Dynamic response of a ducted laminar premixed flame, part I: low amplitude forcing

Karimi, Nader and Brear, Michael and Jin, Seong-Ho and Monty, Jason (2009) Dynamic response of a ducted laminar premixed flame, part I: low amplitude forcing. In: Australian Combustion Symposium, 2-4 December 2009, The University of Queensland, Brisbane.

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Abstract

This paper presents an experimental study of the dynamics of a ducted, conical, laminar premixed flame subjected to low amplitude, acoustic excitation. The heat release response of the flame to velocity disturbances is investigated through measurement of the so called ‘flame transfer function’ for a wide range of forcing frequencies. The results agree well with those predicted by existing linear kinematic theories. The level of agreement, particularly in phase, for some of the experimental conditions appeared to be higher than any other previously reported validation of these theories. In keeping
with others, high speed photography of the flame clearly shows that the flame response includes waves on the flame front which are formed at the base and then convect along the flame.

Item Type:Conference or Workshop Item (Presentation)
Additional Information:This paper presents an experimental study of the dynamics of a ducted, conical, laminar premixed flame subjected to low amplitude, acoustic excitation. The heat release response of the flame to velocity disturbances is investigated through measurement of the so called ‘flame transfer function’ for a wide range of forcing frequencies. The results agree well with those predicted by existing linear kinematic theories. The level of agreement, particularly in phase, for some of the experimental conditions appeared to be higher than any other previously reported validation of these theories. In keeping with others, high speed photography of the flame clearly shows that the flame response includes waves on the flame front which are formed at the base and then convect along the flame.
Keywords:Laminar premixed flames, Thermo-acoustics
Subjects:H Engineering > H141 Fluid Mechanics
H Engineering > H340 Acoustics and Vibration
H Engineering > H800 Chemical, Process and Energy Engineering
H Engineering > H311 Thermodynamics
Divisions:College of Science > School of Engineering
ID Code:5895
Deposited By: Seong-Ho Jin
Deposited On:20 Jun 2012 06:15
Last Modified:20 Jun 2012 06:15

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