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ラジエター ファン オ カツヨウ シタ コガタ カザグルマ ノ セイノウ トクセイ ニ オヨボ ス フウシャ ジョウリュウ ノ シュクショウカン・カクダイカン ノ コウカ ラジエターファンを活用した小型風車の性能特性に及ぼす風車上流の縮小管・拡大管の効果 Effects of Nozzles and Diffusers at Upstream of a Small Wind Turbine on the Characteristics of the Wind Turbine 平野, 公孝 5540 ヒラノ, キミタカ Hirano, Kimitaka 菊地, 正憲 5539 キクチ, マサノリ Kikuchi, Masanori 弓削, 俊夫 5740 ユゲ, トシオ 大川, 直泰 14205 オオカワ, ナオヤス 加治屋, 豪 14206 カジヤ, タケシ Yuge, Toshio 5744 Ookawa, Naoyasu 14210 Kajiya, Takeshi 14211 Small wind turbine, Efficiency of wind turbine, Electric power generation, Nozzle, Diffuser Abstract Thought a radiator-fan of cars had not been designed as a wind turbine, the fan is used as a small wind turbine with the 30cm diameter. Two ways of mounting of the wind turbine impeller are regular-pitch and reverse-pitch types. The characteristics of the wind turbine in a uniform flow are measured. The efficiency of the wind turbine at the regular pitch type is about 12% under the wind velocity 15m/s. In order to improve the efficiency of the wind turbine, nozzles and diffusers are set in the upstream of the small wind turbine. Effects of these nozzles and diffuses on the wind turbine performance are investigated experimentally. Nozzles do not make the wind velocity increase at downstream of the nozzles. As diffusers make the wind velocity increase only near the axis of the diffuser, the efficiency of the wind turbine is not improved with the diffusers. departmental bulletin paper 宮崎大学工学部 Faculty of Engineering, University of Miyazaki 2003-07 VoR application/pdf 宮崎大学工学部紀要 32 253 259 Memoirs of Faculty of Engineering, University of Miyazaki AA00732558 05404924 https://miyazaki-u.repo.nii.ac.jp/record/2718/files/KJ00002426406.pdf http://hdl.handle.net/10458/274 https://miyazaki-u.repo.nii.ac.jp/records/2718 jpn