Back to top
Reported by DTU Wind Energy on 21 December 2018

New Generation of Wind Scanners Developed by DTU

Researchers in the meteorological section at DTU Wind Energy have developed a new type of wind scanners. The new wind scanners can measure the vortex currents in the tip vortex.

(Courtesy of DTU Wind Energy)

Researchers at DTU Wind Energy have developed and tested a new generation of short-range wind scanners which with six-inch optics have a sufficiently high resolution to measure tip vortices from measurements behind the turbine from ground level.

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.

References

[1]

DTU Wind Energy. Press release - New Generation of Wind Scanners Developed by DTU. URL: http://www.dtu.dk/english/news/Nyhed?id=21486C47-1A16-45DA-B7F2-AFAD61E867E7. [Date Accessed: 21/12/2018].

Technology

16 Jan | Design Certificate of 160m Nabralift Self-Erecting Tower awarded by DNV-GL

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.

Technology

16 Jan | GE's Haliade-X 12 MW prototype to be installed in Rotterdam

  • 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

Technology

15 Jan | Ingeteam is participating in the project for the first offshore wind turbine in Spain

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.

Technology

08 Jan | The world’s first floating wind turbine gets extended life

UNITECH Offshore and Equinor have entered into an agreement that UNITECH will take over the Hywind Demo floating wind turbine outside Karmøy. The turbine will be renamed and used as an infrastructure for research projects, development of new technology, and within teaching and training.

Technology

07 Dec | Goodbye to the 4-Rotor Concept Turbine at Risø

The 4-Rotor Concept Turbine that was placed at DTU Risø Cam-pus is now dismantled. The testing of the concept is complete.

Technology

26 Oct | Danish research to strengthen the design of floating wind turbines

With an investment of DKK 15.8 million from the Danish Innovation Fond, researchers from DTU are, in collaboration with leading companies, optimizing the design of the floaters, which makes it possible to place offshore wind turbines on deep waters. 

Technology

12 Oct | 16,768 cores in the new super computer at DTU Wind

Far more complex calculations are required to achieve reliable knowledge about wind conditions. DTU Wind Energy is therefore bringing in a new supercomputer to ensure that the research remains at the cutting edge.

Technology

08 Oct | New wind turbine prototypes to be tested at Østerild and Høvsøre

Technical University of Denmark (DTU), who operates the national test centres for large wind turbines at Østerild and Høvsøre, have just completed the tender process for the rental of the new test stands, which have been established on the basis of Parliament’s decision for more test facilities in Denmark.