Entries by dominique pirotais

,

FAR2025 : save the date

 ESA will organize in conjunction with HyFAR-ARA the 3rd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry  (FAR 2025) from May 18th 2025 to May 22nd 2025. The conference will take place in Palais des Congrès of Arcachon (France). FAR 2025 The International Conference on Flight Vehicles, Aerothermodynamics and Re-entry  (FAR) is an international event […]

,

Reentry vehicle ablation

Maxime Stuck thesis « Ablation d’un matériau de protection thermique en régime turbulent » (« Thermal protection material ablation in turbulent regime ») has been defended on December 12th 2023 (ISAE-Université de Toulouse). The thesis addresses the coupling between ablation and turbulence that triggers the apparition of surface roughnesses on hypersonic vehicles ablative TPS during […]

,

A successful symposium

The second edition[1] of the European Symposium on laminar/turbulent Transition in Hypersonic Regime (TRANSITION 2023) has been organized by HyFAR-ARA (www.hyfar-ara.org) at Cap Sciences (Bordeaux, France) from October 4th to  6th 2023. During 3 days this event has gathered 50 scientists and engineers coming from Belgium, France, Germany, Netherlands, UK, US and issued from academic, […]

THE CNES JOINS HyFAR-ARA

On May 5th 2023, the administration board of HyFAR-ARA officially validated CNES as new member of the association. The French space agency (CNES, Centre National d’Etudes Spatiales) is a public administration with industrial and commercial purposes. CNES is under supervision of the French Ministries of the Economy, Defense and Research. CNES missions is to steer […]

1-vehicle design criteria

Establishing Vehicle Design Criteria to Postpone Transition Onset along Trajectories of Generic Flight Vehicles Frederik Jacobs 1*, Johan Steelant 2 * Corresponding author 1 Young Graduate Trainee, ESA/ESTEC, Keplerlaan 1, 2201AZ Noordwijk, The Netherlands, Frederik.Jacobs@esa.int 2 Senior Flight Vehicles & Aerothermodynamics Engineer, ESA/ESTEC, Keplerlaan 1, 2201AZ Noordwijk, The Netherlands, Johan.Steelant@esa.int   Keywords: Transition visualization, High-speed […]

2-WALL BLOWING AND HEATING

Adjoint-based linear sensitivity of a hypersonic boundary layer to steady wall blowing or heating Arthur POULAIN¹, Denis SIPP¹*, Cédric CONTENT¹, Georgios RIGAS², Eric GARNIER¹ ¹ DAAA, ONERA, Université Paris Saclay, F-92190 Meudon, France – denis.sipp@onera.fr, arthur.poulain@onera.fr, cedric.content@onera.fr, eric.garnier@onera.fr ² Department of Aeronautics, Imperial College London, London SW7 2AZ, United Kingdom – g.rigas@imperial.ac.uk * Corresponding author […]

3-breakdown of second modes

Fundamental breakdown of second modes in the High Enthalpy Shock Tunnel Göttingen   Divek SURUJHLAL 1 *, Alexander WAGNER 2 * Corresponding author 1German Aerospace Center (DLR) Göttingen, Department of Spacecraft surujhlal@dlr.de 2German Aerospace Center (DLR) Göttingen, Department of Spacecraft wagner@dlr.de   Abstract Boundary layer transition in a hypersonic flow with a zero-pressure gradient takes […]

5-cone-cylinder-flare experiment

Experimental investigation of the transition process and boundary layer separation on a hypersonic cone-cylinder-flare geometry Clément Caillaud 2, Mathieu Lugrin ∗,1,  Sébastien Esquieu 2 1DAAA, ONERA, Paris Saclay University, F-92190 Meudon – France 2CEA-CESTA, 15 Avenue des Sablières, Le Barp, France ∗mathieu.lugrin@onera.fr Experiments are conducted in the ONERA R2Ch (see figure 1) hypersonic wind tunnel to […]

6-Ultrasonically Absorptive material

OCTRA as Ultrasonically Absorptive Thermal Protection Material for Hypersonic Transition Suppression analyzed on a 7° Cone Viola WARTEMANN 1*, Alexander WAGNER2, Divek SURUJHLAL3, Giannino PONCHIO CAMILLO4, Christian DITTERT 5, Carolin RAUH 6 * Corresponding author 1*  German Aerospace Center (DLR), Spacecraft Department, Institute of Aerodynamics and Flow Technology, Lilienthalplatz 7, 38108 Braunschweig, Germany, Viola.Wartemann@dlr.de 2  […]

7-Cone-cylinder flare analysis

Numerical investigation of the transition process and boundary layer separation on a hypersonic cone-cylinder-flare geometry Clément Caillaud*,1, Mathieu Lugrin 2, Sébastien Esquieu 1 1CEA-CESTA, 15 Avenue des Sablières, Le Barp, France 2DAAA, ONERA, Paris Saclay University, F-92190 Meudon – France *clement.caillaud@cea.fr   Characterizing the boundary layer transition to turbulence around realistic hypersonic vehicles is a […]