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A Particle Image Velocimetry study of dual-rotor counter-rotating wind turbine near wake

Hollands, EO.; He, C.; Gan, L.

A Particle Image Velocimetry study of dual-rotor counter-rotating wind turbine near wake Thumbnail


EO. Hollands

C. He


This experimental work studied the flow characteristics in the near wake region behind dual-rotor wind turbines using two-dimensional particle image velocimetry. Two auxiliary rotors of 50% and 80% scale of the main rotor were installed upwind and operated in counter-rotating condition, which are compared to the conventional single rotor turbine. In all the three configurations, a constant Reynolds number 9.5×104 was applied and all the rotors operated at a fixed tip speed ratio of 3.46. The mean and phase averaged velocity fields were investigated together with the turbulence kinetic energy. It was found that the two auxiliary rotors do not result in a significantly different wake flow property. The configuration implementing the 50% auxiliary rotor sees a slightly better wake characteristics, in terms of weaker main rotor tip vortices and a counter-rotating swirling shear region at the mid-span behind the main rotor. The decay rates of the peak vorticity of the main rotor tip vortices and their circulation are found to follow an exponential manner.


Hollands, E., He, C., & Gan, L. (2020). A Particle Image Velocimetry study of dual-rotor counter-rotating wind turbine near wake. Journal of Visualization, 23(3), 425-435.

Journal Article Type Article
Acceptance Date Oct 3, 2019
Online Publication Date Mar 31, 2020
Publication Date Jun 30, 2020
Deposit Date Oct 27, 2019
Publicly Available Date Apr 23, 2020
Journal Journal of Visualization
Print ISSN 1343-8875
Electronic ISSN 1875-8975
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 23
Issue 3
Pages 425-435


Published Journal Article (Advance online version) (2.2 Mb)

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