Large Eddy Simulation and Measurements of Turbulent Rotor-Stator Flows

Comparisons between large eddy simulation (LES) and velocity measurements have been performed for the turbulent flow in a real shrouded rotor-stator configuration. To investigate turbulent flow regimes, LES numerical results (Spectral Vanishing Viscosity technique) and experimental data have been favourably compared for a large range of rotational Reynolds number 10$^{5}\le $Re=$\Omega $b$^{2}$/$\nu \le $10$^{6}$ in an annular cavity of curvature parameter Rm = (b + a)/(b- a) = 1$.$8 and of aspect ratio G = (b-a)/h = 5, where a and b are respectively the inner and outer radii of the rotating disk and $h $is the interdisk spacing. All the characteristics of 3D turbulent boundary layers have been found and coherent structures have been shown under the form of annuli or spiral arms.