Effects of syngas composition on combustion induced vortex breakdown (CIVB) flashback in a swirl stabilized combustor

► We investigated CIVB flashback propensity of H2-CO and actual syngas mixtures. ► Presence of H2 in the fuel mixtures dictated the flashback tendency. ► Higher Swirl Number decreased the flashback propensity of the mixtures. ► A flame quenching was developed to parameterize the fuel composition effect.