This study investigates the impact of turbulence grid configurations on generating controlled inflow turbulence in the Acoustic Wind Tunnel Braunschweig (AWB). Turbulence grids of varying bar sizes and spacings were used, allowing an analysis of the resulting turbulence intensities and flow characteristics over a range of turbulence levels and Reynolds numbers. The present study combines high-resolution Large Eddy Simulations (LES) with cross-wire velocity measurements to characterize the turbulence intensity and isotropy downstream of the grid and around an airfoil section. Findings highlight the influence of grid design on turbulence structure, with denser grids producing more isotropic turbulence, whereas sparser grids produce anisotropy.