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 …

The unsteady response of a flame to acoustic or flow perturbations plays a crucial role in
thermoacoustic combustion instability. The majority of studies on this subject presents and …

This paper utilizes Cauchy's argument principle in the frequency domain to develop novel
stability maps, providing guidelines for measures which can be taken to mitigate …

Thermoacoustic instabilities in stationary gas turbines may cause high-amplitude limit
cycles, leading to damaged components and costly down-time. To better understand the …

The study of the vibrational modes and stability of a given physical system is strongly tied to
the efficient numerical evaluation of its eigenvalues. The operators governing the …

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 …

In this study, we connect concepts that have been recently developed in thermoacoustics,
specifically (i) high-order spectral perturbation theory,(ii) symmetry-induced degenerate …

Nonlinear eigenvalue problems (NLEVPs) arise in thermoacoustics by considering the
temporal evolution of small perturbations in the relevant governing equations. In this work …

Operation under stable conditions is an important prerequisite for gas turbine safety. While
recent studies have focused primarily on acoustic design to avoid thermoacoustic …

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 …