University of the Ryukyus · Faculty of Engineering · 准教授

Research keywordssmall wind turbines・variable-pitch control・thin airfoil blades・turbine generator design・LQG control・aerodynamic performance・Okinawa wind conditions・renewable energy engineering

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• 乱流モデル無利用による水平軸風車特性の数値解析2015 · In the design for a wind turbine, the validation of the numerical computation result is almost carried out by the comparisonwith the wind tunnel experiment. However, the Reynolds number of the wind tunnel experiment is low and the flowdoes not become turbulence fully developed on a leading edge of wind turbine blade. Therefore, the transition area fromlaminar to turbulence becomes wide under the conditions, and the separation point is difficult to predict using the turbulencemodels. The prediction precision extremely decreases in the tip speed ratios less than a maximum power point. This studycarries out the unsteady calculation without and with turbulence models for a 3-blades horizontal axis wind turbine. Thevalidation of the calculations is performed by comparing with the experimental results. The power coefficients calculatedwithout turbulence models are in agreement with the experimental data for the high tip speed ratio heiger than 5.
• 2次元CFDとBEMを用いた風車特性の数値解析2013 · 二見昌寛，鈴木正己，天久和正
• 数値流体計算によるサボニウス風車まわりの流れ2013 · 鈴木正己，天久和正，二見昌寛
• 100kW風車の久米島実証試験について2013 · 藤井直樹，天久和正，鈴木正己，二見昌寛

• 風力発電システムにおける風況および風車性能予測統合による運転制御方法の構築2012 · 基盤研究(C)
• 強風域特化型風力発電システムに対するダブルピッチ失速制御機構の開発2010 · 基盤研究(C)
• 風力エネルギーを用いた離島用海水淡水化システムの開発2005 · 若手研究(B)
• 小形風車用ブレードの開発

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