Guillaume Vignat
Postdoctoral Scholar, Mechanical Engineering
Professional Education
-
Doctor of Philosophy, Unlisted School (2020)
-
Ingenieur, Centrale Supelec (2017)
-
PhD, University Paris-Saclay, CentraleSupelec, Reacting flows (2020)
All Publications
-
Analysis of weak secondary waves in a rotating detonation engine using large-eddy simulation and wavenumber-domain filtering
COMBUSTION AND FLAME
2024; 263
View details for DOI 10.1016/j.combustflame.2024.113387
View details for Web of Science ID 001203659500001
-
Integrated experimental and computational analysis of porous media combustion by combining gas-phase synchrotron μCT, IR-imaging, and pore-resolved simulations
COMBUSTION AND FLAME
2024; 259
View details for DOI 10.1016/j.combustflame.2023.113132
View details for Web of Science ID 001106259400001
-
Experiment and modeling of stochastic ignition and combustion of fuel droplets impacting a hot surface
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2024; 40 (1-4)
View details for DOI 10.1016/j.proci.2024.105747
View details for Web of Science ID 001313236000001
-
Experimental demonstration of a two-stage porous media burner for low-emission ammonia combustion
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2024; 40 (1-4)
View details for DOI 10.1016/j.proci.2024.105491
View details for Web of Science ID 001297652000001
-
Coupling of detonation structure and upstream inhomogeneities in a rotating detonation engine
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2024; 40 (1-4)
View details for DOI 10.1016/j.proci.2024.105576
View details for Web of Science ID 001278362400001
-
A versatile pressure-cell design for studying ultrafast molecular-dynamics in supercritical fluids using coherent multi-pulse x-ray scattering.
The Review of scientific instruments
2024; 95 (1)
Abstract
Supercritical fluids (SCFs) can be found in a variety of environmental and industrial processes. They exhibit an anomalous thermodynamic behavior, which originates from their fluctuating heterogeneous micro-structure. Characterizing the dynamics of these fluids at high temperature and high pressure with nanometer spatial and picosecond temporal resolution has been very challenging. The advent of hard x-ray free electron lasers has enabled the development of novel multi-pulse ultrafast x-ray scattering techniques, such as x-ray photon correlation spectroscopy (XPCS) and x-ray pump x-ray probe (XPXP). These techniques offer new opportunities for resolving the ultrafast microscopic behavior in SCFs at unprecedented spatiotemporal resolution, unraveling the dynamics of their micro-structure. However, harnessing these capabilities requires a bespoke high-pressure and high-temperature sample system that is optimized to maximize signal intensity and address instrument-specific challenges, such as drift in beamline components, x-ray scattering background, and multi-x-ray-beam overlap. We present a pressure cell compatible with a wide range of SCFs with built-in optical access for XPCS and XPXP and discuss critical aspects of the pressure cell design, with a particular focus on the design optimization for XPCS.
View details for DOI 10.1063/5.0158497
View details for PubMedID 38170817
-
Improving volume-averaged simulations of matrix-stabilized combustion through direct X-ray μCT characterization: Application to NH<sub>3 </sub>/H<sub>2</sub>-air combustion
COMBUSTION AND FLAME
2023; 257
View details for DOI 10.1016/j.combustflame.2023.113020
View details for Web of Science ID 001077127800001
-
Combustion of lean ammonia-hydrogen fuel blends in a porous media burner
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2023; 39 (4): 4195-4204
View details for DOI 10.1016/j.proci.2022.07.054
View details for Web of Science ID 001018624900001
-
Swirling spray flames dynamical blow out induced by transverse acoustic oscillations
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2023; 39 (4): 4651-4659
View details for DOI 10.1016/j.proci.2022.08.029
View details for Web of Science ID 001021009300001
-
Experimental and numerical investigation of flame stabilization and pollutant formation in matrix stabilized ammonia-hydrogen combustion
COMBUSTION AND FLAME
2023; 250
View details for DOI 10.1016/j.combustflame.2023.112642
View details for Web of Science ID 000945070400001
-
Dynamics and structure of detonations in stratified product-gas diluted mixtures
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2023; 39 (3): 2855-2864
View details for DOI 10.1016/j.proci.2022.07.173
View details for Web of Science ID 001017579200001
-
Comparison of Flame Describing Functions Measured in Single and Multiple Injector Configurations
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2022; 144 (11)
View details for DOI 10.1115/1.4055451
View details for Web of Science ID 000883168700009
-
Do flame describing functions suitably represent combustion dynamics under self-sustained oscillations?
