The effect of heat transfer on acoustics in burner stabilized flat flames

Modern central heating systems use low NO$_x$ premixed burners with a large modulation range. This can lead to noise problems which cannot be solved via trial and error, but need accurate modelling. An acoustic analysis as part of the design phase can reduce the time-to-market considerably, but the acoustic response of the flame is an unknown and complex key-factor. In this study, the influence of the heat transfer between the gas and the burner on the acoustic transfer coefficient is studied numerically and compared to experimental results for burners with different volumetric heat transfer coefficients. It is found that this influence is significant and that for the materials studied the heat transfer cannot be neglected