
Airiau Christophe
- Address 1 :
IMFT
2 Allée Allée du Professeur Camille Soula
31400 TOULOUSE
- Address 2 :
Université Paul Sabatier, Dpt Mécanique
Bat 1R2, UFR MIG
118 route de Narbonne
31062 Toulouse cedex 4
- Phone IMFT : 05 34 32 28 37 (not used)
- Phone UPS : 05 61 55 62 53 (not used)
- Email :
- christophe.airiau.at.toulouse-inp.fr
- christophe.airiau.at.iniv-tlse3.fr
- christophe.airiau.at.imft.fr
List of sections

Last new (June 2022):
- see github site with the update of FundAeroSuite
- Plan de Relance’ project : French Metallurgy Fab
- publication: 2 new publications in 2022
- New edition of the book “exercices et problèmes d’aérodynamique fondamentale”
Positions
- Full Professor in the Mechanics department of Paul Sabatier, Toulouse III university, Sciences and Engineering Faculty (UPS/FSI)
- Researcher at l’IMFT
- member of the research group ASI (Aérodynamics, Wakes, Interaction) at IMFT.
- In charge of the tranversal axis “Transportation, Aeronautics and Space” at IMFT
- Participants to the Toulouse University interdisciplinary axis “Aeronautics, Space and new mobilities”
- In charge of “Master 2 MSME, Modelling, Simulation in Mechanics and Energetics, Toulouse III university
My books (in French only)
- « Exercices et Problèmes d’Aérodynamique Fondamentale, accompagnés des codes solutions en python et fortran », C. Airiau, A. Giovannini and P. Brancher
- editor website : Exercices et problèmes d’Aérodynamique Fondamentale
- The book is a collection of 120 exercises and problems with their correction. 90 corrections can be found in the numerical suite available on GitHub (july 2019) :
https://github.com/CAiriau/FundAeroSuite
- the numerical suite has been translated in english in 2020.
An updated version of the Erratum can be found here : erratum (May 2021)
An erratum of the Prandtl-Meyer expansion table (omega(Mach) function) is here : erratum-table
Social networks
- Linkedln, Viadeo
- Orcid (0000-0001-7453-2964), Web of Science ResearcherID ABC-7731-2020
- Web of Science page
- ResearchGate, Academia, google scholar, Publons
- Skype, Zoom, Discord, MS Teams, …
- OATAO here
- GitHub : https://github.com/CAiriau
Teaching activities (2015 – today)
- L1 (first year of university): Mechanics, Physics
- L3 : Structures (elasticity, beam theory), introduction to numerical tools (Shell, Matlab), introduction to flight, projects
- M1 (Master 1): Aerodynamics, projects
- M2 MSME (Master 2) : viscous, compressible flows, optimisation in aeronautics, projects, CFD, Data Analysis, Fluid-Structure Interaction, POD, FFT, Matlab, model programming
Research topics
- Modal and nonmodal instabilities in boundary layers, in MHD flows
- Receptivity and sensitivities et sensibilité with adjoint
- Flow control, sound control (open and close-loop approaches)
- Propulsion : distributed propulsion, propellers, ionic wind (2020 -> today)
- additionnal topics:
- model reduction, ROM
- optimization
- turbulent boundary layer
- modelling of non homogenous media, porous media (2019 -> today)
- heat transfer – mass transfer analogy
- rarefied gas, DSMC (2021 – 2022)
Supervisor
Doctoral positions, co-supervisor
- P. Cathalifaud, 2000, 50%
- S. Walther, 2001, 50%
- B. Spagnoli, 2006, 100%
- A. Barthet, 2007, 50%
- A. Guaus, 2008, 50%
- M. Soueid, 2008, 50%
- T. Gandhi, 2009, 50%
- L. Moret-Gabarro, 2009, 100%
- K.K. Nagarajan, 2010, 100%
- L. Bisanti, 2013, 50%
- T. Ansaldi, 2016, 100%
- C. Perez-Arroyo 2016, 50%
- N. Luminari, 2018, 50%
- V. Khayiguian, 2019-2021, 50%
- G. Bourdon, 2021 – 2024, 50%
Post-doctoral positions
- 2010-2012, J. Weller-Calvo, 18 months (ANR Cormored), 50% Jean-Pierre Raymond (IMT)
- 2015-2017, M. Carini, 18 months (CARPE project)
- 2019-2020, J. Cardesa 18 months (3C2T project)
- 2019-2021, P. Bonnefis, 18 months , Project Ready-Nov HyperloopTT (co-supervisor)
Participating to projects
- 1999 – 2001 : French-Swedish cooperation: optimal control of the boundary-layers
- 2000 – 2003 : european project ALTTA (Application of Hybrid Laminar Flow Technology on Transport Aircrafts), task 3.1.4 adjoint methods.
