14H00 : n° 1082 Statistical Evaluation of the Shock Wave Boundary Layer Interaction Phenomenon

Muhammad Farrukh Shahab Guillaume Lehnasch Thomas Gatski Pierre Comte Afaque Shams
Laboratoire d'Etude Aérodynamiques
Turbulent velocity and thermal correlations from direct numerical simulation data of a spatially growing compressible turbulent boundary layer interacting with an impinging shock are discussed. The cross-stream variation of the velocity second-moments and the thermal fluxes one boundary layer thickness upstream of the shock impingement point are discussed. Other correlations are examined to further statistically quantify the effect of the oblique shock-turbulence interaction.

14H40 : n° 1059 Detached Eddy Simulation of Restricted Shock Separated flow in a Thrust Optimized Contoured nozzle

Afaque Shams Stève Girard Pierre Comte
Laboratoire d'Etudes Aérodynamiques
Detached Eddy Simulation of restricted shock separated (RSS) flow has been performed to understand the physics of complex cap-shock pattern, which is the key cause of separated flow transition in the rocket nozzles. High-order shock-capturing numerical schemes are necessary to understand this complex flow. Hence a fifth order monotonicity preserving weighted essentially non-oscillatory (MPWENO) scheme is used here for good numerical resolution.

15H00 : n° 1073 Three-dimensional separation in shock/boundary layer interaction

Lionel Agostini Lionel Larchevêque Pierre Dupont Jean-Paul Dussauge
IUSTI, UMR CNRS 6595, Université Aix-Marseille I
A Large-eddy simulation of a shock impinging on a turbulent boundary layer is carried out and demonstrates good agreement with the experiments. A special emphasis is put on the analysis of the three-dimensional modulation of the flow in order to clarify the origin of the mean vortices located in the separation region highlighted by the experiment

15H20 : n° 1077 A priori analysis of subgrid-scale models for shock wave / boundary layer interaction

Guillaume Lehnasch Farrukh Shahab Pierre Comte Tom Gatski
LEA, CNRS UMR6609, Ensma, Université de Poitiers
This study addresses the subgrid-scale modeling issue for large eddy simulation of shock wave / boundary layer interaction. By using a reference flow database, obtained by direct numerical simulation, a priori testing of the most prominent LES models is carried out. The various modelling and filtering approaches are discussed and compared, leading to suggest a priori the most appropriate closure strategy.