Effect of Geometric Uncertainties on the Aerodynamic Characteristic of Offshore Wind Turbine Blades

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Ernst, Benedikt; Schmitt, Henning; Seume, Joerg R.: Effect of Geometric Uncertainties on the Aerodynamic Characteristic of Offshore Wind Turbine Blades. In: Journal of Physics Conference Series 534 (2014) , 12033. DOI: http://dx.doi.org/10.1088/1742-6596/555/1/012033

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/411

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Sum total of downloads: 204




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Abstract: 
Offshore wind turbines operate in a complex unsteady flow environment which causes unsteady aerodynamic loads. The unsteady flow environment is characterized by a high degree of uncertainty. In addition, geometry variations and material imperfections also cause uncertainties in the design process. Probabilistic design methods consider these uncertainties in order to reach acceptable reliability and safety levels for offshore wind turbines. Variations of the rotor blade geometry influence the aerodynamic loads which also affect the reliability of other wind turbine components. Therefore, the present paper is dealing with geometric uncertainties of the rotor blades. These can arise from manufacturing tolerances and operational wear of the blades. First, the effect of geometry variations of wind turbine airfoils on the lift and drag coefficients are investigated using a Latin hypercube sampling. Then, the resulting effects on the performance and the blade loads of an offshore wind turbine are analyzed. The variations of the airfoil geometry lead to a significant scatter of the lift and drag coefficients which also affects the damage-equivalent flapwise bending moments. In contrast to that, the effects on the power and the annual energy production are almost negligible with regard to the assumptions made.
License of this version: CC BY 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:Fakultät für Maschinenbau

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pos. country downloads
total perc.
1 image of flag of Germany Germany 176 86.27%
2 image of flag of Greece Greece 4 1.96%
3 image of flag of China China 4 1.96%
4 image of flag of United States United States 2 0.98%
5 image of flag of Russian Federation Russian Federation 2 0.98%
6 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 2 0.98%
7 image of flag of Denmark Denmark 2 0.98%
8 image of flag of Poland Poland 1 0.49%
9 image of flag of Netherlands Netherlands 1 0.49%
10 image of flag of Moldova, Republic of Moldova, Republic of 1 0.49%
    other countries 9 4.41%

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