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 …

Hybrid rich-and lean-premixed ammonia-hydrogen combustion for mitigation of NOx emissions and thermoacoustic instabilities

U **, KT Kim - Combustion and Flame, 2024 - Elsevier
The large-scale direct utilization of two carbon-free fuels, ammonia and hydrogen, is
currently attracting significant interest in the context of the development of new gas turbine …

Experimental investigation of combustion instability in a centrally staged combustor under self-excited oscillation conditions

J Ma, M Han, X Han, X Hui, X Xue - Physics of Fluids, 2023 - pubs.aip.org
This paper presents an experimental investigation of combustion instability and flame
dynamics in a laboratory-scale lean premixed prevaporized centrally staged combustor …

Forced response of transverse reacting jet in vitiated crossflow to harmonic velocity disturbances

Y Choi, G Han, KT Kim - Combustion and Flame, 2024 - Elsevier
The orthogonally oriented injector configuration typically used in axial fuel staging-capable
gas turbine combustors is known to produce complicated thermoacoustic interactions …

[HTML][HTML] Mitigating thermoacoustic instabilities in premixed hydrogen flames using axial staging

A Ånestad, E Æsøy, JR Dawson, NA Worth - Proceedings of the …, 2024 - Elsevier
In this paper we demonstrate how axial staging can be utilised to mitigate thermoacoustic
instabilities in a combustion system by flame redistribution. This is achieved by moving flow …

Flame stability and emissions of a multi-nozzle array combustor fueled hydrogen enriched fuel under fuel staging conditions

Z Liu, Y **ong, X Wei, N Yang, Y Ben, S Zhang… - International Journal of …, 2025 - Elsevier
Achieving efficient and stable combustion of pure hydrogen fuel is the key to the
development of gas turbine combustors to meet the goals of carbon peaking and carbon …

Mutual synchronization and flame dynamics in an axially fuel-staged lean-premixed combustion system

Y Guan, Y Choi, P Liu, KT Kim - Proceedings of the Combustion Institute, 2024 - Elsevier
We experimentally study the acoustic coupling direction between two stages and the flame-
acoustic interaction within and across stages in an axially fuel-staged lean-premixed …

[HTML][HTML] Combustion characteristics of axial fuel staging nozzles for gas turbine combustors

J Hwang, MK Kim, WJ Lee, K Min, HS Kim - Journal of the Korean …, 2023 - jkosco.org
Axial fuel staging (AFS) nozzle variants for applying to heavy duty gas turbine combustors
were designed and experimentally investigated in this study. Four AFS nozzle variants …

[HTML][HTML] Amplification of Combustion Instabilities in a Lean-premixed Axially-staged Combustor due to Frequency Synchronization

Y Choi, G Han, KT Kim - Journal of the Korean Society of Combustion, 2024 - jkosco.org
The self-excited dynamics of a lean-premixed axially-staged combustor, with respect to the
characteristic acoustic frequency, were experimentally investigated by varying the hydrogen …

희박 예혼합 다단 연소기에서의 주파수 동조에 의한 연소불안정 증폭

최용석, 한경현, 김규태 - 한국연소학회지, 2024 - dbpia.co.kr
The self-excited dynamics of a lean-premixed axially-staged combustor, with respect to the
characteristic acoustic frequency, were experimentally investigated by varying the hydrogen …