Next Article in Journal
Modified Synchronous Reference Frame Based Shunt Active Power Filter with Fuzzy Logic Control Pulse Width Modulation Inverter
Previous Article in Journal
Techno-Economic Investigation of Solar Powered Electric Auto-Rickshaw for a Sustainable Transport System
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Energies 2017, 10(6), 757;

Wind Turbine Wake Mitigation through Blade Pitch Offset

Wind Engineering and Renewable Energy Laboratory (WIRE), School of Architecture, Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 7 March 2017 / Revised: 18 May 2017 / Accepted: 26 May 2017 / Published: 29 May 2017
(This article belongs to the Section Energy Fundamentals and Conversion)
Full-Text   |   PDF [3462 KB, uploaded 1 June 2017]   |  


The reduction in power output associated with complex turbine-wake interactions in wind farms necessitates the development of effective wake mitigation strategies. One approach to this end entails the downregulation of individual turbines from its maximum power point with the objective of optimizing the overall wind farm productivity. Downregulation via blade pitch offset has been of interest as a potential strategy, though the viability of this method is still not clear, especially in regard to its sensitivity to ambient turbulence. In this study, large-eddy simulations of a two-turbine arrangement, with the second turbine in the full wake of the first, were performed. The effects of varying the blade pitch angle of the upstream turbine on its wake characteristics, as well as the combined power of the two, were investigated. Of specific interest was the effect of turbulence intensity of the inflow on the efficacy of this method. Results showed enhanced wake recovery associated with pitching to stall, as opposed to pitching to feather, which delayed wake recovery. The increased wake recovery resulted in a noticeable increase in the power of the two-turbine configuration, only in conditions characterized by low turbulence in the incoming flow. Nevertheless, the low turbulence scenarios where the use of this method is favorable, are expected in realistic wind farms, suggesting its possible application for improved power generation. View Full-Text
Keywords: large-eddy simulation (LES); wind turbine wake; atmospheric boundary layer (ABL); rotational actuator disk model (ADM-R); pitch offset large-eddy simulation (LES); wind turbine wake; atmospheric boundary layer (ABL); rotational actuator disk model (ADM-R); pitch offset

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Dilip, D.; Porté-Agel, F. Wind Turbine Wake Mitigation through Blade Pitch Offset. Energies 2017, 10, 757.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top