A5071577644- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- Fluid Dynamics and Heat Transfer
- Combustion and Detonation Processes
- Rocket and propulsion systems research
- Fluid Dynamics and Turbulent Flows
- Fire dynamics and safety research
- Heat transfer and supercritical fluids
- Wind and Air Flow Studies
- Plant Surface Properties and Treatments
- Computational Fluid Dynamics and Aerodynamics
- Coal Combustion and Slurry Processing
- Aerodynamics and Acoustics in Jet Flows
- Plasma Applications and Diagnostics
- Electrohydrodynamics and Fluid Dynamics
- Diffusion and Search Dynamics
- Reliability and Maintenance Optimization
- Laser-induced spectroscopy and plasma
- Silicon Carbide Semiconductor Technologies
- Aerodynamics and Fluid Dynamics Research
- Acoustic Wave Phenomena Research
- Laser Design and Applications
- Vehicle Noise and Vibration Control
- French Urban and Social Studies
- Wireless Sensor Networks for Data Analysis
Laboratoire d'Énergétique Moléculaire et Macroscopique, Combustion
2016-2025
CentraleSupélec
2016-2025
Université Paris-Saclay
2019-2024
Centre National de la Recherche Scientifique
2014-2024
Laboratoire de Physique de l'ENS de Lyon
2020
École Normale Supérieure de Lyon
2020
Keio University
2018
Centre Hospitalier Universitaire de Besançon
2018
Laboratoire de l'Intégration du Matériau au Système
2016-2018
Japan Aerospace Exploration Agency
2017-2018
Combustion instabilities in annular systems raise fundamental issues that are also of practical importance to aircraft engines and ground-based gas turbine combustors. Recent studies indicate the injector plays a significant role stability combustors by defining flame dynamical response setting inlet impedance system. The present investigation examines effects combinations injectors two different types ( $U$ $S$ ) on thermoacoustic laboratory-scale combustor compares circumferential staging...
Abstract This article reports experiments carried out in the laboratory scale annular combustor MICCA-spray equipped with multiple swirling spray injectors. The experimental setup consists an air plenum connected to a combustion chamber formed by two concentric cylindrical quartz tubes, allowing full optical access flames. A new injection system is introduced and characterized. For wide range of operating conditions, strong instabilities are observed, but focus this placed on very high...
Combustion instability analysis in annular systems often relies on reduced-order models that represent the complexity of combustion dynamics a framework which flame is represented by ‘flame describing function’ (FDF), portraying its heat release rate response to acoustic disturbances. However, most cases, FDFs are only available for limited range disturbance amplitudes, complicating description saturation process at high oscillation levels leading establishment limit cycle. This article...
One important aspect in the analysis of combustion instabilities multiple-injector annular systems is that representing such oscillations with a linear array injectors. This issue considered present work by comparing flame dynamics self-sustained situation configuration MICCA-Spray, experiments carried out TACC-Spray, rectangular combustor equipped five injectors externally modulated driver units. In system, coupling mode azimuthal, and array, flames are submitted to transverse acoustic...
The determination of acoustic source terms and growth rates is paramount importance in the thermoacoustic stability analysis combustion systems. This article aims to experimentally quantify energy term laboratory-scale annular combustor MICCA-Spray deduce rate estimates from these measurements. equipped with sixteen modular injection units an original method used vary level self-sustained pressure oscillations at limit cycle system by mixing injectors leading different flame dynamics,...
A staged injector developed by JAXA and fueled with kerosene is studied in a high-pressure combustion experiment. With stable pilot fuel flow rate, the rate main stage progressively increased. high-speed OH-planar laser-induced fluorescence (PLIF) system used to record flame motion at 10,000 fps. In beginning of recording, behavior dominated relatively low-frequency rotation due swirling flow. These rotational motions then coexist thermo-acoustic instability around 475 Hz which increases...
Abstract Combustion instability in annular combustors of jet engines is a recurring issue. In this study, the characteristics instabilities for different fuels are investigated by combining maps obtained laboratory-scale combustor equipped with multiple swirling spray injectors (MICCA-spray) and flame describing functions (FDFs) from single sector configuration (SICCA-spray). Two types liquid injected as hollow cone sprays: heptane, which fairly volatile, dodecane, less volatile. Experiments...
Abstract Hydrogen-fueled carbon-free energy is a growing prospect for the future of several industries, including aeronautical and generation sectors. However, transition to hydrogen comes with challenges: flame stabilization due unique combustion properties compared conventional fuels control nitrogen oxides (NOx) production higher temperature. In addition, high flammability poses an increased risk flashback in premixed configurations commonly used generate low-NOx flames. As consequence,...
Abstract The quality of liquid fuel spray injection determines to a large extent the performance aero-engine combustors. This investigation focuses on detailed characterization in test rig targeted at applications. is injected as hollow cone by simplex atomizer and injector comprises radial swirler. Two features droplet distribution are less commonly found. First, distributions diameters exhibit nonaxisymmetric patterns, which investigated for three types swirlers. Second, it found that...