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

Abstract

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.more » These transfer functions were then used to calculate an approximate damping coefficient for the MOD-OA fiberglass blade.« less

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
OSTI Identifier:
6596575
Report Number(s):
PNL-5238
ON: DE85001770
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Resource Relation:
Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; WIND; SAMPLING; TURBULENCE; WIND TURBINES; POWER; STRESSES; BENDING; FOURIER TRANSFORMATION; NEW MEXICO; SPECTRA; FEDERAL REGION VI; INTEGRAL TRANSFORMATIONS; MACHINERY; NORTH AMERICA; TRANSFORMATIONS; TURBINES; TURBOMACHINERY; USA; 170604* - Wind Energy Engineering- Site Characteristics; 170602 - Wind Energy Engineering- Turbine Design & Operation

Citation Formats

George, R L, and Connell, J R. Rotationally sampled wind characteristics and correlations with MOD-OA wind turbine response. United States: N. p., 1984. Web. doi:10.2172/6596575.
George, R L, & Connell, J R. Rotationally sampled wind characteristics and correlations with MOD-OA wind turbine response. United States. https://doi.org/10.2172/6596575
George, R L, and Connell, J R. 1984. "Rotationally sampled wind characteristics and correlations with MOD-OA wind turbine response". United States. https://doi.org/10.2172/6596575. https://www.osti.gov/servlets/purl/6596575.
@article{osti_6596575,
title = {Rotationally sampled wind characteristics and correlations with MOD-OA wind turbine response},
author = {George, R L and Connell, J R},
abstractNote = {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.},
doi = {10.2172/6596575},
url = {https://www.osti.gov/biblio/6596575}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Sep 01 00:00:00 EDT 1984},
month = {Sat Sep 01 00:00:00 EDT 1984}
}