Professional Education


  • Doctor of Philosophy, Unlisted School (2020)
  • Ingenieur, Centrale Supelec (2017)
  • PhD, University Paris-Saclay, CentraleSupelec, Reacting flows (2020)

Stanford Advisors


All Publications


  • Analysis of weak secondary waves in a rotating detonation engine using large-eddy simulation and wavenumber-domain filtering COMBUSTION AND FLAME Vignat, G., Brouzet, D., Bonanni, M., Ihme, M. 2024; 263
  • Integrated experimental and computational analysis of porous media combustion by combining gas-phase synchrotron μCT, IR-imaging, and pore-resolved simulations COMBUSTION AND FLAME Boigne, E., Zirwes, T., Parkinson, D. Y., Vignat, G., Muhunthan, P., Barnard, H. S., MacDowell, A. A., Ihme, M. 2024; 259
  • Experiment and modeling of stochastic ignition and combustion of fuel droplets impacting a hot surface PROCEEDINGS OF THE COMBUSTION INSTITUTE Ly, N., Ma, Y., Vignat, G., Hashimoto, N., Ihme, M. 2024; 40 (1-4)
  • Experimental demonstration of a two-stage porous media burner for low-emission ammonia combustion PROCEEDINGS OF THE COMBUSTION INSTITUTE Vignat, G., Zirwes, T., Boigne, E., Ihme, M. 2024; 40 (1-4)
  • Coupling of detonation structure and upstream inhomogeneities in a rotating detonation engine PROCEEDINGS OF THE COMBUSTION INSTITUTE Bonanni, M., Brouzet, D., Vignat, G., Ihme, M. 2024; 40 (1-4)
  • 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 Muhunthan, P., Li, H., Vignat, G., Toro, E. R., Younes, K., Sun, Y., Sokaras, D., Weiss, T., Rajkovic, I., Osaka, T., Inoue, I., Song, S., Sato, T., Zhu, D., Fulton, J. L., Ihme, M. 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 Zirwes, T., Vignat, G., Toro, E. R., Boigne, E., Younes, K., Trimis, D., Ihme, M. 2023; 257
  • Combustion of lean ammonia-hydrogen fuel blends in a porous media burner PROCEEDINGS OF THE COMBUSTION INSTITUTE Vignat, G., Akoush, B., Toro, E. R., Boigne, E., Ihme, M. 2023; 39 (4): 4195-4204
  • Swirling spray flames dynamical blow out induced by transverse acoustic oscillations PROCEEDINGS OF THE COMBUSTION INSTITUTE Patat, C., Baillot, F., Blaisot, J., Domingues, E., Vignat, G., Soundararajan, P., Renaud, A., Durox, D., Candel, S. 2023; 39 (4): 4651-4659
  • Experimental and numerical investigation of flame stabilization and pollutant formation in matrix stabilized ammonia-hydrogen combustion COMBUSTION AND FLAME Vignat, G., Zirwes, T., Toro, E. R., Younes, K., Boigne, E., Muhunthan, P., Simitz, L., Trimis, D., Ihme, M. 2023; 250
  • Dynamics and structure of detonations in stratified product-gas diluted mixtures PROCEEDINGS OF THE COMBUSTION INSTITUTE Brouzet, D., Vignat, G., Ihme, M. 2023; 39 (3): 2855-2864
  • Comparison of Flame Describing Functions Measured in Single and Multiple Injector Configurations JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME Soundararajan, P., Durox, D., Vignat, G., Renaud, A., Beaunier, J., Candel, S. 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 Soundararajan, P., Vignat, G., Durox, D., Renaud, A., Candel, S. 2022; 534
  • p Swirler effects on combustion instabilities analyzed with measured FDFs, injector impedances and damping rates COMBUSTION AND FLAME Soundararajan, P., Durox, D., Renaud, A., Vignat, G., Candel, S. 2022; 238
  • The suitability of different swirl number definitions for describing swirl flows: Accurate, common and (over-) simplified formulations PROGRESS IN ENERGY AND COMBUSTION SCIENCE Vignat, G., Durox, D., Candel, S. 2022; 89
  • 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 Vignat, G., Rajendram Soundararajan, P., Durox, D., Vie, A., Renaud, A., Candel, S. 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 Vignat, G., Minesi, N., Soundararajan, P., Durox, D., Renaud, A., Blanchard, V., Laux, C. O., Candel, S. 2021; 38 (4): 6559-6566
  • Investigation of transient PVC dynamics in a strongly swirled spray flame using high speed planar laser imaging of SnO2 microparticles COMBUSTION AND FLAME Vignat, G., Durox, D., Renaud, A., Lancien, T., Vicquelin, R., Candel, S. 2021; 225: 305-319
  • Effect of Different Fuels on Combustion Instabilities in an Annular Combustor JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME Soundararajan, P., Vignat, G., Durox, D., Renaud, A., Candel, S. 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 Topperwien, K., Collin-Bastiani, F., Riber, E., Cuenot, B., Vignat, G., Prieur, K., Durox, D., Candel, S., Vicquelin, R. 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 Vignat, G., Durox, D., Schuller, T., Candel, S. 2020; 192 (7): 1358-1388
  • Dynamics of spray and swirling flame under acoustic oscillations : A joint experimental and LES investigation PROCEEDINGS OF THE COMBUSTION INSTITUTE Vignat, G., Lo Schiavo, E., Laera, D., Renaud, A., Gicquel, L., Durox, D., Candel, S. 2020; 38 (4): 6015-6024
  • 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 Vignat, G., Durox, D., Renaud, A., Candel, S. 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 Prieur, K., Vignat, G., Durox, D., Schuller, T., Candel, S. 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 Vignat, G., Durox, D., Renaud, A., Candel, S., ASME AMER SOC MECHANICAL ENGINEERS. 2019
  • 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 Vignat, G., Durox, D., Prieur, K., Candel, S. 2019; 37 (4): 5205-5213
  • FLAME AND SPRAY DYNAMICS DURING THE LIGHT-ROUND PROCESS IN AN ANNULAR SYSTEM EQUIPPED WITH MULTIPLE SWIRL SPRAY INJECTORS Prieur, K., Durox, D., Vignat, G., Schuller, T., Candel, S., ASME AMER SOC MECHANICAL ENGINEERS. 2018
  • ANALYSIS OF PERFORMANCE SENSITIVITY TO GEOMETRICAL VARIATIONS OF A MODERN HELICOPTER ENGINE COMBUSTOR USING LES SIMULATIONS Vignat, G., Taliercio, G., Lamouroux, J., Da Veiga, S., Savary, N., Duchaine, P., ASME AMER SOC MECHANICAL ENGINEERS. 2017