- 2003 – 2011 : project DFG/CNRS LES Complex Flows and LES-DNS Acoustics, then in GDRE “computational fluid mechanics”
- 2006 – 2009 : european Marie Curie EST action AeroTraNet (Unsteady aerodynamics training network in airframe components for competitive and environmentally friendly civil transport aircraft.
- 2007 – 2008 : BQR Toulouse III (fundings), Estimation et contrôle des écoulements aérodynamiques, with J.P. Raymond (Institut de Mathématiques de Toulouse)
- 2008-2012 : ANR Cormored (National Research Agency): Contrôle optimal et robuste par modèles d’ordres réduits d’écoulements décollés. Partners : LIMSI, LEA, SINUMEF, IMT, MAB, ONERA.
- 2010 – 2012 : ECOSEA project, Estimation, Contrôle et Stabilisation d’Ecoulements Aérodynamiques, aeronautic fundation FNRAE. Parnerts: IMT, LadyX ONERA.
- 2013 : work group RTRA : Flow Control (FloCon)
- 2013 – 2016, european Marie Curie project , AeroTraNet 2: jet noise, instability, sensitivity and control
- 2013-2017, RTRA CARPE project coordinator : robust control of thick flat plate wake, partners : ONERA, IMT, ISAE, LAAS
- 2015 – 2018, Bottaro’s chair of excellence, Bioskin project : modelling and simulation of fibrous wall flows, 1 PhD (Luminari)
- 2018-2020, RTRA 3C2T, project coordinator : control of transitional and turbulent compressible boundary layers. Partners : CERFACS, ONERA
- 2019 – 2022 ReadyNov HyperloopTT regional project
- 2019 -> today : porous media flow modelling using adjoint equations (self – funding)
- 2021 – 2023 ANR PROPULS-ION, coordinator: F. Plouraboué (IMFT)
- 2021 – 2024 France relance project : French Metallurgy Lab (with A. Bergeon, S. Tanguy, IMFT), PhD thesis
- 2020 – 2022 : RTRA e-AIRchitecture (RTRA funding), work group on electrical and distributed propulsion (one master thesis + self-funding)
- 2020 – 2021, uncertainty quantification of turbulent jet stability characteristics, partner : University of Malaga. (self-funding)
Publications
Publications in preparation or submitted
- 2 new publications accepted
Web publications
- Advances in Engineering, Metamodelling and porous media,
- FundAeroSuite sur Linkedin
- FundAeroSuite sur GitHub
Papers, books
- Stability and dynamics of the flow past of a bullet-shaped blunt body moving in a pipe. P. Bonnefis, D. Fabre, C. Airiau, Journal of Fluid Mechanics, 2022 Accepted
- Optimizing an acoustic liner by automatic differentiation of a compressible flow solver J.I. Cardesa, R. Fiévet, E. Piot, H. Deniau, C. Airiau. Journal of Computational Science, https://doi.org/10.1016/j.jocs.2022.101703. Volume 61, May 2022, 101703
- Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet, F.-J. Granados-Ortiz, C. Airiau, J. Ortega-Casanova, International Journal of Mechanical Sciences, Volume 213, 2022, 106847, Download
- Adjoint computations by algorithmic differentiation of a parallel solver for time-dependent PDEs, J.I.Cardesa, L.Hascoët, C.Airiau, Journal of Computational Science, vol. 45, 101155, doi, 2020
- Flow of shear-thinning fluids through porous media, C. Airiau, A. Bottaro, Advances in Water Resources, Volume 143, September 2020, 103658, doi,
- C.Airiau, A. Giovannini et P. Brancher [Exercices et problèmes d’Aérodynamique Fondamentale, Link, Cépaduès éditions, 2019, I.S.B.N. : 9782364937253, 383 pages.
