Experimental investigation of the linear and non-linear dynamics of a ducted, laminar premixed flame

摘要: This work investigates experimentally the linear and non-linear dynamics of a ducted, conical, laminar premixed flame under forced acoustic excitation. Upstream travelling waves hit at varying amplitudes. The transfer function is measured. In particular, for velocity disturbance amplitudes close to mean flow phase shows significant difference that weak Instantaneous images excitation suggest non-linearity associated with movement base high levels of excitation, which assumed fixed in kinematic theory. Further by group will attempt explain how comes into play higher forcing