会議発表論文 風車後流に対する翼端渦放出周期の影響

篠崎, 陽介  ,  田辺, 安忠  ,  青山, 剛史  ,  松尾, 裕一  ,  荒川, 忠一  ,  飯田, 誠  ,  Shinozaki, Yosuke  ,  Tanabe, Yasutada  ,  Aoyama, Takashi  ,  Matsuo, Yuichi  ,  Arakawa, Chuichi  ,  Iida, Makoto

内容記述
The purpose of this study is to understand the effect of release frequency of tip vortices which are shed from blade tips on a wind turbine wake. In wind farms, wind turbines are installed collectively and that results in a reduction of power generation. This problem requires proper designs of wind farms and knowledge about a wind turbine wake. Recent studies have revealed that tip vortices have a strong influence on wind turbine wakes. In this study, wakes from Mie University wind turbine of varying operating conditions are calculated by using Computational Fluid Dynamics (CFD), and energy transitions in the wind turbine wakes are examined. In the calculations, release frequencies of tip vortices are changed by changing tip speed ratio and the number of blades. The CFD results show the same trend of kinetic energy transition when the vortex release frequency is close. And the CFD results also show that when vortex release frequency becomes higher, a minimum value of energy becomes smaller and energy recovery rate becomes larger. This tendency is considered to be caused by the fact that when the frequency becomes higher, the interval between the vortices becomes narrower and the barrier effect which restrains momentum exchange between a wake and a mainstream becomes greater.
会議情報: 第49回流体力学講演会/第35回航空宇宙数値シミュレーション技術シンポジウム (2017年6月28日-37日. 国際オリンピック記念青少年総合センター), 渋谷区, 東京
形態: カラー図版あり
Meeting Information: 49th Fluid Dynamics Conference /the 35th Aerospace Numerical Simulation Symposium (June 28-30, 2017. National Olympics Memorial Youth Center), Shibuya-ku, Tokyo, Japan
Physical characteristics: Original contains color illustrations
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https://repository.exst.jaxa.jp/dspace/bitstream/a-is/865292/1/AA1730011007.pdf

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