Abdallah, Imad1; Natarajan, Anand1; Sørensen, John Dalsgaard1
1 Department of Wind Energy, Technical University of Denmark2 Wind Turbines, Department of Wind Energy, Technical University of Denmark
The sources contributing to uncertainty in a wind turbine blade static airfoil data include wind tunnel testing, CFD calculations, 3D rotational corrections based on CFD or empirical models, surface roughness corrections, Reynolds number corrections, expansion to the full 360-degree angle of attack range, validation by full scale measurements, and geometric distortions of the blade during manufacturing and under loading. In this paper a stochastic model of the static airfoil data is proposed to supplement the prediction of extreme loads effects for large wind turbines. It is shown that the uncertainty in airfoil data can have a significant impact on the prediction of extreme loads effects depending on the component, and the correlation along the span of the blade.
Safety, Reliability, Risk and Life-cycle Performance of Structures and Infrastructures - Proceedings of 11th International Conference on Structural Safety and Reliability, 2013, p. 215-222
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11th international conference on Structural Safety & Reliability Conference, 2013