Abstract The influence of Intrinsic Thermoacoustic (ITA) feedback on the combustion noise
spectrum produced by a confined, turbulent, premixed, swirl flame is investigated. The …

We present a framework for performing input-output system identification near a Hopf
bifurcation using data from only the fixed-point branch, prior to the Hopf point itself. The …

Artificial neural networks are a popular nonlinear model structure and are known to be able
to describe complex nonlinear phenomena. This article investigates the capability of artificial …

Thermoacoustic Helmholtz solvers provide a cheap and efficient way of predicting
combustion instabilities. However, because they rely on the inviscid Euler equations at zero …

Incoming standards on NO x emissions are motivating many aero-engine manufacturers to
adopt the lean burn combustion concept. One of the most critical issues affecting this kind of …

The response of a laminar, premixed flame to perturbations of upstream equivalence ratio is
investigated and modelled, with emphasis on the generation of 'entropy waves', ie entropic …

A Hopf bifurcation, where a fixed-point solution loses stability and a limit cycle is born, is
prevalent in many nonlinear dynamical systems. When a system prior to a Hopf bifurcation is …

Heat exchangers are an essential constituent part of many combustion systems. The
thermoacoustic instability in such systems is a common problem and it has been studied …

The dissipation of acoustic energy in a Helmholtz resonator is investigated by means of
large eddy simulation (LES) and system identification. The dissipation mechanisms differ …

A simplified burner-heat exchanger system is numerically modeled in order to investigate
the effects of different elements on the response of the whole system to velocity excitation …