〈10.1260/0957-4565.42.3.9〉
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https://hal.archives-ouvertes.fr/hal-00589231
Contributeur : Cédric Maury <>
Soumis le : jeudi 28 avril 2011 - 10:30:50
Dernière modification le : jeudi 28 avril 2016 - 10:45:35

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Teresa Bravo, Cédric Maury. Enhancing the characterisation of ducted noise sources using a spectral formulation. Noise & Vibration Worldwide, 2011, 42 (3), pp.9 - 16. 〈10.1260/0957-4565.42.3.9〉. 〈hal-00589231〉

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