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Research

I am associate professor at Ecole Centrale de Lyon in the Laboratoire de Mécanique des Fluides et Acoustique.
I belong to the Turbomachinery research department lead by Xavier Ottavy.

My research interests include Turbomachinery flows, combustion, acoustics and turbulence modeling using Large Eddy Simulation and Direct Numerical Simulation.

Focus on Dense Gas Turbulence Modeling

Dense gases, characterized by large molar masses and heat capacities are used in ORC (Organic Rankine Cycle) systems such as the one presented in the picture below. It is used to convert solar energy into electricity more efficiently.
To improve expanders and turbines efficiencies, manufacturers rely on Computational Fluid Dynamics (CFD) techniques such as Reynolds Average Navier-Stokes (RANS) or Large Eddy Simulation (LES). Yet, turbulence in dense gas flows remains to be understood and new turbulence closure models need to be developed beyond the perfect gas hypothesis

Beyond the perfect gas hypothesis

To analyze and model the peculiar behavior of turbulence in dense gas flows, the ANR project EDGES (project grant #ANR-17-CE06-0014-01) ran from 2018 to 2022. The team is now part of the European initiative AUFRANDE in collaboration with QUT (Australia)

Project EDGES involved Christophe Corre (Full Professor), Aurélien Vadrot (PhD), Paolo Errante (Postdoctoral Research Fellow) and Dominik Schuster (Postdoctoral Research Fellow)

Project AUFRANDE involves Christophe Corre (Full Professor) and Isa Helal (PhD)

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Using Machine learning to model turbulence and thermodynamics in dense gas flows

A database of more than 10 billion grid points has been gathered using the AVBP solver. Using HPC and Machine learning, the team is currently developing turbulence closure models for RANS and LES.

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What’s next?

Once the models developed, they will be validated against experimental results and transferred to the industry in order to enable a better optimization of renewable energy production systems that use dense gas flows.

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HdR (Habilitation à diriger des Recherches) Thesis

[HdR Thesis] Alexis Giauque. Modeling of turbulence and acoustics in complex compressible flows using Theory, Large Eddy Simulation and Machine Learning. HdR thesis, Lyon 1 University, 2024. (Link to the Video) (Link to the Manuscript)

Publications & Conferences

Turbomachinery Flows and Dense Gas Turbulence Modeling

Journal Articles

[A-1] Pierre Duquesne, Jérôme Dombard, Nicolas Poujol, and Alexis Giauque. An Open–Closed Flow Separation in a Compressor Radial Diffuser. ASME. J. Turbomach. 2024; 146(10): 101011. (Link)

[A-2] Alexis Giauque, Corentin Giguet, Aurélien Vadrot, and Christophe Corre. A priori test of Large-Eddy Simulation models for the Sub-Grid Scale turbulent stress tensor in perfect and transcritical compressible real gas Homogeneous Isotropic Turbulence. Computers & Fluids, Volume 268, 2024. (Link)

[A-3] Alexis Giauque, Dominik Schuster, and Christophe Corre; High-fidelity numerical investigation of a real gas annular cascade with experimental validation. Physics of Fluids, 2023; 35 (12): 126119. (Link)

[A-4] Alexis Giauque, Aurélien Vadrot, Paolo Errante, Christophe Corre; A priori analysis of subgrid-scale terms in compressible transcritical real gas flows. Physics of Fluids, 2021; 33 (8): 085126. (Link)

[A-5] Aurélien Vadrot, Alexis Giauque, and Christophe Corre. Direct numerical simulations of temporal compressible mixing layers in a Bethe–Zel’dovich–Thompson dense gas: influence of the convective Mach number. Journal of Fluid Mechanics. 2021;922:A5. (Link)

[A-6] Alexis Giauque, Aurélien Vadrot, Paolo Errante and Christophe Corre. Towards subgrid-scale turbulence modeling in dense gas flows. Proceedings of the 3rd International Seminar on Non-Ideal Compressible Fluid Dynamics for Propulsion and Power: NICFD 2020, pages 71-77. Springer International Publishing, 2020. (Link)

[A-7] Alexis Giauque, Christophe Corre, and Aurélien Vadrot. Direct numerical simulations of forced homogeneous isotropic turbulence in a dense gas. Journal of Turbulence, 21(3), 186-208, 2020. (Link)

[A-8] Aurélien Vadrot, Alexis Giauque, and Christophe Corre. Analysis of turbulence characteristics in a temporal dense gas compressible mixing layer using direct numerical simulation. Journal of Fluid Mechanics, 893(A10), 2020. (Link)

[A-9] Alexis Giauque, Christophe Corre, and Matteo Menghetti. Direct numerical simulations of homogeneous isotropic turbulence in a dense gas. In J Phys Conf Ser, volume 821, page 012017, 2017. (Link)

Conferences and Reports

[C-1] Dominik Schuster, Yusuf Ince, Alexis Giauque, and Christophe Corre. Assessment of Density and Compressibility Corrections for RANS Simulations of Real Gas Flows Using SU2. Proceedings of the 4th International Seminar on Non-Ideal Compressible Fluid Dynamics for Propulsion and Power. NICFD 2022. ERCOFTAC Series, vol 29. Springer, Cham. 2023 (Link)

