An experimental study of thermo-acoustic behaviour of premixed (methane-air) single Bun-sen type flames is performed on a pilot flame anchored round tube burner. The evolution of thermo-acoustic transfer function from laminar to turbulent combustion regime is studied. The effect of changing the equivalence ratio in both the combustion regimes is discussed. A phenomenological fit function for measured transfer function in laminar as well as in turbulent regime is proposed. The system acoustic time delay, in turbulent regime, was estimated from the flame kinematics. This sys-tem acoustic time delay can also be calculated a-priori by knowing the burner diameter and flame speed (from turbulent flame speed models) only.
|Title of host publication||Proceedings of the 16th International Congress on Sound and Vibration (ICSV 16), 5-9- july 2009, Kraków, Poland|
|Publication status||Published - 2009|