Thema: Modification of the SSG/LRR-ω RSM for turbulent boundary layers at adverse pressure gradient with separation using the new DLR VicToria experiment The prediction of turbulent boundary layer separation due to a smooth adverse pressure gradi-

The prediction of turbulent boundary layer separation due to a smooth adverse pressure gradient (APG) in the low-speed regime using RANS-based CFD is still associated with significant uncertainties. Well-defined and documented validation test cases with a thin separation bubble and at high Reynolds numbers relevant for the flow around aircraft wings are rare in the literature. Therefore within the DLR project VicToria a new boundary layer experiment was designed. The goals are (i) to establish a data base for the mean velocity and the Reynolds stresses in the APG region and in the separation region, (ii) to extend a recently proposed wall-law at APG (see [1]) towards separation, (iii) to establish the test case as a validation case for RANS and scale-resolving simulations, and (iv) to extend the recently proposed modification of the ω-equation for the SST k-ω model (see [1]) to the SSG/LRR-ω model and to calibrate this modification for the situation that the flow approaches separation. The experimental investigation was performed using the Atmospheric Windtunnel (AWM) at the UniBw in München. The measurements where performed at four reference velocities up to 35m/s. The geometry in the APG region is shown in figure 1.