Computationally efficient source grid selection and source interpolation in computational aeroacoustics applied to an axial fan

Andreas Wurzinger*, Manfred Kaltenbacher, Stefan Schoder

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.
Original languageEnglish
Title of host publicationProceedings Internoise 2021
Number of pages9
Publication statusAccepted/In press - 19 Apr 2021
EventInter-Noise 2021 - Washington DC, Virtuell, United States
Duration: 1 Aug 20215 Aug 2021

Conference

ConferenceInter-Noise 2021
CountryUnited States
CityVirtuell
Period1/08/215/08/21

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