Camporeale, et al.. Flame Describing Function analysis of spinning and standing modes in an annular combustor and comparison with experiments. Combustion and Flame, Elsevier, 2017, 184, pp.(D. Laera).merical procedure combining the Flame Describing Function (FDF) framework with a Helmholtz solver to analyze azimuthal instabilities:• Specific iterative algorithms are developed to simulate the dynamics of spinning and standing modes within the FDF framework. • This is tested first on a system represented by an ideal flame response and results of recent analytical investigations are fully retrieved validating this methodology.where ψ ( )/ ψ max is the normalized azimuthal eigenmode structure. The numerical implementation of this model in the

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The present article investigates the correlation between flame macrostructures and thermoacoustic combustion instabilities in stratified swirling flames. Experiments are carried out in a laboratory scale longitudinal test rig equipped with the Beihang Axial Swirler Independently-Stratified (BASIS) burner, a

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