JOURNAL OF SOUND AND VIBRATION
2022; 534
View details for DOI 10.1016/j.jsv.2022.117034
View details for Web of Science ID 000813339100002
-
p Swirler effects on combustion instabilities analyzed with measured FDFs, injector impedances and damping rates
COMBUSTION AND FLAME
2022; 238
View details for DOI 10.1016/j.combustflame.2021.111947
View details for Web of Science ID 000745063300001
-
The suitability of different swirl number definitions for describing swirl flows: Accurate, common and (over-) simplified formulations
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
2022; 89
View details for DOI 10.1016/j.pecs.2021.100969
View details for Web of Science ID 000739484300001
-
A Joint Experimental and Large Eddy Simulation Characterization of the Liquid Fuel Spray in a Swirl Injector
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2021; 143 (8)
View details for DOI 10.1115/1.4049771
View details for Web of Science ID 000680416800023
-
Improvement of lean blow out performance of spray and premixed swirled flames using nanosecond repetitively pulsed discharges
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2021; 38 (4): 6559-6566
View details for DOI 10.1016/j.proci.2020.06.136
View details for Web of Science ID 000640405500011
-
Investigation of transient PVC dynamics in a strongly swirled spray flame using high speed planar laser imaging of SnO2 microparticles
COMBUSTION AND FLAME
2021; 225: 305-319
View details for DOI 10.1016/j.combustflame.2020.11.009
View details for Web of Science ID 000614036500002
-
Effect of Different Fuels on Combustion Instabilities in an Annular Combustor
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2021; 143 (3)
View details for DOI 10.1115/1.4049702
View details for Web of Science ID 000626499800017
-
Large-Eddy Simulation of Flame Dynamics During the Ignition of a Swirling Injector Unit and Comparison With Experiments
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2021; 143 (2)
View details for DOI 10.1115/1.4049297
View details for Web of Science ID 000617335900002
-
Combustion Dynamics of Annular Systems
COMBUSTION SCIENCE AND TECHNOLOGY
2020; 192 (7): 1358-1388
View details for DOI 10.1080/00102202.2020.1734583
View details for Web of Science ID 000519517100001
-
Dynamics of spray and swirling flame under acoustic oscillations : A joint experimental and LES investigation
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2020; 38 (4): 6015-6024
View details for DOI 10.1016/j.proci.2020.05.054
View details for Web of Science ID 000640387700020
-
High Amplitude Combustion Instabilities in an Annular Combustor Inducing Pressure Field Deformation and Flame Blow Off
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2020; 142 (1)
View details for DOI 10.1115/1.4045515
View details for Web of Science ID 000525413900016
-
Flame and Spray Dynamics During the Light-Round Process in an Annular System Equipped With Multiple Swirl Spray Injectors
JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME
2019; 141 (6)
View details for DOI 10.1115/1.4042024
View details for Web of Science ID 000468915800008
-
HIGH AMPLITUDE COMBUSTION INSTABILITIES IN AN ANNULAR COMBUSTOR INDUCING PRESSURE FIELD DEFORMATION AND FLAME BLOW-OFF
AMER SOC MECHANICAL ENGINEERS. 2019
View details for Web of Science ID 000502163800044
-
An experimental study into the effect of injector pressure loss on self-sustained combustion instabilities in a swirled spray burner
PROCEEDINGS OF THE COMBUSTION INSTITUTE
2019; 37 (4): 5205-5213
View details for DOI 10.1016/j.proci.2018.06.125
View details for Web of Science ID 000457095600100
-
FLAME AND SPRAY DYNAMICS DURING THE LIGHT-ROUND PROCESS IN AN ANNULAR SYSTEM EQUIPPED WITH MULTIPLE SWIRL SPRAY INJECTORS
AMER SOC MECHANICAL ENGINEERS. 2018
View details for Web of Science ID 000456494200037
-
ANALYSIS OF PERFORMANCE SENSITIVITY TO GEOMETRICAL VARIATIONS OF A MODERN HELICOPTER ENGINE COMBUSTOR USING LES SIMULATIONS
AMER SOC MECHANICAL ENGINEERS. 2017
View details for Web of Science ID 000412782400003