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dc.contributor.authorMathews, JRen
dc.contributor.authorPeake, Nigelen
dc.date.accessioned2017-04-28T14:15:39Z
dc.date.available2017-04-28T14:15:39Z
dc.date.issued2017-05-12en
dc.identifier.issn0022-460X
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/263887
dc.description.abstractThis paper considers the acoustic field inside an annular duct carrying mean axial and swirling flow and with either acoustically hard or lined walls. The particular aim is to compute the Green's function, which is required for predicting the noise generated by known acoustic sources, both approximately and numerically. Asymptotic approximations for first the eigenmodes and then the Green's function are derived in the realistic limit of high reduced frequency, which are found to agree very favourably with results determined numerically, even for relatively modest frequencies. Using a blend of uniform WKB asymptotics and numerics, singular cases in which multiple turning points are present are treated, allowing computation of accurate results across a very wide range of parameter values and flows.
dc.description.sponsorshipThis work was supported by the UK Engineering and Physical Sciences Research Council (EPSRC) Grant EP/H023348/1 for the University of Cambridge Centre for Doctoral Training, the Cambridge Centre for Analysis.
dc.language.isoenen
dc.publisherElsevier
dc.subjectaeroacousticsen
dc.subjectturbomachineryen
dc.subjectswirlen
dc.subjectGreen's functionen
dc.subjecthigh-frequency asymptoticsen
dc.titleThe acoustic Green's function for swirling flow in a lined ducten
dc.typeArticle
prism.endingPage316
prism.publicationDate2017en
prism.publicationNameJournal of Sound and Vibrationen
prism.startingPage294
prism.volume395en
dc.identifier.doi10.17863/CAM.9265
dcterms.dateAccepted2017-02-07en
rioxxterms.versionofrecord10.1016/j.jsv.2017.02.015en
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
rioxxterms.licenseref.startdate2017-05-12en
dc.contributor.orcidPeake, Nigel [0000-0001-8346-3219]
dc.identifier.eissn1095-8568
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/H023348/1)
cam.issuedOnline2017-02-15en
rioxxterms.freetoread.startdate2018-02-15


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