MEASUREMENT AND ANALYSIS OF THERMOACOUSTIC OSCILLATIONS IN A SIMPLE DUMP COMBUSTOR

A study of the spectral characteristics of the temperature, pressure, heat release and velocity fluctuations associated with combustion oscillations has been carried out in a laboratory dump combustor burning premixed butane and air. The interactions between the different fluctuating variables have been measured. The trends in the relative phases of these parameters and their implication for the driving mechanism and the modelling of thermoacoustic instability are assessed.