Flow interaction of diffuser augmented wind turbines

U. Göltenbott, Y. Ohya, S. Yoshida, P. Jamieson

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)


Up-scaling of wind turbines has been a major trend in order to reduce the cost of energy generation from the wind. Recent studies however show that for a given technology, the cost always rises with upscaling, notably due to the increased mass of the system. To reach capacities beyond 10 MW, multi-rotor systems (MRS) have promising advantages. On the other hand, diffuser augmented wind turbines (DAWTs) can significantly increase the performance of the rotor. Up to now, diffuser augmentation has only been applied to single small wind turbines. In the present research, DAWTs are used in a multi-rotor system. In wind tunnel experiments, the aerodynamics of two and three DAWTs, spaced in close vicinity in the same plane normal to a uniform flow, have been analysed. Power increases of up to 5% and 9% for the two and three rotor configurations are respectively achieved in comparison to a stand-alone turbine. The physical dynamics of the flows are analysed on the basis of the results obtained with a stand-alone turbine.

Original languageEnglish
Article number022038
JournalJournal of Physics: Conference Series
Issue number2
Publication statusPublished - Oct 3 2016
EventScience of Making Torque from Wind, TORQUE 2016 - Munich, Germany
Duration: Oct 5 2016Oct 7 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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