Suppression of instabilities of swirled premixed flames with minimal secondary hydrogen injection
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 …
explored for different injection strategies. The configuration is a swirled injector with a central …
Scaling and prediction of transfer functions in lean premixed H2/CH4-flames
Features of the flame transfer function (FTF) are characterized for turbulent, non-swirled,
bluff body stabilized “M” flames for different hydrogen and methane blends including pure …
bluff body stabilized “M” flames for different hydrogen and methane blends including pure …
[HTML][HTML] The influence of hydrogen on the stability of a perfectly premixed combustor
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 …
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
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 …
is examined for two injection schemes. The response of the flames submitted to harmonic …
[HTML][HTML] Impact of H2-enrichment on the response of a partially premixed CH4–air flame to velocity and equivalence ratio fluctuations
The dynamics of hydrogen-enriched partially premixed methane–air flames are investigated,
focusing on the frequency response to velocity and equivalence ratio fluctuations. Large …
focusing on the frequency response to velocity and equivalence ratio fluctuations. Large …
[HTML][HTML] Tailoring the gain and phase of the flame transfer function through targeted convective-acoustic interference
This paper investigates how targeted interference between two well characterized sources
of hydrodynamic disturbances can modify the response of premixed bluff body stabilised H …
of hydrodynamic disturbances can modify the response of premixed bluff body stabilised H …
[HTML][HTML] Measuring acoustic transfer matrices of high-pressure hydrogen/air flames for aircraft propulsion
A Faure-Beaulieu, B Dharmaputra, B Schuermans… - Combustion and …, 2024 - Elsevier
Destructive thermoacoustic instabilities may potentially slow down significantly the ongoing
development of hydrogen combustors for decarbonizing aviation. Their early prediction …
development of hydrogen combustors for decarbonizing aviation. Their early prediction …
Investigation of flame and flow response in the swirler with different divergence cups and central body under external excitation
Y Yang, G Wang, H Wu, Z Zhu, C Ma, J Li - Physics of Fluids, 2023 - pubs.aip.org
Effects of swirl divergence cup and the central bluff body on premixed flame response with
external excitation are experimentally investigated. Flame transfer functions (FTFs) …
external excitation are experimentally investigated. Flame transfer functions (FTFs) …
Incompressible versus compressible large eddy simulation for the identification of premixed flame dynamics
The present work compares the respective advantages and disadvantages of compressible
and incompressible computational fluid dynamics (CFD) formulations when used for the …
and incompressible computational fluid dynamics (CFD) formulations when used for the …
Nonlinear response of a premixed low-swirl flame to acoustic excitation with large amplitude
W Liu, R Xue, L Zhang, Q Yang, H Wang - Combustion and Flame, 2022 - Elsevier
This paper describes an experimental investigation of the nonlinear response of a premixed
methane/air low-swirl flame to imposed acoustic excitation with perturbation amplitude up to …
methane/air low-swirl flame to imposed acoustic excitation with perturbation amplitude up to …