Thermoacoustic Instability in Combustors

AS Morgans, D Yang - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
Thermoacoustic instability is a flow instability that arises due to a two-way coupling between
acoustic waves and unsteady heat release rate. It can cause damaging, large-amplitude …

Characterization of nonlinear responses of non-premixed flames to low-frequency acoustic excitations

D Pan, C Ji, T Zhu - Applied Sciences, 2023 - mdpi.com
Featured Application Stable design of Combustor in industrial boiler and burner. Abstract
The response of flames' heat release to acoustic excitation is a critical factor for …

Determination of the heat conduction transfer function within the thermoacoustic instability limit cycle in a Rijke tube

T Liu, J Li, S Zhu, L Yang - Applied Thermal Engineering, 2022 - Elsevier
In this work, experimental measurements of the heat conduction transfer function (HCTF)
within the limit cycle of thermoacoustic instabilities were conducted associated with a …

On the flame transfer function models for laminar premixed conical and V-flames considering the stretch effect

Y Tian, L Yang, AS Morgans, J Li - Combustion and Flame, 2023 - Elsevier
This paper investigates a predictive model that considers the impact of stretch on the
dynamic response of laminar premixed conical and V-flames; the flame stretch consists of …

Consequences of flame geometry for the acoustic response of premixed flames

T Steinbacher, A Albayrak, A Ghani, W Polifke - Combustion and Flame, 2019 - Elsevier
This study investigates the consequences of flame geometry for the linear response of
laminar premixed flames to acoustic perturbations, as expressed by the flame transfer …

A weakly nonlinear analytical model for the transversely forced flame describing function of a slit flame

T Liu, J Li, Y Song, L Yang - Fuel, 2021 - Elsevier
In this work, a weakly nonlinear analytical model of the flame describing function (FDF) of a
two-dimensional laminar premixed slit flame subjected to both transverse perturbations and …

A comparison of the transfer functions and flow fields of flames with increasing swirl number

M Gatti, R Gaudron, C Mirat… - … Expo: Power for …, 2018 - asmedigitalcollection.asme.org
The frequency response of premixed swirled flames is investigated by comparing their
Transfer Function (FTF) between velocity and heat release rate fluctuations. The …

The effects of injector size on the dynamics and instabilities of lean premixed swirling flame

G Wang, L Xu, L Li, X Liu, F Qi, TF Guiberti… - Aerospace Science and …, 2022 - Elsevier
The external-and self-excited premixed swirling flames are experimentally studied to
understand the thermoacoustic instabilities under different injector sizes. We use high-speed …

Experimental investigation on the effects of transverse injection distribution scheme on dual flame dynamics subjected to flow disturbances

T Liu, P Wang, J Li, L Yang, Z Ren - Aerospace Science and Technology, 2024 - Elsevier
Combustion instability has become a major problem in low-emission annular gas turbine
combustors. It is of practical importance to investigate the effects of transverse nozzle …

Decomposition of swirling flame transfer function in the complex space

G Wang, TF Guiberti, X Xia, L Li, X Liu, WL Roberts… - Combustion and …, 2021 - Elsevier
In this work, we propose an analytical decomposition of the flame transfer function (FTF) in
the complex space. The decomposition provides new insight into the relationship between …