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Suppression of thermoacoustic instabilities by flame-structure interaction

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Mecánica de Fluidoses
dc.contributor.authorRubio Rubio, Mariano
dc.contributor.authorVeiga López, Fernando
dc.contributor.authorMartínez Ruiz, Daniel
dc.contributor.authorFernández Tarrazo, Eduardo Antonio
dc.contributor.authorSánchez Sanz, Mario
dc.contributor.funderComunidad de Madrides
dc.contributor.funderAgencia Estatal de Investigación (España)es
dc.date.accessioned2023-09-29T08:24:34Z
dc.date.available2023-09-29T08:24:34Z
dc.date.issued2023
dc.description.abstractWe present here an experimental study of the influence of the aeroelastic coupling between the combustion chamber walls and the acoustic fluid field on the onset and development of thermoacoustic instabilitiesin stoichiometric propane-air premixed flames. A horizontal quasi-two-dimensional Hele-Shaw chamber formed by two parallel plates separated a small distance h is used. The flames are ignited at the open end, in contact with the atmosphere, and propagate towards the opposite closed end. The experiments reveal three distinct propagation regimes determined by the stiffness of the plates and the evolution of the pressure perturbation generated during ignition: (i) for sufficiently rigid plates, we observed secondary acoustic instabilities with large amplitude oscillations in the direction of propagation of the flame; for flexible enough walls to be compliant with ignition-related pressure changes, (ii) the propagation of the flame undergoes small-amplitude oscillations (primary acoustic instabilities) along the channel or (iii) it is smooth with no oscillations whatsoever. The flexural rigidity of the plate is modified experimentally by changing both the widthW and thickness hw of the top plate of the Hele-Shaw cell. The data recorded by the pressure transducer and the accelerometer is used to plot a stability map in the W - hw parametric space to define the combination of structural parameters that triggers the onset of thermoacoustic instabilities. Our experimental measurements, supplemented with results from a theoretical analysis of the walls vibration modes, indicated that deformation-induced volume changes of around 0.1% of the volume of the Hele-Shaw cell are sufficient to suppress thermoacoustic instabilities.en
dc.description.sponsorshipThis work was funded by the Agencia Estatal de Investigación of Spain under grants PID2019-108592RA-C43 and PID2019-108592RB-C41, and by the Regional Government of Madrid (Comunidad de Madrid-Spain) under the Multiannual Agreement with UC3M (H2SFE-CM-UC3M). The authors wish to thank the technical knowledge and assistance of David Díaz, Israel Pina and Manuel Santos in the design, construction and operation of the experimental setup. The assistance of Rubén Palomeque in the preparation of figure 6 is greatly acknowledged. We would also like to acknowledge Raúl San Miguel and Ramón Zaera for providing the values of E and v of the PMMA plates. Funding for APC: Universidad Carlos III de Madrid Read & Publish Agreement CRUE-CSIC 2022.en
dc.format.extent9
dc.identifier.bibliographicCitationRubio-Rubio, M., Veiga-López, F., Martínez-Ruiz, D., Fernández-Tarrazo, E., & Sánchez–Sanz, M. (2023). Suppression of thermoacoustic instabilities by flame-structure interaction. Proceedings of the Combustion Institute, 39(2), 1577-1585.en
dc.identifier.doihttps://doi.org/10.1016/j.proci.2022.07.165
dc.identifier.issn1540-7489
dc.identifier.publicationfirstpage1577
dc.identifier.publicationissue2
dc.identifier.publicationlastpage1585
dc.identifier.publicationtitleProceedings of the Combustion Instituteen
dc.identifier.publicationvolume39
dc.identifier.urihttps://hdl.handle.net/10016/38479
dc.identifier.uxxiAR/0000033397
dc.language.isoengen
dc.publisherElsevieren
dc.relation.projectIDGobierno de España. PID2019-108592RB-C41es
dc.relation.projectIDGobierno de España. PID2019-108592RA-C43es
dc.relation.projectIDComunidad de Madrid. H2SFE-CM-UC3Mes
dc.relation.projectIDAT-2022
dc.rights© 2022 The Authors.en
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaEducaciónes
dc.subject.ecienciaEnergías Renovableses
dc.subject.ecienciaFísicaes
dc.subject.ecienciaIngeniería Industriales
dc.subject.ecienciaIngeniería Mecánicaes
dc.subject.ecienciaQuímicaes
dc.subject.otherThermoacoustic instabilitiesen
dc.subject.otherFlame-structure interactionen
dc.subject.otherHele-shaw cellen
dc.subject.otherPremixed flamesen
dc.titleSuppression of thermoacoustic instabilities by flame-structure interactionen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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