In a thermoacoustic system, such as a flame in a combustor, heat release oscillations couple
with acoustic pressure oscillations. If the heat release is sufficiently in phase with the …

This article reports a numerical analysis of combustion instabilities coupled by a spinning
mode or a standing mode in an annular combustor. The method combines an iterative …

Computational prediction of thermoacoustic instabilities arising in gas turbine and aero-
engine combustors still remains a challenge especially if fuel is injected in a liquid spray …

Thermoacoustic instabilities in annular gas turbine combustors often involve modes which
vary in both the longitudinal and circumferential directions. Recent experimental studies …

This article reports experiments carried out in the laboratory scale annular combustor
MICCA-spray equipped with multiple swirling spray injectors. The experimental setup …

This paper presents an analytical solution for the one-dimensional acoustic field in a duct
with arbitrary mean temperature gradient and mean flow. A wave equation for the pressure …

Lean premixed combustion allows NOx emissions to be minimised while keeping other
pollutants, eg, CO, at low levels in industrial gas turbines or aero-engines [1]. Unfortunately …

We perform a conceptual study about the linear stability of a hydrogen-enriched methane-air
premixed laminar flame inside a cylindrical duct with both ends open. The flame and …

Depending on the reflectional and rotational symmetries of annular combustors for
aeroengines and gas turbines, self-sustained azimuthal thermoacoustic eigenmodes can be …

Thermoacoustic instabilities originate from the interaction of unsteady heat release rate
associated with flames and the acoustic modes of a combustor. A feedback loop not …