Numerical assessment of the effect of hydrogen enrichment of a technically premixed swirl-stabilized natural gas flame
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hdl:2117/395860
Document typeConference report
Defense date2023
PublisherAmerican Society of Mechanical Engineers (ASME)
Rights accessOpen Access
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ProjectHyBurn - Enabling Hydrogen-enriched burner technology for gas turbines through advanced measurement and simulation (EC-H2020-682383)
CoEC - Center of Excellence in Combustion (EC-H2020-952181)
CALCULO DE NUEVOS DESARROLLOS NUMERICOS PARA AHEAD (AEI-PID2020-118387RB-C33)
IMPLEMENTACION Y VALIDACION DE MODELOS HPC DE COMBUSTION Y EMISIONES PARA EL ANALISIS DE SISTEMAS DE TRANSPORTE SOSTENIBLES (AEI-TRA2017-89139-C2-2-R)
CoEC - Center of Excellence in Combustion (EC-H2020-952181)
CALCULO DE NUEVOS DESARROLLOS NUMERICOS PARA AHEAD (AEI-PID2020-118387RB-C33)
IMPLEMENTACION Y VALIDACION DE MODELOS HPC DE COMBUSTION Y EMISIONES PARA EL ANALISIS DE SISTEMAS DE TRANSPORTE SOSTENIBLES (AEI-TRA2017-89139-C2-2-R)
Abstract
High-fidelity large eddy simulations (LES) are conducted for lean natural gas flames with different levels of hydrogen enrichment in a technically premixed swirl-stabilized combustor (PRECCINSTA) operated at atmospheric pressure. The modelling approach relies on tabulation of premixed flamelets and presumed-shape probability density functions (PDF) to account for subgrid turbulence-chemistry interactions. Results are presented for non-reacting and reacting conditions with 0, 40 and 50% hydrogen content in the natural gas. The influence of hydrogen-enrichment is investigated here by combining LES with Raman measurements. The assessment of LES shows good predictions of the flame stabilization mechanism, flow field and flame dynamics as compared to experiments. The natural gas flame develops a self-excited flow oscillation characterized as a precessing vortex core, which is well reproduced by the LES. The lean operation of the burner with natural gas shows a stable M-shape flame that transitions to a V-shape fully attached flame as the main fuel is blended with hydrogen. Raman measurements are compared with LES data to examine the flame structure and burning characteristics. It is concluded that hydrogen addition makes the flame more compact, induces higher reactivity of the fuel-air mixture and leads to a stable V-shape flame fully attached to the burner’s nozzle-cone.
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CitationPachano, L. [et al.]. Numerical assessment of the effect of hydrogen enrichment of a technically premixed swirl-stabilized natural gas flame. A: Turbomachinery Technical Conference & Exposition. "Proceedings of ASME Turbo Expo 2023: Turbomachinery Technical Conference and Exposition (GT2023), volume 3A: June 26-30, 2023, Boston, Massachusetts". American Society of Mechanical Engineers (ASME), 2023. ISBN 978-0-7918-8695-3. DOI 10.1115/GT2023-102634.
ISBN978-0-7918-8695-3
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