Low-order modelling of the light-round ignition transient in a premixed annular combustor
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.
Online Publication Date
European Commission Horizon 2020 (H2020) Industrial Leadership (IL) (785349)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (765998)