New Generation of Wind Scanners Developed by DTU
As the first in the world, the researchers have made measurements of eddy current in the so-called tip vortices with the new wind scanners.
Tip vortex are circular patterns of rotating air behind e.g. a wind turbine blade or an aircraft wing. Up until now, it has not been possible to measure vortex from the big turbines directly in the air behind the turbines, "explains Torben Krogh Mikkelsen, professor at DTU Wind Energy:
"At DTU Wind Energy, we have just performed the world's first measurements of the vortex currents in the so-called tip vortices which are formed from aircraft wings and wind turbine blades. The background is that we have just developed and tested a new generation of windscreens, which with 6-inch optics can now dissolve wind structures with up to 20 centimetres resolution measured from the ground behind the turbines."
New and better design of Turbine Blades
We have just recently succeeded at measuring the very small movements of the fast-moving air just behind the wind turbine spikes. There are many different speeds inside the swirls, also called tip vortices.
The measurements were performed at DTU's own test turbine, a V52 test turbine, which is on the field at DTU Risø Campus.
"The reason why it is interesting to measure tip vortices is that they are very important for how well the blade utilises the wind. The less energy devoted to these tip vortices, the better the production of electricity and hence the turbine economy, "explains Torben Krogh Mikkelsen.
There are clear indications that the new wind scanner based measurement activity, in conjunction with the detailed CFD calculation programs of tip vortices and wake currents, could lead to new and better-designed wind turbine blades.
DNV-GL has awarded Nabrawind with the Design Evaluation Conformity Statement for the first Nabralift Self-Erecting tower design, that was prototyped last summer in Eslava (Spain), with a total hub height of 160m.
- Agreement signed with Future Wind includes five years of testing and 15 years of service
- Installation of Haliade-X 12 MW will take place during summer 2019
Ingeteam is participating in the first bottom-fixed foundation offshore wind turbine prototype to be installed in Spain and the first of its kind in southern Europe.