Effect of hydrogen enrichment on the dynamics of a lean technically premixed elevated pressure flame

I Chterev, I Boxx - Combustion and Flame, 2021 - Elsevier
The heat release distribution, combustion instability characteristics and flow dynamics of
lean swirl-stabilized flames of hydrogen enriched natural gas were studied using time …

On the impact of H2-enrichment on flame structure and combustion dynamics of a lean partially-premixed turbulent swirling flame

PW Agostinelli, D Laera, I Chterev, I Boxx… - Combustion and …, 2022 - Elsevier
Abstract Large Eddy Simulation (LES) with Conjugate Heat Transfer (CHT) is used to
analyze the impact of H 2-enrichment on the flame structure and combustion dynamics of a …

Flame interactions in a stratified swirl burner: Flame stabilization, combustion instabilities and beating oscillations

X Han, D Laera, D Yang, C Zhang, J Wang, X Hui… - Combustion and …, 2020 - Elsevier
The present article investigates the interactions between the pilot and main flames in a novel
stratified swirl burner using both experimental and numerical methods. Experiments are …

Large Eddy Simulation of a dual swirl gas turbine combustor: Flame/flow structures and stabilisation under thermoacoustically stable and unstable conditions

ZX Chen, I Langella, N Swaminathan, M Stöhr… - Combustion and …, 2019 - Elsevier
A laboratory gas turbine model combustor with dual-swirler configuration is investigated
using Large Eddy Simulation (LES) with a flamelet subgrid combustion model. Two partially …

[HTML][HTML] Impact of H2-enrichment on the response of a partially premixed CH4–air flame to velocity and equivalence ratio fluctuations

AM Garcia, S Le Bras, J Prager, I Boxx, W Polifke - Combustion and Flame, 2024 - Elsevier
The dynamics of hydrogen-enriched partially premixed methane–air flames are investigated,
focusing on the frequency response to velocity and equivalence ratio fluctuations. Large …

Modal dynamics of self-excited thermoacoustic instabilities in even and odd numbered networks of lean-premixed combustors

K Moon, D Bae, KT Kim - Combustion and Flame, 2023 - Elsevier
Can-to-can acoustic interactions in a circumferential network of lean-premixed combustors
have a prominent role in the development of complicated modal dynamics and large-scale …

Influence of radial fuel staging on combustion instabilities and exhaust emissions from lean-premixed multi-element hydrogen/methane/air flames

U Jin, KT Kim - Combustion and Flame, 2022 - Elsevier
The utilization of hydrogen-blended hydrocarbon fuels, or even completely carbon-free fuels
like pure hydrogen and ammonia, will be indispensable in the effort to reduce anthropogenic …

Scale Adaptive Simulation of a thermoacoustic instability in a partially premixed lean swirl combustor

JM Lourier, M Stöhr, B Noll, S Werner, A Fiolitakis - Combustion and Flame, 2017 - Elsevier
The thermoacoustic oscillation of a turbulent, swirl-stabilized, partially premixed flame in the
PRECCINSTA gas turbine model combustor is analyzed by means of a Scale Adaptive …

Experimental study of transient mechanisms of bistable flame shape transitions in a swirl combustor

M Stöhr, K Oberleithner… - … of Engineering for …, 2018 - asmedigitalcollection.asme.org
Sudden changes of flame shape are an undesired, yet poorly understood feature of swirl
combustors used in gas turbines. The present work studies flame shape transition …

Combustion-acoustic interactions through cross-talk area between adjacent model gas turbine combustors

K Moon, H Jegal, J Gu, KT Kim - Combustion and Flame, 2019 - Elsevier
Longitudinal-mode combustion instabilities in can-annular gas turbine combustion systems
are influenced by acoustic interactions between adjacent combustors; these interactions …