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 …

Combustion noise comprises two components: direct combustion noise and indirect
combustion noise. The latter is the lesser studied, with entropy noise believed to be its main …

Combustion noise is becoming increasingly important as a major noise source in
aeroengines and ground based gas turbines. This is partially because advances in design …

The entropy noise mechanism was investigated both experimentally and numerically on a
generic test case. The model experiment features electrical heating to generate non …

This paper considers the effect of flow advection on entropy waves. The interest is in
whether entropy waves persist in gas turbine combustors, between the flame, where they …

The development and transmission of sound through the exit of an aero-engine combustor is
often investigated by modelling the complex geometry as a convergent-divergent nozzle …

A large-eddy simulation (LES) of a next-generation combustor is performed to examine
effects of this combustor concepts on direct and indirect combustion noise characteristics …

The aim of this work is to study the role of the liquid phase in the thermoacoustic coupling,
which subsequently leads to combustion instabilities. Experimental investigations were …

THE requirement for NOx abatement in technical combustion systems led to the
development of low-emission combustion technologies, such as rich-quench-lean (RQL) …

This paper presents the effect of axial acoustic fields on an air-atomized spray. In these
experiments, a spray of ethanol is established in a transparent test section in which an …