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Fluctuation of a bending moment acting on the rotating blade of a horizontal axis wind turbine : comparison of experimental results and annular momentum theory Shimizu, Yukimaru Nakamura, Shunsuke Takahashi, Masato Azuma, Akira 社団法人日本機械学会 本文データは学協会の許諾に基づきCiNiiから複製したものである 530 Horizontal Axis Wind Turbine Bending Moment of Root of Rotating Blade Field Test Fluctuation of Bendng Moment Annular Momentum Theory application/pdf In this report, the bending moment in the root of a rotating blade was directly measured by strain gauges, and these experimental values were compared with the theoretical values estimated by annular momentum theory. In the experiment, a middle scale horizontal axis wind turbine having a diameter of φ6m was used. The maximum power of the turbine was 10 kVA. The number of blades was two. As a result, the following was found; (1) Both values (theoretical and experimental) agree well. (2) The mean values of flapwise moment in the blade root were about three times larger than those of chordwise moment. (3) The chordwise moment caused by the dead weight of the blade was very large compared with the chordwise moment caused by the fluid force. (4) The instantaneous moments in the blade root were about two times larger than those of the mean values per 1 minute. Japan Society of Mechanical Engineers 1987-02-01 eng journal article VoR http://hdl.handle.net/10076/10486 https://mie-u.repo.nii.ac.jp/records/8307 http://ci.nii.ac.jp/naid/110002346005 AA10701641 0913-185X JSME international journal : bulletin of the JSME 30 260 288 295 https://mie-u.repo.nii.ac.jp/record/8307/files/40A7067.pdf application/pdf 815.5 kB 2017-02-18