Entries by dominique pirotais

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11-Control of second mode

CONTROL OF SECOND MODE INSTABILITY USING STREAK EMPLOYMENT METHOD   MUHİTTİN CELEP†, ABDELLAH HADJADJ*, MOSTAFA S. SHADLOO** †E-mail: celepm@coria.fr ,*E-mail: ahadjadj@coria.fr ,**E-mail: msshadloo@coria.fr CORIA-UMR 6614, CNRS-University, INSA of Rouen and Normandy University, 76800, Saint-Étienne-du-Rouvray, France MARKUS J. KLOKER*** ***E-mail: markus.kloker@iag.uni-stuttgart.de Institute of Aerodynamics and Gas Dynamics, University of Stuttgart, 70550 Stuttgart, Germany     Key […]

12-modelling streaks effects

Hypersonic blunt bodies: modelling streaks and their effect on different transition mechanisms Caillaud 1,2, a, E. Martini1, b, G. Lehnasch1,c, and P. Jordan 1,d 1 Institut PPRIME UPR3346 CNRS, ISAE-ENSMA, Université Poitiers,86961 Futuroscope, France 2 CEA-CESTA, 15 avenue des sablières, CS 60001, 33116 Le Barp Cedex, France a clement.caillaud@isae-ensma.fr b eduardo.martini@isae-ensma.fr c guillaume.lehnasch@isae-ensma.fr (Corresponding author) […]

13-Porous Coatings analysis

Numerical Investigation of Porous Coatings Stabilizing Capabilities on Hypersonic Boundary-Layer Transition Hammachi1,2, J. Cardesa1, E. Piot1, M. Montagnac2, H.Deniau1 1ONERA/DMPE, Université de Toulouse, F-31055 Toulouse, France 2Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS), 42 avenue Gaspard Coriolis, 31057 Toulouse Cedex 01, France Corresponding author : riwan.hammachi@onera.fr   Keywords : Transition, […]

14-Transition on BOLT forebody

Experimental hypersonic transition investigation over the BOLT forebody Authors: Loïc Sombaert1,2,†, François Nicolas1, Mathieu Lugrin1, Nicolas Severac1, Jean-Marc Luyssen1, Sylvain Morilhat1, Jean-Pierre Tobeli1, Sébastien Esquieu2, Reynald Bur1 1 DAAA, ONERA, Université Paris Saclay, F-92190 Meudon – France 2 CEA/CESTA, 33116 Le Barp cedex – France † Corresponding author   Email: † loic.sombaert@onera.fr / francois.nicolas@onera.fr / […]

15-RANS transition predictions

Comparison of RANS transition model predictions on hypersonic three-dimensional forebody configurations J.I. Cardesa1,*, G. Delattre1,** 1ONERA/DMPE, Université de Toulouse, F-31055 Toulouse, France * jcardesa@onera.fr – ** delattre@onera.fr As the interest for hypersonic vehicles has been growing over recent years, so has the research activity in the field of laminar-turbulent transition at hypersonic velocities due to […]

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16-CONE-CYLINDER-FLARE DESIGN

DESIGN OF A CONE-CYLINDER-FLARE CONFIGURATION FOR HYPERSONIC BOUNDARY-LAYER STABILITY ANALYSES AND MEASUREMENTS WITH ATTACHED AND SEPARATED FLOWS Esquieu1, S. P. Schneider2, E. K. Benitez3, J-P Brazier4 1CEA, The French Alternative Energies and Atomic Energy Commission, Le Barp, France 2School of Aeronautics and Astronautics, Purdue University, West Lafayette, Indiana, USA 3US Air Force Research Laboratory, Wright-Patterson […]

17-Wake of an isolated roughness

Linear stability analysis of the wake of an isolated roughness Jean-Philippe Brazier ONERA DMPE, Université de Toulouse, F-31400 Toulouse, France Jean-Philippe.Brazier@onera.fr     Keywords: Boundary layer, transition tripping, isolated roughness wake, 2D local linear stability Submitted for an oral presentation.   Abstract: The effect of an isolated roughness on the laminar-turbulent transition has been the […]

18-Disturbances over Blunt Cones

Nonlinear Nonmodal Disturbances over Blunt Cones at Mach 6 Paredes∗, A. Scholten†, M. Choudhari‡, F. Li‡, M. H. Carpenter‡, and M. Bailey§ ∗ National Institute of Aerospace, Hampton, VA 23666, USA † North Carolina State University, Raleigh, NC 27695, USA ‡ NASA Langley Research Center, Hampton, VA 23681, USA § The University of Arizona, Tucson, […]

19-Thermal non-equilibrium

Thermal non-equilibrium of a high-enthalpy free shear layer during breakdown to turbulence Ali Musawi *, Neil D. Sandham * m.a.musawi@soton.ac.uk , n.sandham@soton.ac.uk * University of Southampton, Boldrewood Innovation Campus, Burgess Rd, Southampton SO16 7QF, United Kingdom Key Words: Thermal Non-Equilibrium, Hypersonic, Turbulence, Mixing Layer, Direct Numerical Simulation   Abstract Under the high-enthalpy conditions seen in […]

20-Free-stream fluctuations

Free-stream fluctuations of a hypersonic conventional wind-tunnel using static and stagnation pressure sensors Sylvain Morilhat, Mathieu Lugrin, Jean-Pierre Tobeli, Nicolas Severac, Jean-Marc Luyssen, Reynald Bur ONERA DAAA, 8 rue des Vertugadins, 92190 Meudon, France, sylvain.morilhat@onera.fr, mathieu.lugrin@onera.fr, jean-pierre.tobeli@onera.fr, nicolas.severac@onera.fr, jean-marc.luyssen@onera.fr, reynald.bur@onera.fr   Keywords : Blow-down wind-tunnel, Turbulence level, Pressurefluctuations Abstract Hypersonic wind tunnels cannot reproduce all the […]