Two turbomachinery test cases are investigated numerically within the scope of this paper. In the first test case, the effect of different operating points on the aerodynamic excitation of the wheel is investigated in three similar vaneless turbocharger turbines. Therefore, many URANS simulations at different operating conditions covering the entire operating map have been performed on high-fidelity models. The analysis of the evaluated excitation maps suggests similar forcing mechanisms. In the second test case, the complex flow field at partload conditions of an axial gas turbine diffuser with two different struts are investigated. The flow phenomena such as smooth wall separation and recirculation for example are predicted performing URANS and SBES simulations. By applying SBES as a scale resolving model, the agreement of the diffuser performance and flow characteristics with experimental data are improved depending on the operating point and strut geometry compared to an URANS approach.