- A penalization method to treat the interface between a free-fluid region and a fibrous porous medium., Nicola Luminari, Giuseppe A. Zampogna, Christophe Airiau, Alessandro Bottaro, Journal of Porous Media, Vol. 22, no. 9, 2019, pp. 1095-1107
- Identication of temporal and spatial signatures of broadband shock-associated noise mechanism,C. Pérez-Arroyo, G. Daviller, G. Puigt, C. Airiau, S. Moreau (2018) Shock Waves, January 2019, Volume 29, Issue 1, pp 117–134. Link
- On the Influence of Uncertainty in Computational Simulations of High-Speed Jet Flow from an Aircraft Exhaust. F. Granados-Ortiz, C. Perez Arroyo, G. Puigt, C.-H. Lai, C. Airiau. Computers and Fluids, déc. 2018. doi . Vol . 180, pp. 139-158, February 2019
- Effects of porosity and inertia on the apparent permeability tensor in fibrous media N. Luminari, C. Airiau, A. Bottaro (2018), International Journal of Multiphase Flow Volume 106, September 2018, Pages 60-74 doi
- Hydrodynamic- acoustic filtering of a supersonic under-expanded jet, C. Pérez-Arroyo, G. Daviller, G. Puigt, C. Airiau, dans “Direct and Large-Eddy Simulation X, Editors D.G.E Grigoriadis, B.J. Geurts, H. Kuerten, J. Fröhlich, V. Armenio, Springer, 2017, ISBN 978-3-319-63212-4
- Open-loop control of cavity noise using Proper Orthogonal Decomposition reduced-order model.K.K. Nagarajan, S.Singha, L. Cordier, C. Airiau, Computers and Fluids, doi, 160 (2018) 1–13
- Stabilization and best actuator location for the Navier-Stokes equations. C. Airiau, J.M Buchot, R. K. Dubey, M. Fournié, J.P. Raymond, J. Weller. SIAM journal of science computing. Vol. 39, No. 5, p. 993-1020 (2017)
- Global stability and control of the confined turbulent flow past a thick flat plate M. Carini, C. Airiau, A. Debien, O. Leon, and J. O. Pralits, Physics fluids, Physics of Fluids 29, 024102 (2017); doi
- N. Luminari, C. Airiau, A. Bottaro Drag-model sensitivity of Kelvin-Helmholtz waves in canopy flows, physics of fluids,Vol. 28, (12), 2016, doi 124103
- R. Monthéard, M. Bafleur, V. Boitier, X. Dollat, N. Nolhier, E. Piot, C Airiau, J-M Dilhac, Coupling Supercapacitors and Aeroacoustic Energy Harvesting for Autonomous Wireless Sensing in Aeronautics Applications, Energy Harvesting and Systems, vol. 3, Issue 4, p. 265-276, dec. 2016, doi,
- A. Giovannini et C. Airiau, Aérodynamique Fondamentale, Link, Cépadues éditions, 2016, 578 p
- Nagarajan K. K.; Cordier L., Airiau C. Development and application of a reduced order model for the control of self-sustained instabilities in cavity flows. Commun. Comput. Phys., Vol. 14, N° 1, pp. 186-218, 2013
- Rona, A.; Monti, M; Airiau, C. On the generation of the mean velocity profile for turbulent boundary layers with pressure gradients under equilibrium conditions, The Aeronautical Journal, (16), N° 1180, 569 -597, 2012
- Soueid, H; Guglielmini, L; Airiau, C; Bottaro, A. Optimization of the motion of a flapping airfoil using sensitivity functions. COMPUTERS & FLUIDS, 38, 4, 861-874, 2009.
