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Prediction of broadband noise from large horizontal axis wind turbine generatorsA method is presented for predicting the broadband noise spectra of large horizontal axis wind turbine generators. It includes contributions from such noise sources as the inflow turbulence to the rotor, the interactions between the turbulent boundary layers on the blade surfaces with their trailing edges and the wake due to a blunt trailing edge. The method is partly empirical and is based on acoustic measurements of large wind turbines and airfoil models. The predicted frequency spectra are compared with measured data from several machines including the MOD-OA, the MOD-2, the WTS-4 and the U.S. Wind-power Inc. machine. Also included is a broadband noise prediction for the proposed MOD-5B. The significance of the effects of machine size, power output, trailing edge bluntness and distance to the receiver is illustrated. Good agreement is obtained between the predicted and measured far field noise spectra.
Document ID
19850028742
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Grosveld, F. W.
(Bionetics Corp. Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Subject Category
Energy Production And Conversion
Report/Patent Number
AIAA PAPER 84-2357
Accession Number
85A10893
Funding Number(s)
CONTRACT_GRANT: NAS1-16978
Distribution Limits
Public
Copyright
Other

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