Behavior of the blade tip vortices of a wind turbine equipped with a brimmed-diffuser shroud

Shuhei Takahashi, Yuya Hata, Yuji Ohya, Takashi Karasudani, Takanori Uchida

研究成果: ジャーナルへの寄稿学術誌査読

39 被引用数 (Scopus)

抄録

To clarify the behavior of the blade tip vortices of a wind turbine equipped with a brimmed-diffuser shroud, called a "Wind-Lens turbine", we conducted a three-dimensional numerical simulation using a large eddy simulation (LES). Since this unique wind turbine consists of not only rotating blades but also a diffuser shroud with a broad-ring brim at the exit periphery, the flow field around the turbine is highly complex and unsteady. Previously, our research group conducted numerical simulations using an actuator-disc approximation, in which the rotating blades were simply modeled as an externalforce on the fluid. Therefore, the detailed flow patterns around the rotating blades and the shroud, including the blade tip vortices, could not be simulated. Instead of an actuator-disc approximation, we used a moving boundary technique in the present CFD simulation to simulate the flow around a rotating blade in order to focus especially on blade tip vortices. The simulation results showed a pair ofvortices consisting of a blade tip vortex and a counter-rotating vortex which was generated between the blade tip and the inner surface of the diffuser. Since these vortices interacted with each other, the blade tip vortex was weakened by the counter-rotating vortex. The results showed good agreement with past wind tunnel experiments.

本文言語英語
ページ(範囲)5229-5242
ページ数14
ジャーナルEnergies
5
12
DOI
出版ステータス出版済み - 12月 2012

!!!All Science Journal Classification (ASJC) codes

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • エネルギー(その他)
  • 制御と最適化
  • 電子工学および電気工学

フィンガープリント

「Behavior of the blade tip vortices of a wind turbine equipped with a brimmed-diffuser shroud」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル