Nonlinear self-excited thermoacoustic oscillations of a ducted premixed flame: bifurcations and routes to chaos

K Kashinath, IC Waugh, MP Juniper - Journal of Fluid Mechanics, 2014 - cambridge.org
Thermoacoustic systems can oscillate self-excitedly, and often non-periodically, owing to
coupling between unsteady heat release and acoustic waves. We study a slot-stabilized two …

The effect of the flame phase on thermoacoustic instabilities

G Ghirardo, MP Juniper, MR Bothien - Combustion and Flame, 2018 - Elsevier
This paper concerns the influence of the phase of the heat release response on
thermoacoustic systems. We focus on one pair of degenerate azimuthal acoustic modes …

Two-line (CH∗/CO2∗) chemiluminescence technique for equivalence ratio mapping in turbulent stratified flames

MM Kamal - Energy, 2020 - Elsevier
Equivalence ratio fluctuations play an important role in exploring and controlling flame
dynamic instabilities such as thermoacoustic combustion instabilities associated with lean …

Investigations on the self-excited oscillations in a kerosene spray flame

M de la Cruz García, E Mastorakos, AP Dowling - Combustion and Flame, 2009 - Elsevier
A laboratory scale gas turbine type burner at atmospheric pressure and with air preheat was
operated with aviation kerosene Jet-A1 injected from a pressure atomiser. Self-excited …

Dynamics of robust structures in turbulent swirling reacting flows

S Roy, T Yi, N Jiang, GH Gunaratne… - Journal of Fluid …, 2017 - cambridge.org
High-speed synchronized stereo particle-imaging velocimetry and OH planar laser-induced
fluorescence (PIV/OH-PLIF) measurements are performed on multiple) respectively. Planar …

Nonlinear interactions of multiple linearly unstable thermoacoustic modes

JP Moeck, CO Paschereit - International Journal of Spray …, 2012 - journals.sagepub.com
We investigate the dynamics of thermoacoustic systems with multiple linearly unstable
modes. If a linear analysis reveals more than one mode with positive growth rate, nonlinear …

Assessment of LES subgrid-scale models and investigation of hydrodynamic behaviour for an axisymmetrical bluff body flow

CY Lee, S Cant - Flow, turbulence and combustion, 2017 - Springer
This work is concerned with the investigation of fluid-mechanical behaviour and the
performance of different subgrid-scale models for LES in the numerical prediction of a …

LES investigation of two frequency effects on acoustically forced premixed flame

X Han, J Yang, J Mao - Fuel, 2016 - Elsevier
Turbulent lean premixed combustion has high potentials for the development of modern low
nitrogen oxide gas turbines. However, it renders the combustor prone to combustion …

Nonlinear interactions between the fundamental and higher harmonics of self-excited combustion instabilities

KT Kim - Combustion Science and Technology, 2017 - Taylor & Francis
Measurements of self-excited combustion instability were performed in a lean-premixed,
swirl-stabilized, gas turbine combustor in order to characterize the interaction between the …

Extracting flame describing functions in the presence of self-excited thermoacoustic oscillations

S Balusamy, LKB Li, Z Han, S Hochgreb - Proceedings of the Combustion …, 2017 - Elsevier
One of the key elements in the prediction of thermoacoustic oscillations is the determination
of the acoustic response of flames as an element in an acoustic network, in the form of a …