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Low-order modelling of the light-round ignition transient in a premixed annular combustor

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This work presents a series of simulations of the light-round process in a premixed annular combustor, consisting of 18 individual swirl bluff body burners, using improvements to the previously-published stochastic low-order model SPINTHIR that mimics flame propagation with a Langevin particle model and continuous new particle generation. The improvements presented include the effect of dilatation and a stochastic component to the quenching criterion, resulting in capturing reasonably well the bending behaviour of the turbulent flame speed with turbulent intensity. The results showed that the light-round mechanism was well reproduced compared to experiments. The various versions of the model captured the trend of light-round time τLR as a function of the mixture’s laminar flame speed with different degrees of accuracy. Overall, the results here reported improve our low-order capability to model the ignition transient in complex multi-burner configurations, which can help the design process of gas turbine combustors.



SPINTHIR, low-order simulations, light-round, annular combustor, ignition

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Combustion Theory and Modelling

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Informa UK Limited
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (765998)
European Commission Horizon 2020 (H2020) Industrial Leadership (IL) (785349)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (765998)
European Union Marie-Curie project ANNULIGHT (Grant Agreement No. 765998), and Clean Sky 2 project PROTEUS (Grant Agreement No 785349).

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2023-08-01 11:46:52
Published version created
2022-01-06 00:32:00
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