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dc.contributor.authorOrchini, Alessandro
dc.contributor.authorPedergnana, Tiemo
dc.contributor.authorBuschmann, Philip Erik
dc.contributor.authorMoeck, Jonas
dc.contributor.authorNoiray, Nicolas
dc.date.accessioned2023-02-27T12:04:52Z
dc.date.available2023-02-27T12:04:52Z
dc.date.created2022-02-15T18:21:45Z
dc.date.issued2022
dc.identifier.citationJournal of Sound and Vibration. 2022, 526 .en_US
dc.identifier.issn0022-460X
dc.identifier.urihttps://hdl.handle.net/11250/3054209
dc.description.abstractThermoacoustic instabilities in stationary gas turbines may cause high-amplitude limit cycles, leading to damaged components and costly down-time. To better understand the physical origin of such instabilities in a can-annular combustor configuration, we study the properties of the spectrum of a reduced-order can-annular thermoacoustic system. Increased focus is placed on representing the aeroacoustic interaction between the longitudinal eigenmodes of the individual cans with physically relevant models. To represent the acoustic pressure dynamics in the combustor, we combine an analytical, experimentally validated model for the can-to-can impedance with a frequency-dependent model of the flame response in the cans to acoustic perturbations. By using this approach, we perform a parametric study of the linear stability of an atmospheric can-annular thermoacoustic system, and emphasize general features of the structure and properties of the eigenvalues and the eigenvectors of can-annular combustors. Lastly, we emphasize the differences in the can-to-can coupling that arise when considering open-end boundary conditions – representative of atmospheric set-ups – or closed-end boundary conditions – representative of real gas turbine combustors.en_US
dc.language.isoengen_US
dc.publisherElsevier B. V.en_US
dc.relation.urihttps://doi.org/10.1016/j.jsv.2022.116808
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleReduced-order modelling of thermoacoustic instabilities in can-annular combustorsen_US
dc.title.alternativeReduced-order modelling of thermoacoustic instabilities in can-annular combustorsen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber14en_US
dc.source.volume526en_US
dc.source.journalJournal of Sound and Vibrationen_US
dc.identifier.doi10.1016/j.jsv.2022.116808
dc.identifier.cristin2002020
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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