Characterization of the pressure fluctuations within a Controlled-Diffusion airfoil boundary layer at large Reynolds numbers

Radouan Boukharfane (1) , Julien Bodart (1) , Marc C. Jacob (1, 2) , Laurent Joly (1) , Thibault Bridel-Bertomeu (3, 1) , Thomas Nodé-Langlois (4)

1 DAEP - Département Aérodynamique Energétique et Propulsion
2 LMFA - Laboratoire de Mecanique des Fluides et d'Acoustique
3 CEA - Commissariat à l'énergie atomique et aux énergies alternatives
4 Airbus [France]

The present investigation targets the generation of airfoil trailing-edge broadband noise that arises from the interaction of turbulent boundary layer with the airfoil trailing edge. Large-eddy simulations, carried out using a massively parallel compressible solver CharLESX, are conducted for a Controlled-Diffusion (CD) airfoil with rounded trailing edge for seven configurations, characterized with a Reynolds number, angle of attack and Mach number. An analysis of the unsteady pressure signals in the boundary layer is proposed in regard to classical trailing edge noise modelling ingredients.

Mots clés: Controlled-Diffusion Airfoil; Boundary Layer; High Mach Number; High Reynolds number; Large-Eddy Simulation; Turbulence; Shocks; Separation; Controlled-Diffusion Airfoil

Domaines: Acoustique [physics.class-ph]

Radouan Boukharfane, Julien Bodart, Marc C. Jacob, Laurent Joly, Thibault Bridel-Bertomeu, et al.. Characterization of the pressure fluctuations within a Controlled-Diffusion airfoil boundary layer at large Reynolds numbers. 25th AIAA/CEAS Aeroacoustics Conference (Aeroacoustics 2019), May 2019, Delft, Netherlands. pp.1-17, ⟨10.2514/6.2019-2722⟩. ⟨hal-02200478v2⟩