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A DEDICATED LES EXPERIMENTAL DATABASE FOR THE ASSESSMENT OF LES SGS MODELS: THE PULSATILE JET IMPINGEMENT IN TURBULENT CROSS FLOW

Hubert Baya Toda
Energy Applications Techniques IFP Energie Nouvelles Rueil - Malmaison, France

Olivier Cabrit
CERFACS, CFD Team Toulouse, France; Department of Mechanical Engineering University of Melbourne Victoria 3010, Australia

Karine Truffin
Institut Français du Pétrole - R102 1&4 avenue Bois Préau 92852 Rueil Malmaison, France

Gilles Bruneaux
IFP Énergies nouvelles (IFPEN), 1-4 av. Bois Preau, 92852 Rueil-Malmaison, France

Franck Nicoud
Departement de Mathematiques CNRS UMR 5149 - CC51, University Montpellier II Place Eugene Bataillon 34095 Montpellier cedex 5, France

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.