The relationship between vortex pairings and velocity deficit recovery in a wind turbine wake

Keita Kimura, Yasutada Tanabe, Takashi Aoyama, Yuichi Matsuo, Makoto Iida

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The rapid recovery of a velocity deficit in a wind turbine wake was studied using unsteady simulations of Navier-Stokes equations. The results indicate that as the tip speed ratio (TSR) increased, the velocity deficit in the far-wake region was reduced while the deficit in the near-wake increased. This was caused in part by the difference of tip vortex behaviors; as the TSR increases, the distance between vortices narrows. This narrow interval can accelerate the pairing of vortex sheets, producing larger structures and accelerating the recovery of the velocity deficit.

Original languageEnglish
Title of host publicationProgress in Turbulence VIII - Proceedings of the iTi Conference in Turbulence 2018
EditorsRamis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack
PublisherSpringer Science and Business Media, LLC
Pages323-329
Number of pages7
ISBN (Print)9783030221959
DOIs
Publication statusPublished - 2019
Event8th iTi Conference on Turbulence, 2018 - Bertinoro, Italy
Duration: 3 Sep 20187 Sep 2018

Publication series

NameSpringer Proceedings in Physics
Volume226
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference8th iTi Conference on Turbulence, 2018
CountryItaly
CityBertinoro
Period3/09/187/09/18

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