Conference Paper 風車翼端渦崩壊過程の周速比特性論

木村, 桂大  ,  荒川, 忠一  ,  飯田, 誠  ,  田辺, 安忠  ,  青山, 剛史  ,  松尾, 裕一  ,  Kimura, Keita  ,  Arakawa, Chuichi  ,  Iida, Makoto  ,  Tanabe, Yasutada  ,  Aoyama, Takashi  ,  Matsuo, Yuichi

The wake behind a wind turbine can decrease the power generated by wind turbine farther downstream because tip vortices impedes recovery of velocity inside the wind turbine wake. From the viewpoint of cost effectiveness, collective installations of wind turbines are desired to reduce costs for maintenance and power transmission lines. However, the interference of wake makes it difficult to implement collective installations. This paper discusses about the characteristics of tip vortex in wind turbine wake via the use of Computational Fluid Dynamics (CFD), focusing on the dependency of tip speed ratio (TSR). TSR is an operational parameter of wind turbine and defined as the ratio of tip speed to inflow speed. It is important to assess the influence of TSR to the wake structure because it often changes in an operational wind turbine. In this work, CFD solver rFlow3D is used for capturing the characteristics of vortices and the velocity distributions in wind turbine wake. The CFD results are validated by comparing with the Model Experiments in Controlled Conditions (MEXICO) experiments. The tip vortices in wake region are clearly visualized, then it is found that TSR can change the distribution of vortices and the timing of vortex breakdown, which influences the velocity recovery in wake region.
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-38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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