Assessment of tabulated chemistry models for the les of a model aero-engine combustor
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/379028
Tipus de documentComunicació de congrés
Data publicació2022
EditorGlobal Power and Propulsion Society (GPPS)
Condicions d'accésAccés obert
Llevat que s'hi indiqui el contrari, els
continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 4.0 Internacional
ProjecteCoEC - Center of Excellence in Combustion (EC-H2020-952181)
ESTiMatE - Emissions SooT ModEl (EC-H2020-821418)
ESTiMatE - Emissions SooT ModEl (EC-H2020-821418)
Abstract
Tabulated chemistry methods present a compromise between computational cost and the ability to capture complex
combustion physics in high-fidelity numerical simulations. The application of such models entails a number of modeling
decisions, that may affect the simulation results significantly, especially in partially premixed combustion, where the assumption of the existence of underlying premixed or non-premixed flamelet structures is arguable. In this work, different
classical tabulation strategies are assessed in terms of their ability to predict the lift-off induced by localized extinction in
a model aero-engine combustion chamber: the Cambridge swirl spray flame. The lift-off dynamics of the stable n-heptane
spray flame are compared using: i) premixed flamelets, ii) stable and unstable counterflow diffusion flamelets, iii) stable
and unsteady extinguishing counterflow diffusion flamelets, iv) unsteady extinguishing and reigniting counterflow diffusion
flamelets at a given strain rate. The extinction and reignition events associated to the lift-off are validated against OH-PLIF
measurements, and the temporal evolution of the lift-off and reattachment is analyzed.
CitacióBoth, A.; Mira Martínez, D.; Lehmkuhl Barba, O. Assessment of tabulated chemistry models for the les of a model aero-engine combustor. A: Global Power and Propulsion Society International Technical Conference. "Proceedings of Global Power and Propulsion Society, GPPS Chania22, 18th-20th September, 2022". Global Power and Propulsion Society (GPPS), 2022,
ISSN2504-4400
Versió de l'editorhttps://gpps.global/wp-content/uploads/2022/09/GPPS-TC-2022_paper_70.pdf
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