[C-2] Alexis Giauque, Aurélien Vadrot, and Christophe Corre. Development, Validation and Application of an ANN-Based Large Eddy Simulation Subgrid-Scale Turbulence Model for Dense Gas Flows. Proceedings of the 4th International Seminar on Non-Ideal Compressible Fluid Dynamics for Propulsion and Power. NICFD 2022. ERCOFTAC Series, vol 29. Springer, Cham. 2023 (Link)

[C-3] Aurélien Vadrot, Alexis Giauque, and Christophe Corre. Investigation of turbulent dense gas flows with direct numerical simulation. In Congrès français de mécanique. AFM, Association Française de Mécanique, 2019. (Link)

[C-4] Alexis Giauque, Christophe Corre, and Aurélien Vadrot. Direct numerical simulation of turbulent dense gas flows. In International Seminar on Non-Ideal Compressible-Fluid Dynamics for Propulsion & Power, pages 76–87. Springer, Cham, 2018. (Link)

Combustion and Acoustics Modeling in Turbomachinery

Journal Articles

[A-10] Jean Al-Am, Alexis Giauque, Vincent Clair, Jérôme Boudet, and Fernando Gea-Aguilera. Direct-Noise of an Ultrahigh-Bypass-Ratio Turbofan: Periodic-Sector vs Full-Annulus Large-Eddy Simulations. AIAA Journal, 1-15. 2024 (Link)

[A-11] Jean Al-Am, Vincent Clair, Alexis Giauque, Jérôme Boudet, and Fernando Gea-Aguilera; Aeroacoustic analysis of the tip-leakage flow of an ultrahigh bypass ratio fan stage. Physics of Fluids 1 April 2023; 35 (4): 047104. (Link)

[A-12] Jean Al-Am, Vincent Clair, Alexis Giauque, Jérôme Boudet, and Fernando Gea-Aguilera. On the effects of a separation bubble on fan noise. Journal of Sound and Vibration, Volume 537, 2022. (Link)

[A-13] Jean Al-Am, Vincent Clair, Alexis Giauque, Jérôme Boudet, and Fernando Gea-Aguilera. 2021. “A Parametric Study on the LES Numerical Setup to Investigate Fan/OGV Broadband Noise” International Journal of Turbomachinery, Propulsion and Power 6, no. 2: 12. (Link)

[A-14] Jérôme Boudet and Alexis Giauque. Adaptation and evaluation of a weak recycling strategy for inflow boundary layers in large-eddy simulation. Computers & Fluids, page 104489, 2020. (Link)

[A-15] Ariane Emmanuelli, Jun Zheng, Maxime Huet, Alexis Giauque, Thomas Le Garrec, and Sébastien Ducruix. Description and application of a 2d-axisymmetric model for entropy noise in nozzle flows. Journal of Sound and Vibration, 2020. (Link)

[A-16] Alexis Giauque, Maxime Huet, Franck Clero, Sébastien Ducruix, and Franck Richecoeur. Thermoacoustic shape optimization of a subsonic nozzle. Journal of engineering for gas turbines and power, 135(10), 2013. (Link)

[A-17] Maxime Huet and Alexis Giauque. A nonlinear model for indirect combustion noise through a compact nozzle. Journal of Fluid Mechanics, 733:268, 2013. (Link)

[A-18] Michael Brear, Franck Nicoud, Mohsen Talei, Alexis Giauque, and Evatt Hawkes. Disturbance energy transport and sound production in gaseous combustion . Journal of Fluid Mechanics, 2012. (Link)

[A-19] Alexis Giauque, Maxime Huet, and Franck Cléro. Analytical analysis of indirect combustion noise in subcritical nozzles. Journal of Engineering for Gas Turbines and Power, 134(11):111202, 2012. (Link)

[A-20] Alexis Giauque, B Ortun, B Rodriguez, and B Caruelle. Numerical error analysis with application to transonic propeller aeroacoustics. Computers & fluids, 69:20–34, 2012. (Link)

[A-21] Alexis Giauque, Laurent Selle, L Gicquel, T Poinsot, H Buechner, P Kaufmann, and W Krebs. System identification of a large-scale swirled partially premixed combustor using les and measurements. Journal of Turbulence, (6):N21, 2005. (Link)

Conferences and Reports

[C-5] Allan Beurville, Jérôme Boudet, Vincent Clair, and Alexis Giauque. Large Eddy Simulation and Direct Noise Prediction of a Fan Stage in Transonic Regime. 14th Workshop on Direct and Large-Eddy Simulation (DLES14), Apr 2024, Erlangen, Germany. (Link)

[C-6] Jean Al Am, Vincent Clair, Alexis Giauque, Jérôme Boudet and Fernando Gea-Aguilera. “Direct noise predictions of a 360° full fan stage using LES,” AIAA 2023-4295. AIAA AVIATION 2023 Forum. June 2023. (Link)

