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LES/CMC Modelling of a Gas Turbine Model Combustor with Quick Fuel Mixing

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cam.issuedOnline2018-11-05
dc.contributor.authorZhang, H
dc.contributor.authorMastorakos, E
dc.contributor.orcidMastorakos, Epaminondas [0000-0001-8245-5188]
dc.date.accessioned2018-12-04T00:30:47Z
dc.date.available2018-12-04T00:30:47Z
dc.date.issued2019
dc.description.abstractThe first-order, single-conditioned sub-grid Conditional Moment Closure (CMC) model for Large Eddy Simulation (LES) is applied to simulate a globally lean swirling methane flame in a gas turbine model combustor that has been studied experimentally. The time-averaged velocity, mixture fraction, temperature, major species and OH mass fractions, and the heat release rate are predicted well for most locations. A transient lift-off and flashback of the flame root due to localized extinction near the burner exit is observed that is qualitatively consistent with the experimental measurements. The time-averaged temperature is over-predicted very close to the fuel injection point, while it is accurately reproduced downstream. Comparisons of instantaneous conditionally-filtered temperature in mixture fraction space shows that the LES/CMC reproduces the large scatter of the experimental data points in temperature‒mixture fraction plane that span the full range unburnt to fully burnt, but to a smaller extent, suggesting a minor under-prediction of local extinction or the inaccuracy of the present first-order, coarse-grid CMC formulation to capture locally premixed flame propagation behaviour. Periodic variation of the heat release rate is observed with a frequency close to that of the measured Precessing Vortex Core (PVC). In general, the current LES/CMC model captures most features of this high-mixing-rate nominally non-premixed swirl flame in a gas turbine model combustor in agreement with experimental measurements.
dc.identifier.doi10.17863/CAM.33564
dc.identifier.eissn1573-1987
dc.identifier.issn1386-6184
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286252
dc.language.isoeng
dc.publisherSpringer Science and Business Media LLC
dc.publisher.urlhttp://dx.doi.org/10.1007/s10494-018-9988-1
dc.subjectGas turbine model combustor
dc.subjectFuel-lean combustion
dc.subjectSwirl-stabilized flames
dc.subjectLarge eddy simulation
dc.subjectConditional moment closure
dc.titleLES/CMC Modelling of a Gas Turbine Model Combustor with Quick Fuel Mixing
dc.typeArticle
dcterms.dateAccepted2018-09-20
prism.endingPage930
prism.issueIdentifier4
prism.publicationDate2019
prism.publicationNameFlow, Turbulence and Combustion
prism.startingPage909
prism.volume102
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K025791/1)
rioxxterms.licenseref.startdate2019-04-15
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1007/s10494-018-9988-1

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