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タイトル
和文: 
英文:A robust biomimetic blade design for micro wind turbines 
著者
和文: Teruaki Ikeda, 田中 博人, Ryosuke Yoshimura, Ryusuke Noda, Takeo Fujii, 劉 浩.  
英文: Teruaki Ikeda, Hiroto Tanaka, Ryosuke Yoshimura, Ryusuke Noda, Takeo Fujii, Hao Liu.  
言語 English 
掲載誌/書名
和文: 
英文:Renewable Energy 
巻, 号, ページ Vol. 125        pp. 155-165
出版年月 2018年2月20日 
出版者
和文: 
英文:Elsevier 
会議名称
和文: 
英文: 
開催地
和文: 
英文: 
公式リンク https://www.sciencedirect.com/science/article/pii/S0960148118302374
 
DOI https://doi.org/10.1016/j.renene.2018.02.093
アブストラクト Inspired by bird wings that enable robust aerodynamic force production and stable flight, we propose a biomimetic blade design for small wind turbines that is capable of achieving a high integral power coefficient, Cp, over a broad range of tip-speed ratios, l, and hence enhances robustness in aerodynamic performance. We first developed a basic blade design with bird-inspired flexed wing morphology and investigated its aerodynamic characteristics with computational fluid dynamics. Our results demonstrated that the swept-forward shaped portion proximal to wing root augmented Cp at smaller l, whereas the distal swept-backward shaped portion improved Cp at larger l. We further conducted a morphology optimization and developed an optimized flexion blade that is capable of achieving a remarkably improved Cp over a broad range of l. To evaluate the aerodynamic robustness under variable tip-speed ratios in an integral way, we here propose a new Robustness Index (Ri) and find that the optimizedflexion blade outperforms a conventional blade based on Blade Element Momentum Theory by 8.1%, indicating marked robustness in power output. Our results indicate that of great potential for wind turbines robustness-oriented biomimetic blade design can be a practical and effective methodology in wind-based sustainable energy harvesting.

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