- Guaus, A; Airiau, C; Bottaro, A; Kourta, A. Effects of wall compliance on the linear stability of Taylor-Couette flow. JOURNAL OF FLUID MECHANICS, 630, 331-365, 2009.
- Spagnoli, B; Airiau, C. Adjoint analysis for noise control in a two-dimensional compressible mixing layer. COMPUTERS & FLUIDS, 37(4), 475-486, 2008.
- Debbagh, K; Cathalifaud, P; Airiau, C. Optimal and robust control of small disturbances in a channel flow with a normal magnetic field. PHYSICS OF FLUIDS, 19(1), 2007.
- Airiau, C; Castets, M. On the amplification of small disturbances in a channel flow with a normal magnetic field. PHYSICS OF FLUIDS, 16(8), 2991-3005, 2004.
- Airiau, C; Bottaro, A, Walther, S; Legendre, D. A methodology for optimal laminar flow control: Application to the damping of Tollmien-Schlichting waves in a boundary layer. Physics of Fluids, 15(5), 1131-1145, 2003.
- Airiau, C; Walther, S, Bottaro, A. Boundary layer sensitivity and receptivity. COMPTES RENDUS MECANIQUE, 330(4), 259-265, 2002.
- Walther, S., Airiau, C., Bottaro, A. Optimal control of Tollmien-Schlichting waves in a developing boundary layer. PHYSICS OF FLUIDS, 13(7), 2087-2096, 2001.
- Airiau, C. Non-parallel acoustic receptivity of a Blasius boundary layer using an adjoint approach. FLOW TURBULENCE AND COMBUSTION 65, 347-367, 2000.
- Pralits, JO; Airiau, C; Hanifi, A; Henningson, DS. Sensitivity analysis using adjoint parabolized stability equations for compressible flows. FLOW TURBULENCE AND COMBUSTION, 65, 321-346, 2000.
- Cathalifaud, P; Airiau, C; Giovannini, A. Streamwise counter-rotating vortices interaction with a laminar boundary layer. COMPUTATIONAL FLUID DYNAMICS ’98, VOL 1, PARTS 1 AND 2. 792-797, 1998.
- Airiau, C; Casalis, G. Linear and nonlinear laminar boundary-layer stability using the parabolized stability equations. COMPTES RENDUS DE L’ACADEMIE DES SCIENCES SERIE II, 318(10), 1295-1300, 1994.
- Airiau, C; Casalis, G. Boundary-layer linear stability using a system of parabolic equations. RECHERCHE AEROSPATIALE, 5, 57-68, 1993.
