High amplitude combustion instabilities in an annular combustor inducing pressure field deformation and flame blow off

G Vignat, D Durox, A Renaud… - … of Engineering for …, 2020 - asmedigitalcollection.asme.org
This article reports experiments carried out in the laboratory scale annular combustor
MICCA-spray equipped with multiple swirling spray injectors. The experimental setup …

Intrinsic thermoacoustic feedback loop in turbulent spray flames

A Ghani, T Steinbacher, A Albayrak, W Polifke - Combustion and Flame, 2019 - Elsevier
This paper investigates low-frequency thermoacoustic instabilities of a turbulent spray flame,
a phenomenon known as 'rumble'. Based on experimental data, a network model analysis is …

Effects of acoustic excitation on pinch-off flame structure and NOx emissions in H2/CH4 flame

M Ahn, Y Yoon, S Joo - International Journal of Hydrogen Energy, 2022 - Elsevier
The flame structure and exhaust emissions of pinch-off flames, in which flames are
separated under acoustic excitation conditions, were studied. Flame structure analysis was …

[HTML][HTML] Azimuthal flame response and symmetry breaking in a forced annular combustor

HT Nygård, G Ghirardo, NA Worth - Combustion and Flame, 2021 - Elsevier
In the current study azimuthal forcing of an annular combustor with swirling flames has been
performed to present for the first time the Heat Release Rate (HRR) response to all possible …

Numerical prediction of swirl burner geometry effects on NOx emission and combustion instability in heavy oil-fired boiler

H Zhou, S Meng - Applied Thermal Engineering, 2019 - Elsevier
High NOx emission level exists in conventional heavy fuel oil (HFO) boiler due to its high-
temperature region in the downstream. In this study, separation plates are installed near the …

Flame and spray dynamics during the light-round process in an annular system equipped with multiple swirl spray injectors

K Prieur, G Vignat, D Durox… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
A successful ignition in an annular multi-injector combustor follows a sequence of steps. The
first injector is ignited; two arch-shaped flame branches nearly perpendicular to the …

Flame describing functions of a confined premixed swirled combustor with upstream and downstream forcing

R Gaudron, M Gatti, C Mirat… - … of Engineering for …, 2019 - asmedigitalcollection.asme.org
The frequency response of a confined premixed swirled flame is explored experimentally
through the use of describing functions that depend on both the forcing frequency and the …

Response of non-premixed swirl-stabilized flames to acoustic excitation and jet in cross-flow perturbations

H Zhou, Y Huang, S Meng - Experimental Thermal and Fluid Science, 2017 - Elsevier
An investigation into the response of non-premixed swirl-stabilized flames to acoustic
excitation and jet in cross-flow (JICF) perturbations was carried out. The fluctuations of OH∗ …

Study of burner geometry effects on non-premixed flame response under acoustic excitation

H Zhou, S Meng, C Tao, Z Liu - Journal of Low Frequency …, 2019 - journals.sagepub.com
The study of the flame under the acoustic excitation contributes to the study of flame self-
excited thermoacoustic instability. Although non-premixed combustion is widely used in …

Numerical prediction and suppression of thermoacoustic longitudinal mode in annular combustor

S Meng, S Wu, M Zhang, L Xu, Y Gao - AIAA Journal, 2022 - arc.aiaa.org
Many industrial applications, such as gas turbines or aeroengines, are subject to
thermoacoustic instability, especially in the lean combustion regime. In this paper, the …