3D load estimation on a horizontal axis wind turbine using SPIV
Article first published online: 11 AUG 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Volume 17, Issue 11, pages 1645–1657, November 2014
How to Cite
2014), Dampening variations in wind power generation—the effect of optimizing geographic location of generating sites, Wind Energ., 17, pages 1631–1643, doi: 10.1002/we.1658, and (
- Issue published online: 5 OCT 2014
- Article first published online: 11 AUG 2013
- Manuscript Accepted: 8 JUL 2013
- Manuscript Revised: 13 MAY 2013
- Manuscript Received: 15 AUG 2012
- load calculation;
- wind Energy;
- pressure calculation;
- near wake
The flow around the blade of a horizontal axis wind turbine wind tunnel model, operating at its optimal tip speed ratio in axial flow, has been investigated by means of stereoscopic particle image velocimetry (SPIV). The aim was to assess the possibility of measuring the loads impinged on the blade, using the acquired velocity field and its spatial derivatives. Thus, the three-dimensional (3D) velocity field and the pressure distribution surrounding the blade, as well as the aerodynamic loads, responsible for thrust and torque, were obtained with a non-intrusive method. The SPIV equipment was mounted on a traverse system and provided with phase-locked velocity planes perpendicular to the blade axis, scanning the blade from the root to the tip, at a fixed azimuthal position. The obtained velocity fields were used to estimate the pressure distribution and the aerodynamic loads on each plane, using a 3D formulation. Finally, these results were compared and discussed with similar results obtained computationally with a panel method model, showing good consistency. In the future, the proposed methodology could be used to study relevant topics such as active load control techniques, rotational augmentation, dynamic stall phenomena and the aerodynamics of small wind turbines operating at low Re numbers, among others. The processed and averaged flow fields from the experimental SPIV data are made available online to the reader. See appendix for description of the files. Copyright © 2013 John Wiley & Sons, Ltd.