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

Wen Zhong Shen; Jess Michelsen; Jens Nørkær Sørensen

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 proceeding › Article in proceedings › Research › peer-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 language	English
Title of host publication	Proc. European Wind Energy Conference & Exhibition
Publisher	European Wind Energy Association (EWEA)
Publication date	2003
Edition	CD-ROM
Publication status	Published - 2003
Event	2003 European Wind Energy Conference and Exhibition - Madrid, Spain Duration: 16 Jun 2003 → 19 Jun 2003

Workshop

Workshop	2003 European Wind Energy Conference and Exhibition
Country/Territory	Spain
City	Madrid
Period	16/06/2003 → 19/06/2003

Access to Document

http://www.ewea.org

OpenUrl availability

Full text

Cite this

@inproceedings{b909c6bb2b724108b911c9cd7915cd40,

title = "Recent Development of Non-Linear Aeroacoustic Model for Wind Turbine Computations",

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].",

author = "Shen, {Wen Zhong} and Jess Michelsen and S{\o}rensen, {Jens N{\o}rk{\ae}r}",

year = "2003",

language = "English",

booktitle = "Proc. European Wind Energy Conference & Exhibition",

publisher = "European Wind Energy Association (EWEA)",

edition = "CD-ROM",

note = "2003 European Wind Energy Conference and Exhibition, EWEC 2003 ; Conference date: 16-06-2003 Through 19-06-2003",

}

Recent Development of Non-Linear Aeroacoustic Model for Wind Turbine Computations. / Shen, Wen Zhong; Michelsen, Jess; Sørensen, Jens Nørkær.
Proc. European Wind Energy Conference & Exhibition. CD-ROM. ed. European Wind Energy Association (EWEA), 2003.

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Recent Development of Non-Linear Aeroacoustic Model for Wind Turbine Computations

AU - Shen, Wen Zhong

AU - Michelsen, Jess

AU - Sørensen, Jens Nørkær

PY - 2003

Y1 - 2003

N2 - 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].

AB - 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].

M3 - Article in proceedings

BT - Proc. European Wind Energy Conference & Exhibition

PB - European Wind Energy Association (EWEA)

T2 - 2003 European Wind Energy Conference and Exhibition

Y2 - 16 June 2003 through 19 June 2003

ER -

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

Abstract

Workshop

Access to Document

OpenUrl availability

Fingerprint

Cite this