Low-order modeling of can-annular combustors

GJJ Fournier, M Meindl, CF Silva… - … for Gas Turbines …, 2021 - asmedigitalcollection.asme.org
Heavy-duty land-based gas turbines are often designed with can-annular combustors, which
consist of a set of identical cans, acoustically connected on the upstream side via the …

Influence of rotational asymmetry on thermoacoustic instabilities in a can-annular lean-premixed combustor

K Moon, C Yoon, KT Kim - Combustion and Flame, 2021 - Elsevier
Low-frequency combustion instabilities, and ultimately, engine-level dynamics in can-
annular gas turbine combustion systems, are driven by acoustic interactions between …

Coupling-induced instability in a ring of thermoacoustic oscillators

T Pedergnana, N Noiray - Proceedings of the Royal …, 2022 - royalsocietypublishing.org
Thermoacoustic instabilities in can-annular combus-tors of stationary gas turbines lead to
unstable Bloch modes which appear as rotating acoustic pressure waves along the turbine …

Low-order modeling to investigate clusters of intrinsic thermoacoustic modes in annular combustors

GJJ Fournier, M Haeringer… - … of Engineering for …, 2021 - asmedigitalcollection.asme.org
The intrinsic thermoacoustic (ITA) feedbackloop constitutes a coupling between flow, flame
and acoustics that does not involve the natural acoustic modes of the system. One recent …

[HTML][HTML] Theoretical model of azimuthal combustion instability subject to non-trivial boundary conditions

QIN Lei, W Xiaoyu, G Zhang, SUN Xiaofeng - Chinese Journal of …, 2024 - Elsevier
The problem of evaluating the sensitivity of non-trivial boundary conditions to the onset of
azimuthal combustion instability is a longstanding challenge in the development process of …

Low-order modeling of collective dynamics of four ring-coupled turbulent thermoacoustic oscillators

Y Liao, Y Guan, P Liu, K Moon, KT Kim - Nonlinear Dynamics, 2024 - Springer
We investigate the low-order modeling of collective dynamics in a can-annular combustor
consisting of four ring-coupled turbulent lean-premixed combustors. Each combustor is …

A strategy to tune acoustic terminations of single-can test-rigs to mimic thermoacoustic behavior of a full engine

M Haeringer, GJJ Fournier… - … of Engineering for …, 2021 - asmedigitalcollection.asme.org
Thermoacoustic properties of can-annular combustors are commonly investigated by means
of single-can test-rigs. To obtain representative results, it is crucial to mimic can–can …

[HTML][HTML] Nonlinear response of conical flame to dual-frequency excitation

J Zheng, L Li, G Wang, X Xia, L Xu, F Qi - Applications in Energy and …, 2024 - Elsevier
This work investigates the nonlinear response of a conical premixed flame to dual-frequency
excitation through experiments and G-equation analysis. In addition to the responses at …

[PDF][PDF] Thermoacoustic Dynamics of Gas Turbine Combustors: Effects of Hydrogen Blending and Tunable Acoustic Boundaries

A Blondé - 2023 - research-collection.ethz.ch
It is widely acknowledged worldwide that the increase in Earth's surface temperature has to
be contained in order to limit the effect of climate changes. This is particularly vital due to …

Investigation of nonlinear flame response to dual-frequency disturbances

X Jiang, J Li, AS Morgans, L Yang, L Li… - arXiv preprint arXiv …, 2023 - arxiv.org
The two-way interaction between the unsteady flame heat release rate and acoustic waves
can lead to combustion instability within combustors. To understand and quantify the flame …