It is accepted that the thermoacoustic behavior of a given combustion system can be
analyzed by investigating how its natural acoustic modes are perturbed by the flame …

Thermoacoustic systems can exhibit self-excited instabilities of two nature, namely cavity
modes or intrinsic thermoacoustic (ITA) modes. In heavy-duty land-based gas turbines with …

The Galerkin modal expansion is a well-known method used to develop reduced order
models for thermoacoustics. A known issue is the appearance of Gibbs-type oscillations on …

Short wavelength hydrodynamic perturbations excited by long wavelength acoustics can
wrinkle the front of acoustically compact flames, perturb the heat release rate, and generate …

The present study makes use of the adjoint modes of the Linearized Reactive Flow (LRF)
equations to investigate the Intrinsic Thermoacoustic (ITA) feedback loop of a laminar …

This thesis aims at expanding the understanding of the thermoacoustic spectra of gas
turbines. A categorization criterion is proposed to determine the nature of eigenmodes. The …

Power generation and aircraft gas turbine combustors are frequently operated under fuel
lean conditions to mitigate harmful emissions, rendering them susceptible to undesirable …