Nine decades of rocket engine and gas turbine development have shown that
thermoacoustic oscillations are difficult to predict but can usually be eliminated with …

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 …

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 …

Practical passive control solutions for azimuthal thermoacoustic instabilities in annular
combustors, which typically involve symmetry-breaking strategies, have garnered increasing …

This article deals with the symmetry breaking of azimuthal thermoacoustic modes in annular
combustors. Using a nominally symmetric annular combustor, we present experimental …

In an acoustic cavity with a heat source, such as a flame in a gas turbine, the thermal energy
of the heat source can be converted into acoustic energy, which may generate a loud …

Gas turbines and rocket engines sometimes suffer from violent oscillations caused by
feedback between acoustic waves and flames in the combustion chamber. These are known …

In this paper, non-intrusive polynomial chaos expansion (NIPCE) is used for forward
uncertainty quantification and sensitivity analysis of thermoacoustic stability of two premixed …

Gas-turbine combustion chambers typically consist of nominally identical sectors arranged
in a rotationally symmetric pattern. However, in practice, the geometry is not perfectly …

We present an adjoint-based method for the calculation of eigenvalue perturbations in
nonlinear, degenerate and non-self-adjoint eigenproblems. This method is applied to a …