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dc.contributor.authorGant, Francesco-
dc.contributor.authorCuquel, Alexis-
dc.contributor.authorBothien, Mirko-
dc.date.accessioned2022-06-30T09:32:08Z-
dc.date.available2022-06-30T09:32:08Z-
dc.date.issued2022-
dc.identifier.issn1756-8277de_CH
dc.identifier.issn1756-8285de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/25191-
dc.description.abstractModern gas turbines need to fulfil increasingly stringent emission targets on the one hand and exhibit outstanding operational and fuel flexibility on the other. Ansaldo Energia GT26 and GT36 gas turbine models address these requirements by employing a combustion system in which two lean premixed combustors are arranged in series. Due to the high inlet temperatures from the first stage, the second combustor stage predominantly relies on autoignition for flame stabilization. In this paper, the response of autoignition flames to temperature, pressure and velocity excitations is investigated. The gas turbine combustor geometry is represented by a backward-facing step. Based on the conservation equations an analytical model is derived by solving the linearized Rankine-Hugoniot conditions. This is a commonly used analytical approach to describe the relation of thermodynamic quantities up- and downstream of a propagation stabilized flame. In particular, the linearized Rankine-Hugoniot jump conditions are derived taking into account the presence of a moving discontinuity as well as upstream entropy inhomogeneities. The unsteady heat release rate of the flame is modelled as a linear superposition of flame transfer functions, accounting for velocity, pressure, and entropy disturbances, respectively. This results in a 3 × 3 flame transfer matrix relating both primitive acoustic variables and the temperature fluctuations across the flame. The obtained analytical expression is compared to large eddy simulations with excellent agreement. A discussion about the contribution of the single terms to the modelling effort is provided, with a focus on autoignition flames.de_CH
dc.language.isoende_CH
dc.publisherSagede_CH
dc.relation.ispartofInternational Journal of Spray and Combustion Dynamicsde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectAutoignitionde_CH
dc.subjectGas turbinede_CH
dc.subjectSequential combustionde_CH
dc.subjectFlame transfer matrixde_CH
dc.subject.ddc629: Luftfahrt- und Fahrzeugtechnikde_CH
dc.titleAutoignition flame transfer matrix : analytical model versus large eddy simulationsde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitut für Energiesysteme und Fluid-Engineering (IEFE)de_CH
dc.identifier.doi10.1177/17568277221086261de_CH
zhaw.funding.euNode_CH
zhaw.issue1-2de_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end81de_CH
zhaw.pages.start72de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume14de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
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Gant, F., Cuquel, A., & Bothien, M. (2022). Autoignition flame transfer matrix : analytical model versus large eddy simulations. International Journal of Spray and Combustion Dynamics, 14(1-2), 72–81. https://doi.org/10.1177/17568277221086261
Gant, F., Cuquel, A. and Bothien, M. (2022) ‘Autoignition flame transfer matrix : analytical model versus large eddy simulations’, International Journal of Spray and Combustion Dynamics, 14(1-2), pp. 72–81. Available at: https://doi.org/10.1177/17568277221086261.
F. Gant, A. Cuquel, and M. Bothien, “Autoignition flame transfer matrix : analytical model versus large eddy simulations,” International Journal of Spray and Combustion Dynamics, vol. 14, no. 1-2, pp. 72–81, 2022, doi: 10.1177/17568277221086261.
GANT, Francesco, Alexis CUQUEL und Mirko BOTHIEN, 2022. Autoignition flame transfer matrix : analytical model versus large eddy simulations. International Journal of Spray and Combustion Dynamics. 2022. Bd. 14, Nr. 1-2, S. 72–81. DOI 10.1177/17568277221086261
Gant, Francesco, Alexis Cuquel, and Mirko Bothien. 2022. “Autoignition Flame Transfer Matrix : Analytical Model versus Large Eddy Simulations.” International Journal of Spray and Combustion Dynamics 14 (1-2): 72–81. https://doi.org/10.1177/17568277221086261.
Gant, Francesco, et al. “Autoignition Flame Transfer Matrix : Analytical Model versus Large Eddy Simulations.” International Journal of Spray and Combustion Dynamics, vol. 14, no. 1-2, 2022, pp. 72–81, https://doi.org/10.1177/17568277221086261.


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