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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Journal of Sound and...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Journal of Sound and Vibration
Article . 2022 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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An effective impedance for modelling the aeroacoustic coupling of ducts connected via apertures

Authors: Alessandro Orchini;

An effective impedance for modelling the aeroacoustic coupling of ducts connected via apertures

Abstract

Abstract An effective impedance that models the aeroacoustic coupling between periodic arrays of ducts that communicate via apertures is derived. A lumped description of the interaction between the one-dimensional acoustics in the ducts and the transverse unsteady fluctuations in the connecting apertures is exploited in the derivation of the impedance. This configuration is of relevance for some industrial applications, for example to model the aeroacoustic coupling between cans in gas turbines equipped with can-annular combustors. The derived impedance can be used as a Bloch-type boundary condition to reduce theoretical and computational analysis on the dynamics of these arrays of ducts to a single duct. After the derivation of a general result, simpler limits of interest are discussed. For some of these limits, impedance models are available in the literature. It is shown how the effective impedance derived in this study reduces to already available models in these limits, but more generally embeds new features, including the explicit dependence of the impedance on the grazing flow Mach number and the finite extension of the apertures.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
6
Top 10%
Average
Top 10%