Some proceedings
- Sensitivity analysis for subsonic jet using adjoint of non local stability equations (AIAA 2015-2219) C. Airiau, T. Ansaldi. 21st AIAA/CEAS Aeroacoustics Conference, 2015, 10.2514/6.2015-2219
- PSE-based sensitivity analysis of turbulent and supersonic single stream jet (AIAA 2016-3052) T. Ansaldi, C. Airiau, C. Pérez Arroyo, G. Puigt. 22nd AIAA/CEAS Aeroacoustics Conference, 2016, 10.2514/6.2016-3052
- Large Eddy Simulation of Shock-Cell Noise From a Dual Stream Jet (AIAA 2016-2798). C. Pérez Arroyo, G. Puigt, C. Airiau, J.-F. Boussuge. 22nd AIAA/CEAS Aeroacoustics Conference, 2016, 10.2514/6.2016-2798
- Uncertainty Quantification and Sensitivity Analysis applied to an under-expanded single jet (AIAA 2016-4091) F. J. Granados-Ortiz, C. Perez Arroyo, C.-H. Lai, G. Puigt, C. Airiau. 46th AIAA Fluid Dynamics Conference, 2016, 10.2514/6.2016-4091
- Broadband Shock-cell Noise Signature Identification Using a Wavelet-based Method (AIAA 2016-2732) L. Gefen, C. Pérez Arroyo, R. Camussi, Gu. Puigt, C. Airiau, 22nd AIAA/CEAS Aeroacoustics Conference, 2016, 10.2514/6.2016-2732
- Powering a Commercial Datalogger by Energy Harvesting from Generated Aeroacoustic Noise R Monthéard, C Airiau , M Bafleur, V Boitier, J-M Dilhac, X Dollat , N Nolhier, E Piot, Journal of Physics: Conference Series 557 (2014) 012025, doi:10.1088/1742-6596/557/1/012025
My AOTAO news
Links, web sites
- Coding: my page GitHub
- Teaching: master 2 site M2 MSME
- Mechanics and Energetics department, Toulouse III university UPS/department
- Master 2 DET Fluid Dynamic, Energetics and Transfers
Use of numerical tools
Softwares, numerical simulations
- Drawings : inkscape, gimp, draw, krita,
- Text editor: gvim, VSC, sublime, gedit, word
- IDE : VSC, Pycharm,
- Simulations : FreeFem++, OpenFoam,
- Data from plots : G3Data
- Calculus : Calc, Excel
- Presentation : impress, power point, beamer
- Browser : chromiun, firefox, opera, …
- Video communications : Zoom, Discord, Teams, …
- Viewer : evince, gv, foxit reader, xpdf, eog (images)
- Terminal : Terminator,
- audio, video: audaticity, VLC
- video/pdf editors : pdfsam, OBS studio
- Stylus lab: write (hand writing)
- Data viewer: Tecplot, Paraview, gnuplot, grace
- Synchronization : owncloud, nextcloud
- notebook Jupyter
Languages
- Bash
- Python
- Fortran
- Matlab, Octave
- Maple
- Latex, beamer
- C
- markdown
- RsT
- html
- Sphynx, Doxygen
List of sections
Last changes:
- June 4 2022:
- update publications
Notes
- yellow : #FDD247
- blue : #1569AE
- grey : #8c8c8c
To do
- Improve the bibliography
- Add figures or pictures
- Topic of interest
Research activities
RTRA projects [1, 2]
The institution dedicated to Sciences and technology for Aeronautics and Space (RTRA – STAE) has funded the CARPE project (2013 – 2017) and 3C2T (2018 – 2020) supervised by IMFT (C. Airiau) and related to the studies of sensitivities and flow control.
The first project concerned the robust control of wake instability of a thick flat plate in the laminar and turbulent regime. It was carried out in collaboration with the LAAS, CERFACS, ISAE and ONERA research centers and contained theoretical, numerical and experimental works. The vorticity given from URANS simulation are shown in the figure, in the active control configuration for different time instants (Carini et al, Phys. Fluids, 2017). An original stability and sensitivity analysis of the experimental wake obtained in a ONERA wind tunnel, has been performed by reconstruction of the velocity field and with a adjoint stability approach.
Figure :wake active control. Turbulent streamwise velocity field longitudinale (URANS) for (a) t=380, (b) t=440, (c) t=560, (d) t=680 (streamlines show at final state asymetry). The control law stabilizes the global unstable modes.
The second project is related to the control of the transitional and turbulent boundary layer in the low speed and hypersonc regime. The CERFACS and ONERA research centers were the project partners. The goal was to create a new numerical platform based on the new high order JAGUAR code developed by CERFACS able to solve accurately aerodynamics and flow control of complex configurations. The sensivity and flow control of reference cases as airfoil and flate plate boundary layers flows have been performed with the help of algorithmic differentiation. The Tapenade tools has been used to do that, in collaboration with INRIA and the Adjoint MPI library. These original study on unsteady flows were really challenging, from numerical and computer science view points.
