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 …

Thermoacoustic instabilities are one of the most challenging problems faced by gas turbine
and rocket motor manufacturers. The key instability mechanism is described by the Rayleigh …

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 …

Helmholtz resonators (HRs) are widely used to damp acoustic oscillations, including in the
combustors of aero-engines and power gas turbines where they damp thermoacoustic …

The effect of inlet boundaries on combustion instabilities in a spray combustor is
investigated experimentally in this paper. The combustor is operated at pressure-elevated …

This study analyses the interplay between classical acoustic modes and intrinsic
thermoacoustic (ITA) modes in a simple thermoacoustic system. The analysis is performed …

We construct a low-order thermoacoustic network model that contains the most influential
physical mechanisms of a thermoacoustic system. We apply it to a laboratory-scale …

In gas turbines, thermoacoustic oscillations grow if moments of high fluctuating heat release
rate coincide with moments of high acoustic pressure. The phase between the heat release …

We assimilate experimental data from nonreacting flow in the SCARLET (SCaled Acoustic
Rig for Low Emission Technologies) test rig using physics-based Bayesian inference. We …

We propose a mathematical model from physical principles to predict the sound generated
in nozzles with dissipation. The focus is on the sound generated from the acceleration of …