Matches in SemOpenAlex for { <https://semopenalex.org/work/W2888871103> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W2888871103 abstract "Modern ultra-low NOx combustors in land based gas turbines operate mostly in lean premixed mode, close to their lean limits making the flame susceptible to instabilities and blow out. There is significant interest in examining and predicting the lean blowout conditions using CFD and other computational tools, which have now become an integral part of combustor design and development process. However, very limited literature is currently available on the CFD prediction of lean blowout (LBO) of turbulent premixed flames. Experimental studies of LBO phenomenon reveal that flame stretch induced local extinction is the primary precursor to blowout. Turbulent Flame Speed Closure model with Strain and Heat Loss Effects (TFC-SHL), and without these effects i.e. the Standard TFC model (STFC), have been employed in LES framework for this computational study. These two models have been evaluated for their capabilities to correctly predict stabilization and blowout of turbulent lean premixed flames. Recognizing that heat loss enhances sensitivity of flame to strain, combined influence of strain and heat loss was thus anticipated to capture the local extinction events and eventually the flame blowout. A simple lab-scale, conical bluff-body combustor configuration from University of Cambridge was selected for computing lean premixed methane-air flames. LBO was approached by reducing the mixture equivalence ratio. LES simulations were performed in ANSYS Fluent 17.0, wherein, a user defined function (UDF) implementing the TFC-SHL model was used. Simulation results were validated against available OH-PLIF and OH* Chemiluminescence experimental data. The Extended TFC model, predicts experimentally observed changes in flame structure, as it approaches blowout with increasingly lean mixtures. and many important aspects of blowout dynamics. On the contrary, the STFC model, gives flawed results with incorrect flame structure and the flame burning strongly at blowout condition. While Standard TFC (STFC) is unable to predict flame extinction, Extended TFC (TFC-SHL) can capture extinction at the experimentally determined blowout point. Improvements in predictive capability of Extended model can be attributed to the inclusion of strain and heat loss effects. This study in general also emphasize that enhancing physics in combustion models can significantly improve CFD predictions of important phenomenon in combustion." @default.
- W2888871103 created "2018-09-07" @default.
- W2888871103 creator A5049045775 @default.
- W2888871103 date "2017-12-01" @default.
- W2888871103 modified "2023-09-26" @default.
- W2888871103 title "Flame Stabilization and Lean Blowout Prediction by LES Combustion Model with Strain and Heat Loss Effects" @default.
- W2888871103 hasPublicationYear "2017" @default.
- W2888871103 type Work @default.
- W2888871103 sameAs 2888871103 @default.
- W2888871103 citedByCount "0" @default.
- W2888871103 crossrefType "dissertation" @default.
- W2888871103 hasAuthorship W2888871103A5049045775 @default.
- W2888871103 hasConcept C105923489 @default.
- W2888871103 hasConcept C116915560 @default.
- W2888871103 hasConcept C121332964 @default.
- W2888871103 hasConcept C127413603 @default.
- W2888871103 hasConcept C129474609 @default.
- W2888871103 hasConcept C148414945 @default.
- W2888871103 hasConcept C1633027 @default.
- W2888871103 hasConcept C178790620 @default.
- W2888871103 hasConcept C185592680 @default.
- W2888871103 hasConcept C192562407 @default.
- W2888871103 hasConcept C196558001 @default.
- W2888871103 hasConcept C203032635 @default.
- W2888871103 hasConcept C2780411076 @default.
- W2888871103 hasConcept C39432304 @default.
- W2888871103 hasConcept C57879066 @default.
- W2888871103 hasConcept C78519656 @default.
- W2888871103 hasConcept C83104080 @default.
- W2888871103 hasConceptScore W2888871103C105923489 @default.
- W2888871103 hasConceptScore W2888871103C116915560 @default.
- W2888871103 hasConceptScore W2888871103C121332964 @default.
- W2888871103 hasConceptScore W2888871103C127413603 @default.
- W2888871103 hasConceptScore W2888871103C129474609 @default.
- W2888871103 hasConceptScore W2888871103C148414945 @default.
- W2888871103 hasConceptScore W2888871103C1633027 @default.
- W2888871103 hasConceptScore W2888871103C178790620 @default.
- W2888871103 hasConceptScore W2888871103C185592680 @default.
- W2888871103 hasConceptScore W2888871103C192562407 @default.
- W2888871103 hasConceptScore W2888871103C196558001 @default.
- W2888871103 hasConceptScore W2888871103C203032635 @default.
- W2888871103 hasConceptScore W2888871103C2780411076 @default.
- W2888871103 hasConceptScore W2888871103C39432304 @default.
- W2888871103 hasConceptScore W2888871103C57879066 @default.
- W2888871103 hasConceptScore W2888871103C78519656 @default.
- W2888871103 hasConceptScore W2888871103C83104080 @default.
- W2888871103 hasLocation W28888711031 @default.
- W2888871103 hasOpenAccess W2888871103 @default.
- W2888871103 hasPrimaryLocation W28888711031 @default.
- W2888871103 hasRelatedWork W1681262283 @default.
- W2888871103 hasRelatedWork W2011080909 @default.
- W2888871103 hasRelatedWork W2036078133 @default.
- W2888871103 hasRelatedWork W2037651915 @default.
- W2888871103 hasRelatedWork W2044892537 @default.
- W2888871103 hasRelatedWork W2047153669 @default.
- W2888871103 hasRelatedWork W2092745995 @default.
- W2888871103 hasRelatedWork W2103701601 @default.
- W2888871103 hasRelatedWork W2277850136 @default.
- W2888871103 hasRelatedWork W2312917716 @default.
- W2888871103 hasRelatedWork W2349869650 @default.
- W2888871103 hasRelatedWork W2545433839 @default.
- W2888871103 hasRelatedWork W2809456656 @default.
- W2888871103 hasRelatedWork W2899176439 @default.
- W2888871103 hasRelatedWork W2996564198 @default.
- W2888871103 hasRelatedWork W3112031217 @default.
- W2888871103 hasRelatedWork W3170679456 @default.
- W2888871103 hasRelatedWork W3200156452 @default.
- W2888871103 hasRelatedWork W854031276 @default.
- W2888871103 hasRelatedWork W2161257103 @default.
- W2888871103 isParatext "false" @default.
- W2888871103 isRetracted "false" @default.
- W2888871103 magId "2888871103" @default.
- W2888871103 workType "dissertation" @default.