著者

佐々木 加津也 杉野 賢治 前田 太佳夫

出版者

一般社団法人 日本風力エネルギー学会

雑誌

風力エネルギー利用シンポジウム (ISSN:18844588)

巻号頁・発行日

vol.27, pp.161-164, 2005 (Released:2011-07-11)

参考文献数

1

著者

清水 幸丸 前田 太佳夫 鎌田 泰成 近藤 和久 朝場 一敬

出版者

一般社団法人 日本風力エネルギー学会

雑誌

風力エネルギー利用シンポジウム (ISSN:18844588)

巻号頁・発行日

vol.22, pp.85-87, 2000 (Released:2011-07-11)

参考文献数

2

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.

著者

前田 太佳夫 鎌田 泰成 酒井 雄作 高原 直樹

出版者

日本機械学会

雑誌

日本機械学會論文集. B編 = Transactions of the Japan Society of Mechanical Engineers. B (ISSN:03875016)

巻号頁・発行日

vol.71, no.701, pp.171-176, 2005-01-25

参考文献数

5

被引用文献数

5

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This paper describes the measurement of the flow field around rotor blade. Three-bladed upwind rotor was tested in an open jet type wind tunnel. The rotor has a diameter of 2.4m. Flow field around rotor blade was measured with the use of two-dimensional LDV. The flow field was measured in x-y plane and z-y plane. The circulation around the blade sections were calculated by flow vectors around the rotor blade. The velocity vectors at optimum operation show a smooth flow around the blade and the bound vortex around blade cross-section seems to be persistent. On the other hand, the velocity vectors at stall condition demonstrate significant fluctuations in the near wake and separation on the blade suction side was observed. The circulation around blade span-wise section was calculated at the certain control volume. By the observation of flow field and calculated results of circulation, it seems that the flow is separated at the blade from middle-span region to tip region at stall condition. No separation was observed at the blade root region.