Turbulent jet and uncertainty quantification [3, 4, 5]
The uncertainty quantification on a under-expanded supersonic turbulent jet at outlet Mach number of 1.15 has been developed in the framework of a Marie Curie AeroTranet 2 projet ( add years) in collaboration with CERFACS and Greenwich university, by RANS simulations. The influence of two input physical parameters (stagnation pression and laminar to turbulent viscosity ratio) onto the shock cells have been analysed and compared to experimental results. The high global sensitivity (variance) of the nozzle lips has been experienced. Approaches details can be found in (Granados-Ortiz et al., Phys. Fluids 2017).
This work has been completed (2020-2021) by coupling the RANS simulations to a Linear Stability approach (Parabolized Stability Equations) in order to get uncertainty of the two main parameters to the stability characteristics of the turbulent jet (“Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet”, submitted, june 2021)
Related publications
- Global stability and control of the confined turbulent flow past a thick flat plate M. Carini, C. Airiau, A. Debien, O. Leon, and J. O. Pralits, Physics fluids, Physics of Fluids 29, 024102 (2017); doi
- Adjoint computations by algorithmic differentiation of a parallel solver for time-dependent PDEs, J.I.Cardesa, L.Hascoët, C.Airiau, Journal of Computational Science, vol. 45, 101155, doi, 2020
- Identication of temporal and spatial signatures of broadband shock-associated noise mechanism,C. Pérez-Arroyo, G. Daviller, G. Puigt, C. Airiau, S. Moreau (2018) Shock Waves, January 2019, Volume 29, Issue 1, pp 117–134. Link
- On the Influence of Uncertainty in Computational Simulations of High-Speed Jet Flow from an Aircraft Exhaust. F. Granados-Ortiz, C. Perez Arroyo, G. Puigt, C.-H. Lai, C. Airiau. Computers and Fluids, déc. 2018. doi . Vol . 180, pp. 139-158, February 2019
- Addressing the Impact of Non-intrinsic Uncertainty Sources in the Stability Analysis of a High-Speed Jet, F. Granados-Ortiz, C. Airiau, J. Ortega-Casanova (submitted, june 2021)
In 2015 A. Bottaro got a chaire of excellence at IMFT, funding by the IDEX UNITI program of the University of Toulouse. The global project refered as “Bioskins” provided a PhD thesis with a co supervision A. Bottaro and C. Airiau on the modelling and simulation of flow around heterogenous walls, non rigid and non smooth.
The natural skins for instance are build from micro-fibers and can be rough, porous, elastic, or equipped with complexe geometrical at different scales. These bio-inspired wall research assumes that the nature is optimized to reduce drag and to enhance global aerodynamic performance of fishes and birds or other natural shapes. Natural canopy flow is another example of natural flexible structures . A better understanding of the physics and an accurate theroretical and numerical modelling of that physics should lead to reduce the energetic consumption of future vehicles. The scientic issues are related to fluid-structure interaction, flow control, the flexible porous media modelling, hydodynamic stability, multi-scale numerical simulation, model reduction and surrogates.
Canopy flow modelling [1]
The first part of the project has been dedicated to the study of the sensitivity of the Kelvin-Helmholtz instabilities generated on a experimental canopy flow and analyzed with a turbulent drag model. Two layers are considered in this flow : a fibrous one and a upper boundary layer flow (cf. Fig. a). Each layer are assumed isotropic and they were coupled at their interface with a shear stress. The sensitivity of the unstable modes is studied with the help of adjoint stability equations. The non linear model of the full problem is a mixing between theories and experimental correlations, proposed by Ghisalberti and Nepf. A large sensitivity of the instabilies to very small mean flow variations has been demonstrated, especially to the parameters of the turbulent drag model. Finally, an new anisotropic model based on previous Zampogna and Bottaro ‘s work using a tensorial permability has been developped to introduce a new mixte condition at the interface for the stability and sensitivity problems.Figure : sketch of the canopy momami modes (a). streamwise velocity fiel in fibrous media given with VANS approach (b) and by direct numerical simulation for Re = 1000 (c).
