The noise generation of an axial fan is mainly caused by flow-induced sound. For this fan case,a hybrid approach separating flow and acoustics is suitable due to its low Mach number flow.Such a computationally efficient hybrid workflow requires a robust conservative mesh-to-mesh transformation of the acoustic sources as well as a proper mesh refinement to guarantee good convergence behavior.In doing so, we focus on the mesh-to-mesh data interpolation. Two interpolation algorithms of different complexity are compared and applied to the aeroacoustic computation of an axial fan.The basic cell-centroid approach is generally suited for fine computational acoustic (CA) meshes, while the more complex cut-volume method yields better results for coarse acoustic meshes. Although the cell-centroid interpolation scheme produces source artifacts inside the propagation domain, a grid study using the grid convergence index shows monotonic convergence behavior for both interpolation methods.
|Title of host publication||Proceedings Internoise 2021|
|Number of pages||9|
|Publication status||Accepted/In press - 19 Apr 2021|
|Event||Inter-Noise 2021 - Washington DC, Virtuell, United States|
Duration: 1 Aug 2021 → 5 Aug 2021
|Period||1/08/21 → 5/08/21|