著者

前田 太佳夫 鎌田 泰成 藤岡 秀康 鈴木 潤

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2007, no.2, pp.357-358, 2007-09-07

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In the actual wind turbine operated in the field, the wind direction changes with time. So, the turbine is operated with yaw miss alignment in most of time. To grasp the flow around wind turbine is important for evaluating the rotor performance. This paper shows the results of the velocity field measurement around a horizontal axis wind turbine in case various yawed operation. The experiments are carried out in a wind tunnel with 2.4m-diameter test rotor with 2-dimensional laser Doppler velocimeter. In the measurements the power curve and velocity distribution are measured for each yaw angle. Increasing of yaw angle, the power coefficient of the rotor decreases. The flow around turbine under yawed condition expands as non-yaw operation, but the flow pattern is not asymmetry with rotational axis. There is a large low-speed wake area in downstream of the blade placed upward. And flow around the blade placed downward has a large radial velocity component.