Suppression of instabilities of swirled premixed flames with minimal secondary hydrogen injection

G Oztarlik, L Selle, T Poinsot, T Schuller - Combustion and Flame, 2020 - Elsevier
The impact of hydrogen addition on the dynamics of a methane-air premixed flame is
explored for different injection strategies. The configuration is a swirled injector with a central …

[HTML][HTML] The influence of hydrogen on the stability of a perfectly premixed combustor

JG Aguilar, E Æsøy, JR Dawson - Combustion and Flame, 2022 - Elsevier
In this paper we investigate the effects of increasing the amount of hydrogen in the fuel
mixture on the stability of a perfectly premixed combustor. Experiments are carried out on a …

Influence of hydrogen content and injection scheme on the describing function of swirled flames

T Schuller, S Marragou, G Oztarlik, T Poinsot… - Combustion and …, 2022 - Elsevier
The dynamics of V-shape swirled lean premixed methane/air flames enriched with hydrogen
is examined for two injection schemes. The response of the flames submitted to harmonic …

[HTML][HTML] Nonlinear dynamics of pure intrinsic thermo-acoustic modes

R Wildemans, V Kornilov, P De Goey, IL Arteaga - Combustion and Flame, 2023 - Elsevier
In this paper the nonlinear dynamics of the pure Intrinsic Thermo-Acoustic (ITA) modes are
experimentally investigated for burner stabilized premixed flames by decoupling them from …

Acoustic-convective interference in transfer functions of methane/hydrogen and pure hydrogen flames

E Æsøy, JG Aguilar, MR Bothien… - … for Gas Turbines …, 2021 - asmedigitalcollection.asme.org
We investigate the occurrence and source of modulations in the gain and phase of flame
transfer functions (FTF) measured in perfectly premixed, bluff body stabilized CH 4/H 2 and …

Do flame describing functions suitably represent combustion dynamics under self-sustained oscillations?

PR Soundararajan, G Vignat, D Durox… - Journal of Sound and …, 2022 - Elsevier
Transfer function concepts that appear in many areas and most notably in control systems
have been extensively used to represent the flame response in low-order models of …

Averaging of thermoacoustic azimuthal instabilities

G Ghirardo, F Gant - Journal of Sound and Vibration, 2021 - Elsevier
We consider the acoustic flow field of rotationally symmetric systems, like an annular
combustor and the flow in a round duct, in absence of a mean azimuthal flow field. We focus …

[PDF][PDF] Interaction of acoustic waves with a laminar counterflow flame

MA Akhtardanesh, MK Alrezaeian, M Farshchi - 9th National Conference of …, 2024 - joasi.ir
Acoustic waves can affect the heat release of a flame, also and any disturbance in the heat
release of a flame will cause the production of pressure waves. If the acoustic field and heat …

Analysis of global and local hydrodynamic instabilities on a high-speed jet diffusion flame via time-resolved 3D measurements

R Dong, Q Lei, Y Chi, E Song, W Fan - Flow, Turbulence and Combustion, 2021 - Springer
Measurements of 3D flame edge dynamics were made on a high-speed jet diffusion flame to
assess the global/local hydrodynamic instability. The flame was generated by issuing high …

Impact of the acoustic forcing level on the transfer matrix of a turbulent swirling combustor with and without flame

R Gaudron, M Gatti, C Mirat, T Schuller - Flow, Turbulence and …, 2019 - Springer
Thermoacoustic instabilities are a major issue for industrial and domestic burners. One
possible framework to study these instabilities is to represent the system by a network of …