Rotationally sampled wind characteristics and correlations with MOD-OA wind turbine response

Technical Report · Sat Sep 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/6596575· OSTI ID:6596575

George, R L; Connell, J R

This report presents results of a comprehensive wind and wind turbine measurement program: the Clayton, New Mexico, vertical plane array/MOD-OA project. In this experiment, the turbulent wind was measured for a large array of fixed anemometers located two blade diameters upwind of a 200-kW horizontal-axis wind turbine (HAWT). Simultaneously, key wind turbine response parameters were also measured. The first of two major objectives of this experiment was to determine the turbulent wind, rotationally sampled to emulate the motion of the wind turbine blade, for the range of different wind speeds and stability classes actually experienced by the wind turbine. The second major objective was to correlate this rotationally sampled wind with the wind turbine blade stress and power, in order to assess the usefulness of the wind measurements for wind turbine loads testing a prediction. Time series of rotationally sampled winds and wind turbine blade bending moments and power were converted to frequency spectra using Fourier transform techniques. These spectra were used as the basis for both qualitative and quantitative comparisons among the various cases. A quantitative comparison between the rotationally sampled wind input and blade bending response was made, using the Fourier spectra to estimate the blade transfer function. These transfer functions were then used to calculate an approximate damping coefficient for the MOD-OA fiberglass blade.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6596575
• Report Number(s): PNL-5238; ON: DE85001770
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602 -- Wind Energy Engineering-- Turbine Design & Operation
170604* -- Wind Energy Engineering-- Site Characteristics
BENDING
FEDERAL REGION VI
FOURIER TRANSFORMATION
INTEGRAL TRANSFORMATIONS
MACHINERY
NEW MEXICO
NORTH AMERICA
POWER
SAMPLING
SPECTRA
STRESSES
TRANSFORMATIONS
TURBINES
TURBOMACHINERY
TURBULENCE
USA
WIND
WIND TURBINES