Fibrous interface modelling [2]
The porosity effect has been analyzed in an inertiel flow with a an fibrous interface modelled by an apparent permeability tensor ( (Luminari et al., Int. J. Multiph. Flow, 2018). The goal was to identify the tensor components by simulation of various tridimensional flow cells containig a given fiber geometry using the VANS (“Volume Average Navier-Stokes”) approach. The VANS was taking into account of the pressure gradient direction defined with Euler angles et and of its amplitude in order to define a average microscopic Reynolds number on the cell. More than one hundred direct numerical simulations were used to generated an original database. After its validation, a meta-model has been built with a Kriging approach and surface response has been obtained for each local permeability tensor component. This meta-model is available on GithHub and can be implemented in any global numerical simulation of flexible porous media flow with a VANS approach. In a last step the meta-model has been implemented into a local Navier-Stokes code to simulate a flow with a coupling between a free flow layer and a fibrous media flow with a penalisation method for the porosity and permeability properties (Luminari et al., J. Porous Media, 2019). The methodology has been validated with direct numerical simulation of the full flow, in a renge of Reynolds number beyond the inertial regime (figs. b et c). This latter work was a significant contribution to the Bioskins project and could be very helpfull for future simulations of aerodynamic flow over complex wall.Porous media modelling in non-Newtonian fluid [3]

Figure :(a) Second invariant of the rate of strain tensor, γ̇(0) , and (b) viscosity µ (0) . The macroscopic pressure gradient within the unit cell is inclined at α = 30 degrees with respect to the direction of the x-axis.
- N. Luminari, C. Airiau, A. Bottaro Drag-model sensitivity of Kelvin-Helmholtz waves in canopy flows, physics of fluids,Vol. 28, (12), 2016, doi 124103
- Effects of porosity and inertia on the apparent permeability tensor in fibrous media N. Luminari, C. Airiau, A. Bottaro (2018), International Journal of Multiphase Flow Volume 106, September 2018, Pages 60-74 doi
- Flow of shear-thinning fluids through porous media, C. Airiau, A. Bottaro, Advances in Water Resources, Volume 143, September 2020, 103658, doi
Propellers – wing interactions
Period : 2020 – 2022
Participants : C. Airiau (IMFT), J.C. Jouhaud (Cerfacs), S. Subramanya (ISAE-Sup Aero), …
Future aircraft of small and middle size will use electrical energy to generate thrust. Many recent studies are dedicated to the distributed propulsion meaning that thrust will be provided by a large numbers (upt to 17) of engines. The present activity is related to first developped tools able to pre design a propeller and a wing taking into account of the propellers wakes and wing interactions, and eventually propellers-propellers interactions. First, the old single-propeller / wing interaction is currently implemented in a new python tool for rapid design.
In parallel numerical simulations (RANS) on various configurations are tested based on a rotordisk approach interacting with a wing. The idea is to generate a parametrized problem and response surface to get a surrogates model, later implemented in the new tool.
Work is currently in progress and started in mid-2020.
Propulsion with ionic wind
Period : 2020 – 2022
Participants: F. Plouraboué, C. Airiau, F. Fabre
Fundings : ANR
This work is supervised by F. Plouraboué and in collaboration with D. Fabre. The idea is to design a ionic wind just upstream a wing to generate a local flow able to generate thrust without destroying lift.
Many issues related to ionic wing generation have to be solved. My present contribution will be related to the modelling of the aerodynamics with distributed thrust along the wing surface and to perform some optimization with respect to the main ionic wing parameters.