ABSTRAKT

In the present paper, a Large Eddy Simulation (LES)- dedicated experimental database is introduced for the assessment of Subgrid Scale (SGS) models in complex geometries. The experiment consists in a pulsatile impinging jet in presence of a turbulent cross flow. The configuration involves different flow features encountered in complex configurations: shear/rotating regions, stagnation point, wall-turbulence interaction as well as the propagation of a vortex ring on the impinging surface. The experiment was designed so as it is easily reproducible with LES and to allow the use of quantitative and non intrusive optical diagnostics. Measurements of velocity in different planes were performed using Particle Image Velocimetry (PIV). Some LES results using the dynamic Smagorinsky model (Germano et al., 1991) and the s-model (Nicoud et al., 2011) are presented.