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Comparison of measured and calculated sound pressure levels around a large horizontal axis wind turbine generatorResults are reported from a large number of simultaneous acoustic measurements around a large horizontal axis downwind configuration wind turbine generator. In addition, comparisons are made between measurements and calculations of both the discrete frequency rotational harmonics and the broad band noise components. Sound pressure time histories and noise radiation patterns as well as narrow band and broadband noise spectra are presented for a range of operating conditions. The data are useful for purposes of environmental impact assessment.
Document ID
Document Type
Technical Memorandum (TM)
Shepherd, Kevin P.
(NASA Langley Research Center Hampton, VA, United States)
Willshire, William L., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Hubbard, Harvey H.
(Planning Research Corp. Hampton, VA., United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1989
Subject Category
Report/Patent Number
NAS 1.15:100654
Funding Number(s)
PROJECT: RTOP 535-03-11-03
Distribution Limits
Work of the US Gov. Public Use Permitted.

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NameType 19890013899.pdf STI