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Sound measurements and observations of the mod-oa wind turbine generator
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Shepherd, K. P. Hubbard, H. H. |
| Copyright Year | 1982 |
| Description | Sound measurements are reported for a wind velocity of about 5 m/s and a power output of about 70 kW. Both broadband and narrowband data were obtained for a range of distances and azimuth angles from the machine. Both discrete frequency and broadband components were identified. Loading harmonics at multiples of the blade passage frequency and electrical generator harmonics at multiples of the shaft speed dominated the spectrum below 100 Hz. The 10,000 Hz peak is believed to be of mechanical origin in the nacelle and the other arises from blade aerodynamic sources. Aural detection distances of about 525 m upwind and 850 downwind were observed. |
| File Size | 593277 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19820013156 |
| Archival Resource Key | ark:/13960/t4jm7388d |
| Language | English |
| Publisher Date | 1982-02-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Effective Perceived Noise Levels Acoustic Measurement Acoustic Propagation Bandwidth Frequency Measurement Wind Turbines Windpowered Generators Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
