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Wake Measurements of a Multi-MW Wind Turbine with Coherent Long-Range Pulsed Doppler Wind Lidar
| Content Provider | Semantic Scholar |
|---|---|
| Author | Käsler, Yvonne Rahm, Stephan Simmet, Rudolf Kühn, Martin |
| Copyright Year | 2010 |
| Abstract | Long-range Doppler wind light detection and ranging (lidar) measurements at a wind turbine were carried out for the first time. The turbine was of the type Areva M5000 and is located at a site near the coastline in Bremerhaven, in the northern part of Germany. This wind turbine is the prototype for the German offshore test site ‘‘alpha ventus’’ and has a rated power of 5 MW. Information about the ambient wind field before and after this multimegawatt wind turbine was obtained. In this paper the measurement technique is discussed and the results of measurements in the diurnal layer and in the stable nocturnal boundary layer are shown. The main focus of this work is to determine the reduction of the wind speed at certain distances downstream from the rotor. 1. Measurement technique Lidar is a remote sensing technique that transmits al aser beam into the atmosphere and the backscattered light is detected. The pulsed Doppler wind lidar, which was used for the measurements in Bremerhaven, Germany, takes advantage of the fact that the center frequency of the received laser pulses is shifted compared to the outgoing pulses because of the Doppler effect, which occurs from backscattering on moving particles. This shift in frequency provides information about the line-of-sight (LOS) component (component in beam direction) of the wind vector. The Doppler lidar of the |
| Starting Page | 1529 |
| Ending Page | 1532 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1175/2010JTECHA1483.1 |
| Alternate Webpage(s) | https://elib.dlr.de/65278/1/2010JTECHA1483.pdf |
| Alternate Webpage(s) | https://doi.org/10.1175/2010JTECHA1483.1 |
| Volume Number | 27 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
