Recent developments in DNS of turbulent combustion

P Domingo, L Vervisch - Proceedings of the Combustion Institute, 2023 - Elsevier
The simulation of turbulent flames fully resolving the smallest flow scales and the thinnest
reaction zones goes along with specific requirements, which are discussed from …

Turbulent flame speed of NH3/CH4/H2/H2O/air-mixtures: Effects of elevated pressure and Lewis number

S Wang, AM Elbaz, G Wang, Z Wang, WL Roberts - Combustion and Flame, 2023 - Elsevier
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 …

Turbulent flame speed measurement of NH3/H2/air and CH4/air flames and a numerical case study of NO emission in a constant volume combustion chamber (CVCC …

S Wang, AM Elbaz, OZ Arab, WL Roberts - Fuel, 2023 - Elsevier
Ammonia combustion is a meaningful method to retrieve stored amounts of excess variable
renewable energy. The practical combustors like engines and gas turbines fired by the …

Lewis number and preferential diffusion effects in lean hydrogen–air highly turbulent flames

HC Lee, P Dai, M Wan, AN Lipatnikov - Physics of Fluids, 2022 - pubs.aip.org
Unsteady three-dimensional direct numerical simulations of highly turbulent, complex-
chemistry, lean hydrogen-air flames were performed by changing the equivalence ratio ϕ⁠ …

Experimental study of the influence of Lewis number, laminar flame thickness, temperature, and pressure on turbulent flame speed using hydrogen and methane fuels

HY Hsieh, SM Mousavi, AN Lipatnikov… - Proceedings of the …, 2024 - Elsevier
To experimentally explore the influence of Lewis number L e, laminar flame thickness δ L,
pressure P, and unburned gas temperature T u on turbulent flame speed ST, a set of …

An experimental study of the influence of Lewis number on turbulent flame speed at different pressures

AN Lipatnikov, YR Chen, SS Shy - Proceedings of the Combustion Institute, 2023 - Elsevier
To explore effects of pressure on the magnitude of the influence of differences in molecular
transport coefficients on turbulent flame speed ST, experiments with statistically spherical …

A priori DNS study of applicability of flamelet concept to predicting mean concentrations of species in turbulent premixed flames at various Karlovitz numbers

AN Lipatnikov, VA Sabelnikov… - Combustion and …, 2020 - Elsevier
Complex-chemistry direct numerical simulation (DNS) data obtained earlier from lean
hydrogen-air flames associated with corrugated flame (case A), thin reaction zone (case B) …

Predictive models for flame evolution using machine learning: A priori assessment in turbulent flames without and with mean shear

J Ren, H Wang, G Chen, K Luo, J Fan - Physics of Fluids, 2021 - pubs.aip.org
Accurate prediction of temporal evolution of turbulent flames represents one of the most
challenging problems in the combustion community. In this work, predictive models for …

[HTML][HTML] Assessment of a flamelet approach to evaluating mean species mass fractions in moderately and highly turbulent premixed flames

AN Lipatnikov, T Nilsson, R Yu, XS Bai… - Physics of …, 2021 - pubs.aip.org
Complex-chemistry direct numerical simulation (DNS) data obtained from lean methane-air
turbulent flames are analyzed to perform a priori assessment of predictive capabilities of the …

Turbulent burning velocity of hydrogen/n-heptane/air propagating spherical flames: Effects of hydrogen content

H Dai, J Wang, S Su, L Su, X Cai, Z Huang - Combustion and Flame, 2024 - Elsevier
This study investigated the flame propagation and turbulent burning velocity of hydrogen/n-
heptane/air mixtures subjected to differential diffusion and flame stretch induced by …