Wind turbine rotor blade monitoring using digital image correlation: a comparison to aeroelastic simulations of a multi-megawatt wind turbine

The Science of Making Torque from Wind 2014

Winstroth, J.^1 ; Schoen, L.^2 ; Ernst, B.^1 ; Seume, J.R.^1

ForWind - Center for Wind Energy Research, Leibniz Universität Hannover, Institute of Turbomachinery and Fluid Dynamics (TFD), Appelstr. 9, 30167 Hanover, Germany^1

Senvion SE, Albert-Betz-Straße 1, 24783 Osterrönfeld, Germany^2

关键词: Aero-elastic simulations;    D. digital image correlation (DIC);    Digital image correlations;    Full-field measurement;    Lidar measurements;    Light detection and ranging systems;    Spatial and temporal resolutions;    Wind turbine rotors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012064/pdf
DOI  :  10.1088/1742-6596/524/1/012064

来源: IOP

【 摘 要 】

Optical full-field measurement methods such as Digital Image Correlation (DIC) provide a new opportunity for measuring deformations and vibrations with high spatial and temporal resolution. However, application to full-scale wind turbines is not trivial. Elaborate preparation of the experiment is vital and sophisticated post processing of the DIC results essential. In the present study, a rotor blade of a 3.2 MW wind turbine is equipped with a random black-and-white dot pattern at four different radial positions. Two cameras are located in front of the wind turbine and the response of the rotor blade is monitored using DIC for different turbine operations. In addition, a Light Detection and Ranging (LiDAR) system is used in order to measure the wind conditions. Wind fields are created based on the LiDAR measurements and used to perform aeroelastic simulations of the wind turbine by means of advanced multibody codes. The results from the optical DIC system appear plausible when checked against common and expected results. In addition, the comparison of relative out-ofplane blade deflections shows good agreement between DIC results and aeroelastic simulations.