Physical and chemical features of hydrogen combustion and their influence on the characteristics of gas turbine combustion chambers
EA Shchepakina, IA Zubrilin, AY Kuznetsov… - Applied Sciences, 2023 - mdpi.com
Hydrogen plays a key role in the transition to a carbon-free economy. Substitution of
hydrocarbon fuel with hydrogen in gas turbine engines and power plants is an area of …
hydrocarbon fuel with hydrogen in gas turbine engines and power plants is an area of …
[HTML][HTML] Intrinsic instabilities of hydrogen and hydrogen/ammonia premixed flames: Influence of equivalence ratio, fuel composition and pressure
Premixed lean hydrogen-air flames exhibit instabilities due to hydrodynamic instabilities but
also thermo-diffusive instabilities. However, in the case of ammonia/hydrogen blends, the …
also thermo-diffusive instabilities. However, in the case of ammonia/hydrogen blends, the …
[HTML][HTML] Thermodiffusively-unstable lean premixed hydrogen flames: Phenomenology, empirical modelling, and thermal leading points
Thermodiffusively-unstable lean premixed hydrogen flames are investigated using three-
dimensional direct numerical simulation with finite-rate chemical kinetics. A large number of …
dimensional direct numerical simulation with finite-rate chemical kinetics. A large number of …
Turbulent flame speed of NH3/CH4/H2/H2O/air-mixtures: Effects of elevated pressure and Lewis number
This study investigated the turbulent flame speed (ST) of NH 3/CH 4/H 2/air mixtures
subjected to differential-diffusion effect characterized by sub-unity Lewis number (Le) at …
subjected to differential-diffusion effect characterized by sub-unity Lewis number (Le) at …
Assessing the importance of differential diffusion in stratified hydrogen–methane flames using extended flamelet tabulation approaches
Taking into account detailed chemical kinetics and therefore allowing for a detailed
representation of the flame's microstructure at reduced computational cost make flamelet …
representation of the flame's microstructure at reduced computational cost make flamelet …
Simple criterion of importance of laminar flame instabilities in premixed turbulent combustion of mixtures characterized by low Lewis numbers
J Chomiak, AN Lipatnikov - Physical Review E, 2023 - APS
By (i) highlighting the mitigation effect of strain rates on laminar flame instabilities and (ii)
comparing peak growth rates of laminar flame instabilities with strain rates generated by …
comparing peak growth rates of laminar flame instabilities with strain rates generated by …
Combustion mechanism of ammonia and ammonia-hydrogen mixtures in the intensely turbulent jet mixing layer under the spontaneous ignition condition
Y Kang, X Xu, L Tan, X Huang, Y Zhang, T Zeng… - International Journal of …, 2024 - Elsevier
The higher-order DNS simulations were carried out to study the turbulent jet combustion
characteristics of pure ammonia and ammonia-hydrogen mixtures at the auto-ignition …
characteristics of pure ammonia and ammonia-hydrogen mixtures at the auto-ignition …
Transition from turbulence-dominated to instability-dominated combustion regime in lean hydrogen-air flames
To explore the importance of thermodiffusive and hydrodynamic instabilities of laminar
flames in turbulent flows, previously generated direct numerical simulations of statistically …
flames in turbulent flows, previously generated direct numerical simulations of statistically …
A numerical investigation on effects of hydrogen enrichment and turbulence on NO formation pathways in premixed ammonia/air flames
ABSTRACT NO x emission reduction is one of the major challenges when using
ammonia/hydrogen blends as an alternative fuel for carbon-free combustion. In this study …
ammonia/hydrogen blends as an alternative fuel for carbon-free combustion. In this study …
[HTML][HTML] Large eddy simulation of a supersonic lifted hydrogen flame: Impacts of Lewis, turbulent Schmidt and Prandtl numbers
Parametric large eddy simulations (LES) of a supersonic lifted hydrogen flame are reported.
The emphases are on two aspects: impacts of (1) Lewis number (Le i of the ith species) and …
The emphases are on two aspects: impacts of (1) Lewis number (Le i of the ith species) and …