Synergistic interactions of thermodiffusive instabilities and turbulence in lean hydrogen flames
Interactions of thermodiffusive instabilities and turbulence have been investigated by large-
scale Direct Numerical Simulations (DNS) in this work. Two DNS of turbulent premixed lean …
scale Direct Numerical Simulations (DNS) in this work. Two DNS of turbulent premixed lean …
Intrinsic instabilities in premixed hydrogen flames: Parametric variation of pressure, equivalence ratio, and temperature. part 1-dispersion relations in the linear regime
The impact of intrinsic combustion instabilities is studied for lean premixed hydrogen flames
by means of a series of simulations at different equivalence ratios [0.4-1.0], unburned …
by means of a series of simulations at different equivalence ratios [0.4-1.0], unburned …
Diffusive effects of hydrogen on pressurized lean turbulent hydrogen-air premixed flames
To understand the turbulence-chemistry interaction of lean hydrogen-air premixed flames at
elevated pressures, we conduct a series of high-fidelity direct numerical simulations with …
elevated pressures, we conduct a series of high-fidelity direct numerical simulations with …
Thermodiffusively unstable laminar hydrogen flame in a sufficiently large 3D computational domain–Part I: Characteristic patterns
Thermodiffusive instabilities can have a leading order effect on flame propagation for lean
premixed hydrogen flames. Many simulation studies have been performed to study this …
premixed hydrogen flames. Many simulation studies have been performed to study this …
Effects of differential diffusion on hydrogen flame kernel development under engine conditions
The early flame kernel development in spark ignition engines is crucial for engine
performance. For non-unity-Lewis-number mixtures, it can be significantly influenced by …
performance. For non-unity-Lewis-number mixtures, it can be significantly influenced by …
Identification of the extinction mechanism of lean limit hydrogen flames based on Lewis number effect
The conventional flame stretch analysis showed some technical limitations in describing the
observed extinction mechanism without considering the heat transfer characteristics related …
observed extinction mechanism without considering the heat transfer characteristics related …
Effects of turbulence on variations in early development of hydrogen and iso-octane flame kernels under engine conditions
The understanding and prediction of the early development of flame kernels are of high
practical importance for the robust relight of aviation gas turbines and the control of cycle-to …
practical importance for the robust relight of aviation gas turbines and the control of cycle-to …
The effect of thermal diffusion on stabilization of premixed flames
Soret or thermal diffusion is known to impact combustion mixtures by diffusion of species
along a temperature gradient. In this numerical modelling study we show that Soret diffusion …
along a temperature gradient. In this numerical modelling study we show that Soret diffusion …
Thermal diffusion, exhaust gas recirculation and blending effects on lean premixed hydrogen flames
Thermodiffusively-unstable lean premixed hydrogen flames are investigated using two-
dimensional direct numerical simulation employing finite-rate chemical kinetics. Three …
dimensional direct numerical simulation employing finite-rate chemical kinetics. Three …
Effects of dilatation and turbulence on tangential strain rates in premixed hydrogen and iso-octane flames
The tangential strain rate in premixed flames impacts significantly the flame surface area
generation and thus the combustion process. Studies on incompressible isotropic …
generation and thus the combustion process. Studies on incompressible isotropic …