Time domain modelling and stability analysis of complex thermoacoustic systems

dc.contributor.authorBothien, Mirko R.
dc.contributor.authorMoeck, Jonas P.
dc.contributor.authorLacarelle, Arnaud
dc.contributor.authorPaschereit, Christian Oliver
dc.date.accessioned2019-01-08T17:31:19Z
dc.date.available2019-01-08T17:31:19Z
dc.date.issued2007
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractA methodology allowing for a modular setup of complex acoustic systems is developed. The transfer behaviour of the individual subsystems is formulated in time domain. Subsystem descriptions can be obtained by analytical considerations, numerical methods, or experimental data. Once the complex subsystems have been characterized experimentally, changes in system geometry can be implemented easily by exchanging or adding subsystems. To validate the modelling approach, experiments are conducted in an acoustic test rig with a combustor-type geometry. Results are compared to predictions from the model, demonstrating accuracy in frequency and time domain. Application to thermoacoustic instabilities arising in lean-premixed combustion is given. The influence of a modified fuel distribution on an unstable operating point of a lean-premixed combustor is studied and validated with experimental data. Additionally, a study on the parameters governing the flame transfer function is performed to generate a stability map of a model combustor. An advantage of the state-space approach is that stability of a thermoacoustic system can be determined by simply solving a matrix eigenvalue problem. This is in strong contrast to the traditional approach, where the complete model is formulated in frequency domain with infinite-dimensional transfer functions. The time domain approach is based on the methodology presented by Schuermans et al. [1]. In contrast to their work, however, subsystems are not obtained from modal expansions but are characterized by using system identification techniques. Additionally, accuracy of the time domain model is verified by experiments.en
dc.identifier.eissn2041-2967
dc.identifier.issn0957-6509
dc.identifier.urihttps://depositonce.tu-berlin.de//handle/11303/8835
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-7964
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherstability analysisen
dc.subject.otherstate-space systemen
dc.subject.otherthermoacousticsen
dc.subject.othertime domain simulationen
dc.titleTime domain modelling and stability analysis of complex thermoacoustic systemsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1243/09576509JPE384
dcterms.bibliographicCitation.issue5
dcterms.bibliographicCitation.journaltitleProceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energyen
dcterms.bibliographicCitation.originalpublishernameSAGE Publicationsen
dcterms.bibliographicCitation.originalpublisherplaceWashington, DCen
dcterms.bibliographicCitation.pageend668
dcterms.bibliographicCitation.pagestart657
dcterms.bibliographicCitation.volume221
tub.accessrights.dnbdomain
tub.affiliationFak. 5 Verkehrs- und Maschinensysteme>Inst. Strömungsmechanik und Technische Akustik (ISTA)de
tub.affiliation.facultyFak. 5 Verkehrs- und Maschinensystemede
tub.affiliation.instituteInst. Strömungsmechanik und Technische Akustik (ISTA)de
tub.publisher.universityorinstitutionTechnische Universität Berlinde
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