Chemiluminescence signature of premixed ammonia-methane-air flames

X Zhu, AA Khateeb, WL Roberts, TF Guiberti - Combustion and Flame, 2021 - Elsevier
This paper reports on the chemiluminescence footprint of premixed ammonia-methane-air
flames. The chemiluminescence spectrum of laminar twin-flames stabilized with a …

Thermoacoustic instability as mutual synchronization between the acoustic field of the confinement and turbulent reactive flow

SA Pawar, A Seshadri, VR Unni… - Journal of Fluid …, 2017 - cambridge.org
Thermoacoustic instability is the result of a positive coupling between the acoustic field in
the duct and the heat release rate fluctuations from the flame. Recently, in several turbulent …

Pre-chamber ignition mechanism: Experiments and simulations on turbulent jet flame structure

PM Allison, M De Oliveira, A Giusti, E Mastorakos - Fuel, 2018 - Elsevier
This work investigates the effects of premixed combustion kinematics in pre-chamber
volumes on the development of emitted hot jets from the igniter. The effects of fuel type …

Onset of thermoacoustic instability in turbulent combustors: an emergence of synchronized periodicity through formation of chimera-like states

S Mondal, VR Unni, RI Sujith - Journal of Fluid Mechanics, 2017 - cambridge.org
Thermoacoustic systems with a turbulent reactive flow, prevalent in the fields of power and
propulsion, are highly susceptible to oscillatory instabilities. Recent studies showed that …

MILD combustion of methane in a model combustor with an inverse-diffusion flame configuration

Y Tu, H Liu, Y Zhu, TF Guiberti, WL Roberts - Fuel, 2022 - Elsevier
MILD (moderate or intense low-oxygen dilution) combustion is a promising technology for
mitigating NOx emission from fuel combustion, but the combustion stability becomes an …

Combustion and emission characteristics of NH3/CH4/air in a model swirl combustor: Comparison between premixed and non-premixed modes

Y Tu, S Xu, H Liu - International Journal of Hydrogen Energy, 2023 - Elsevier
Ammonia (NH 3) is a promising hydrogen carrier and can be used as carbon-free alternative
fuel. However, NH 3 combustion faces critical challenges, such as narrower flammability …

Flame Dynamics in the Combustion Chamber of Hybrid Rocket Using Multiangle Chemiluminescence

J Luo, Z Zhang, X Lin, Z Wang, W Kun, G Zhou… - Journal of Propulsion …, 2023 - arc.aiaa.org
The flame dynamics in the combustion chamber of a hybrid rocket motor were visualized
using novel chemiluminescence imaging. A multidirectional visualization system employing …

Characteristics of turbulent flames in a confined and pressurised jet-in-hot-coflow combustor

DB Proud, MJ Evans, QN Chan, PR Medwell - Journal of the Energy …, 2022 - Elsevier
Combustion in hot and low oxygen environments—such as those encountered in practical
devices including inter-turbine burners and sequential gas turbines—is not yet fully …

Explosive synchronization in a turbulent reactive flow system

A Joseph, I Pavithran, RI Sujith - Chaos: An Interdisciplinary Journal of …, 2024 - pubs.aip.org
The occurrence of abrupt dynamical transitions in the macroscopic state of a system has
received growing attention. We present experimental evidence for abrupt transition via …

Experimental visualization of hybrid combustion: results at elevated pressures

ET Jens, AC Karp, VA Miller, GS Hubbard… - Journal of Propulsion …, 2020 - arc.aiaa.org
This work was undertaken in an effort to improve the understanding of the combustion
processes inside classical and fast-burning hybrid rocket motors. In this paper, a combustion …