Wake of the MOD-0A1 wind turbine at two rotor diameters downwind on December 3, 1981

Technical Report · Mon Nov 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/6665635· OSTI ID:6665635

Connell, J R; George, R L

The wake of the MOD-0A1 wind turbine at Clayton, New Mexico has been measured using a vertical plane array of anemometers in a crosswind plane at a distance of two rotor diameters directly downwind of the turbine. Rotor blade vortices were well mixed into the wake turbulence and were not separately detectable. Wake swirl about the along-wind axis had a value not greater than 0.025 rad/s. Extra turbulence energy existed in the edge of the wake at a frequency of about n=0.025 Hz. The cross-wake plane analyses of wind speeds revealed a nearly circular inner portion and a strongly elliptical portion. The elliptical portion major axis was horizontal. An estimate of the average rate of reenergizing of the wake, using measurements of mean wind energy flow and turbine power, suggests that entrainment with ambient air may have been rapid. Some wake characteristics were compared with the corresponding ones for several simple wake models based upon concepts of mixing of ambient air into a wake or an equivalent coaxial jet. (LEW)

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6665635
• Report Number(s): PNL-4210; ON: DE83003305
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
AIR FLOW
DATA
ENTRAINMENT
EXPERIMENTAL DATA
FEDERAL REGION VI
FLUID FLOW
GAS FLOW
INFORMATION
MACHINERY
MATHEMATICAL MODELS
NEW MEXICO
NORTH AMERICA
NUMERICAL DATA
TURBINES
TURBOMACHINERY
TURBULENCE
USA
VELOCITY
WIND TURBINES