Detailed analysis of the wake and free-flow characteristics at the Goodnoe Hills MOD-2 site
Conference
·
OSTI ID:5432280
Wind data collected on meteorological towers at the Goodnoe Hills MOD-2 wind turbine site were analyzed to characterize the free wind turbine wakes over the site. Free-flow characteristics examined were the variability of wind speed and turbulence intensity across the site as a function of wind direction. Scattered areas of trees upwind of the site caused pronounced variations in the wind flow over the site. A substantial increase in the turbulence, as well as a considerable decrease in the mean wind speed, was observed when a tower was downwind of the trees. Wind turbine wake characteristics analyzed included the average velocity deficits, wake turbulence, and the vertical profile of the wake. Wake behavior downwind of the turbines was analyzed at distances from 2 to 10 rotor diameters (D). The relationship between velocity deficit and downwind distance was surprisingly linear. Largest deficits were at low wind speeds and low turbulence intensities. Wake turbulence was greatest along the flanks of the wake, and the vertical variation of deficits was greater below hub height than above. 1 ref., 6 figs.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- Sponsoring Organization:
- DOE/CE
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 5432280
- Report Number(s):
- PNL-SA-17250; CONF-890981--4; ON: DE90002725
- Country of Publication:
- United States
- Language:
- English
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