Wind Turbine and Wind Farm Wakes
Title: Wind Turbine and Wind Farm Wakes
SNIC Project: SNIC 2014/8-5
Project Type: SNAC Large
Principal Investigator: Stefan Ivanell <>
Affiliation: Uppsala University Campus Gotalnd
Duration: 2014-07-01 – 2015-07-01
Classification: 20306 20304 20301


Our group at Uppsala University Campus Gotland has been performing research on wind turbine wakes for about a decade. We are interested in improving knowledge about the fundamentals of wake dynamics, validating and improving wind turbine aerodynamics models, as well as studying more practical problems regarding for example the optimization of large wind farms. In the latter case, we are aiming at increasing the production while minimizing turbine loadings. The amount of wind power development in Europe has reached a level where it has become important to investigate the effect of wind farms on each other; this is also one of the main issues we are interested in. It is important to mention that our participation to two annexes from the International Energy Agency has made possible an access to experimental data, which is a key issue for most of the studies we are performing. It is also done for our group through a collaboration with École de Technologie Supérieure in Montréal, Canada, who has had access to data acquired in a wind tunnel on actuator discs. The group also established a close collaboration with The Technical University of Denmark (DTU) which have resulted in a very fruitful collaboration. Our calculations are performed using the code EllipSys3D, which makes use of Large-Eddy Simulations. Although we are using the actuator disc and actuator line representations of the turbine rotors, that have proven to be efficient ways of reducing computational requirements, such calculations remain quite demanding. The amount of projects we are involved in, as well as the increase in the number of researchers in our group, have resulted in the last months in an important increase in the computational resources that are needed by our group to fulfill its research goals. The present application summarizes in detail work that has been performed by our group up to now using SNIC resources, as well the projects that are planned for in the next year. The fact that an application that was made by our group last October was not fully granted explains why some of the projects suggested in this previous application are mentioned in the current one as well. Our group is in a very good position to successfully perform different calculations whose implications are important both for an increase in the fundamental understanding of wake behavior as well as more practical information that can be very useful for the industry. We acknowledge SNIC for the work that we could perform up to now, and we hope that the present demand will result in a positive outcome, allowing us to fulfill the projects we have planned for.