Flow separations in the inlet of a recently constructed flow-through nacelle are studied by means of experiments and numerical simulations. First measurements in a low-speed wind tunnel at Re = 1.3 Mio. comprising oil film pictures and static surface pressure are used to validate time-averaged results of URANS simulations with a near-wall Reynolds stress model (RSM) based on an
-equation. The simulations are performed with the DLR-TAU solver in an angle-of-attack range up to the onset of inlet separations around
= 21.5°. Besides investigations on the role of transition, comparisons of experimental and numerical results show that both tested RSM capture the initial stage of stall in good agreement with the measurements.