[C-7] Jean Al-Am, Vincent Clair, Alexis Giauque, Jérôme Boudet, and Fernando Gea-Aguilera. Fan/OGV broadband noise predictions using LES. EuroHPC Summit Week 2022. (Link)

[C-8] Jean Al Am, Vincent Clair, Alexis Giauque, Jérôme Boudet and Fernando Gea-Aguilera. “Direct noise predictions of fan broadband noise using LES and analytical models,” AIAA 2022-2882. 28th AIAA/CEAS Aeroacoustics 2022 Conference. June 2022. (Link)

[C-9] Jean Al Am, Vincent Clair, Alexis Giauque, Jérôme Boudet, and Fernando Gea-Aguilera. Effet du débit sur le bruit propre d’un étage soufflante/redresseur en présence d’une bulle de recirculation. 16ème Congrès Français d’Acoustique, CFA2022, Société Française d’Acoustique; Laboratoire de Mécanique et d’Acoustique, Apr 2022, Marseille, France. ([Link]⟨https://hal.science/hal-03848139/⟩)

[C-10] Alexis Giauque, Jérôme Boudet, Hongwei Ma, and Wei Wei. Large eddy simulation of an axial compressor rotor passage: Preliminary comparison with experimental measurements. In Congrès français de mécanique. AFM, Association Française de Mécanique, 2015. (Link)

[C-11] Jun Zheng, Maxime Huet, Alexis Giauque, Franck Cléro, and Sébastien Ducruix. A 2d-axisymmetric analytical model for the estimation of indirect combustion noise in nozzle flows. In 21st AIAA/CEAS Aeroacoustics Conference, page 2974, 2015. (Link)

[C-12] Alexis Giauque, Thierry Poinsot, and Franck Nicoud. Validation of a flame transfer function reconstruction method for complex turbulent configurations. In 14th AIAA/CEAS Aeroacoustics Conference (29th AIAA Aeroacoustics Conference), page 2943, 2008. (Link)

[C-13] Alexis Giauque and H Pitsch. Detailed modeling of combustion noise using a hydrodynamic/acoustic splitting model. Center for Turbulence Research, Annual Research Briefs, pages 325–337, 2008. (Link)

[C-14] Mohsen Talei, Michael Brear, Franck Nicoud, Daniel Bodony, and Alexis Giauque. Transport of disturbance energy in hot and cold turbulent jets. In 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), page 3633, 2007. (Link)

[C-15] AX Sengissen, Alexis Giauque, GS Staffelbach, M Porta, W Krebs, P Kaufmann, and TJ Poinsot. Large eddy simulation of piloting effects on turbulent swirling flames. Proceedings of the Combustion Institute, 31(2):1729–1736, 2007. (Link)

[C-16] Alexis Giauque, Anne Laure Birbaud, and Heinz Pitsch. Entropy generated noise: a comparison between compressible simulations and golstein’s acoustic analogy. APS, 60:GH–005, 2007. (Link)

[C-17] Alexis Giauque, Franck Nicoud, and Michael Brear. Numerical assessment of stability criteria from disturbance energies in gaseous combustion. In 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), page 3425, 2007. (Link)

[C-18] Alexis Giauque and H Pitsch. Detailed modeling of combustion noise using a computational aeroacoustics model. Stanford CTR Annual Research Briefs, 2007. (Link)

[C-19] Alexis Giauque, T Poinsot, M Brear, and F Nicoud. Budget of disturbance energy in gaseous reacting flows. In Proc. of the Summer Program, pages 285–297. Center for Turbulence Research, NASA Ames/Stanford Univ., 2006. (Link)

Ph.D. Thesis

[PhD Thesis] Alexis Giauque. Flame transfer function and disturbance energies in gaseous reacting flows. PhD thesis, INP Toulouse, 2007. (Link)

Ph.D. students

Courses & Administrative Duties

Administrative Duties

Courses

Semesters 1 & 2 (Bachelor)

Semesters 3 & 4 (Master 1)

Semester 5 (Master 2)

Vitae

Since 2013 — Associate Professor — Ecole Centrale de Lyon

My current projects focus on turbulence modeling in dense gas flows and Large Eddy simulation applied to broadband noise modeling in turbomachinery.

2009 – 2013 — Research Engineer — ONERA

Development of advanced computational strategies for noise simulation

2007 – 2009 — Postdoctoral Research Fellow — CTR Stanford University

Development of splitting methods for the modeling of combustion noise in aircraft engines

2003 – 2007 — PhD Student — CERFACS

Pilot studies on the stability of terrestrial turbines combustion chambers.

1999 - 2002 — Ecole Centrale Paris

Specialization in Aeronautics and Space Engineering
Master thesis on the modeling of plasma flows (EADS Astrium)

Contact

Alexis Giauque
Associate Professor ECL/LMFA UMR 5509
Address : Batiment I11, Ecole Centrale de Lyon
36 avenue Guy de Collongue, 69130 Écully
Phone : +33 (0)4 7218 6144
Homepage : agiauque.github.io

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