EAA Benchmark for an axial fan

We present detailed numerical results of the EAA benchmark case of an axial fan. Thereby, we aim to present the whole aeroacoustic simulation process for a successful computation of the flow and acoustic signature of an axial fan: (1) Meshing approach for the CFD simulation; (2) Turbulence modeling; (3) CFD convergence study; (4) Evaluation of the most significant flow results for a subsequent acoustic simulation; (5) Computational domain and meshing for the simulation of the acoustic field; (6) Acoustic source term evaluation, possible truncation and interpolation from the CFD to the acoustic grid; (7) Acoustic field computation and evaluation of its most relevant physical quantities. For the hybrid aeroacoustic computation we apply a detached eddy simulation (DES) to model the turbulent flow and the perturbed convective wave equation for the computation of the radiated sound.