Recent Development of Non-Linear Aeroacoustic Model for Wind Turbine Computations

Wen Zhong Shen, Jess Michelsen, Jens Nørkær Sørensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

A numerical algorithm for simulation of acoustic noise generation, based on collocated grids, has been developed.The approach, that was originally developed using a viscous/inviscid decomposition technique, involved two steps comprising a viscous incompressible flow part and an inviscid acoustic part. On collocated grids the inviscid solution is found to be mesh dependent due to unavoidable extrapolations of the acoustic pressure and density at walls, differing from the case on staggered grid where no extrapolation is needed. The situation is most pronounced when a sharp body is considered.A viscous acoustic algorithm is proposed to overcome the difficulty. The model is currently applied to the problem of an airfoil exposed to a gust and results are compared to the numerical results of Lockard and Morris [AIAA J. 36(6) (1998) 907].
Original languageEnglish
Title of host publicationProc. European Wind Energy Conference & Exhibition
PublisherEuropean Wind Energy Association (EWEA)
Publication date2003
EditionCD-ROM
Publication statusPublished - 2003
Event2003 European Wind Energy Conference and Exhibition - Madrid, Spain
Duration: 16 Jun 200319 Jun 2003

Workshop

Workshop2003 European Wind Energy Conference and Exhibition
Country/TerritorySpain
CityMadrid
Period16/06/200319/06/2003

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