MODELING OF THERMOACOUSTIC OSCILLATIONS IN ANNULAR COMBUSTOR

摘要

An approach for modeling combustion instabilities in annular combustors is presented. The main feature that distinguishes the method from other existing approaches is the coupled consideration of acoustics of multiple burners in an annular arrangement. The developed method allows modeling of annular combustors with an arbitrary number of different burners. The influence of azimuthal nonuniformities due to different burner characteristics on the combustor pulsations in a gas turbine combustor is investigated. It is shown that the instability growth rate is strongly influenced by the burner arrangement.