Large eddy simulation of the dynamics of lean premixed flames using global reaction mechanisms calibrated for CH4–H2 fuel blends

AM Garcia, S Le Bras, J Prager, M Häringer… - Physics of …, 2022 - pubs.aip.org
The effects of hydrogen addition on the flame dynamics of a bluff-body stabilized methane–
hydrogen turbulent flame are studied with large eddy simulation (LES). The LES is carried …

Numerical investigation of wall effects on combustion noise from a lean-premixed hydrogen/air low-swirl flame

J Nagao, AL Pillai, T Shoji, S Tachibana, T Yokomori… - Physics of …, 2023 - pubs.aip.org
A hybrid computational fluid dynamics (CFD)/computational aero-acoustics (CAA) approach,
in which large-eddy simulation (LES) and APE-RF (solution of the acoustic perturbation …

Control of intrinsic thermoacoustic instabilities using hydrogen fuel

A Ghani, W Polifke - Proceedings of the Combustion Institute, 2021 - Elsevier
This conceptual numerical study explores a possible strategy for control of unstable intrinsic
thermoacoustic (ITA) modes. Control of the ITA feedback loop has not been discussed yet …

Analysis of the flame dynamics in methane/hydrogen fuel blends at elevated pressures

M Casel, A Ghani - Proceedings of the Combustion Institute, 2023 - Elsevier
Abstract We investigate the Flame Transfer Function (FTF) of a lean-premixed, laminar slit
flame numerically. Based on the reference case at atmospheric pressure, we investigate four …

The impact of chemical modelling on turbulent premixed flame acoustics

D Brouzet, M Talei, MJ Brear, B Cuenot - Journal of Fluid Mechanics, 2021 - cambridge.org
Direct numerical simulations are used to study the impact of chemical modelling on the
flame dynamics and the sound generated by three-dimensional, turbulent, premixed …

An exceptional point switches stability of a thermoacoustic experiment

A Ghani, W Polifke - Journal of Fluid Mechanics, 2021 - cambridge.org
We identify an exceptional point in the numerical stability map of a combustion experiment
operated with laminar premixed flames. A low-order model of the experiment allows one to …

Data-driven identification of nonlinear flame models

A Ghani, I Boxx, C Noren - … of Engineering for …, 2020 - asmedigitalcollection.asme.org
This paper presents a data-driven identification framework with the objective to retrieve a
flame model from the nonlinear limit cycle. The motivation is to identify a flame model for …

Impact of symmetry breaking on the Flame Transfer Function of a laminar premixed flame

TL Kaiser, G Öztarlik, L Selle, T Poinsot - Proceedings of the Combustion …, 2019 - Elsevier
This work presents a numerical study of the acoustic response of a laminar flame with
tunable asymmetry. A V-shaped premixed flame is stabilised in the wake of a cylindrical …

[HTML][HTML] Computational analysis of premixed methane-air flame interacting with a solid wall or a hydrogen porous wall

PS Salimath, IS Ertesvåg, A Gruber - Fuel, 2020 - Elsevier
The process of flame-wall interaction for premixed methane-air flames is investigated by
direct numerical simulation. The flames propagate towards an isothermal, chemically inert …

Dynamic loads induced by near-limit turbulent hydrogen-air combustion inside a confinement

K Alexey, M Ksenia, Y Ivan - Process Safety and Environmental Protection, 2024 - Elsevier
The paper is devoted to the analysis of the turbulent flame development inside a confined
vessel filled with the combustible gaseous mixture and related pressure build-up. Detailed …