The dynamics of hydrogen-enriched partially premixed methane–air flames are investigated,
focusing on the frequency response to velocity and equivalence ratio fluctuations. Large …

Modelling the flame response of turbulent flames via data-driven approaches is challenging
due, among others, to the presence of combustion noise. Neural network methods have …

Entropy waves are generated in many technically relevant flow processes such as
combustion, mixing, or convective heat transfer. When accelerated, entropy waves generate …

The estimation of flame transfer functions (FTF) from time series data generated by large
eddy simulation (LES) via system identification (SI) is an important element of …

In this work, we present a parsimonious set of ordinary differential equations (ODEs),
describing with good precision and over a wide range of frequencies the linear and …

Combustion instability can lead to high amplitude oscillations of pressure in the combustion
chamber, which would seriously affect the normal operation of the combustion system. In …

Mutual coupling of (thermofluiddynamic) modes of perturbations can affect the thermo-
acoustic stability of combustors and contribute to combustion noise. For example, vortical or …

The flame dynamics of a kerosene spray flame is investigated under realistic operating
conditions (Tinlet≈ 850 K, pinlet≈ 30 bar). The present work evaluates the flame transfer …

Unsteady combustion generates not only acoustic waves, but also fluctuations of the burnt
gas temperature—referred to as entropy waves. These waves are convected by the mean …

Modelling flame dynamics is an essential topic in the combustion community and is
challenging because of the complicated, nonlinear dynamics involved. This dissertation …