TY - JOUR
T1 - Experimental and numerical investigations of flow fields behind a small wind turbine with a flanged diffuser
AU - Abe, K.
AU - Nishida, M.
AU - Sakurai, A.
AU - Ohya, Y.
AU - Kihara, H.
AU - Wada, E.
AU - Sato, K.
N1 - Funding Information:
This research was partially supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan (Grant-in-Aids for Scientific Research, No. 14205139, No. 15360450), the Ministry of Economy, Trade and Industry (Matching Fund), Sumitomo Fund (Environment Protection Research), Harada Memorial Fund (Fluid Machinery Research) and Kyushu University (Program and Project for Education and Research). The authors wish to express their appreciation to Mr. M. Matsubara of Kyushu University, Fukuoka, Japan for his technical help in the experiments. KA also wishes to express his appreciation to Professor M.A. Leschziner of Imperial College of Science, Technology and Medicine, London, UK for the support in using the STREAM code.
PY - 2005/12
Y1 - 2005/12
N2 - Experimental and numerical investigations were carried out for flow fields of a small wind turbine with a flanged diffuser. The present wind-turbine system gave a power coefficient higher than the Betz limit (= 16/27) owing to the effect of the flanged diffuser. To elucidate the flow mechanism, mean velocity profiles behind a wind turbine were measured using a hot-wire technique. By processing the obtained data, characteristic values of the flow fields were estimated and compared with those for a bare wind turbine. In addition, computations corresponding to the experimental conditions were made to assess the predictive performance of the simulation model presently used and also to investigate the flow field in more detail. The present experimental and numerical results gave useful information about the flow mechanism behind a wind turbine with a flanged diffuser. In particular, a considerable difference was seen in the destruction process of the tip vortex between the bare wind turbine and the wind turbine with a flanged diffuser.
AB - Experimental and numerical investigations were carried out for flow fields of a small wind turbine with a flanged diffuser. The present wind-turbine system gave a power coefficient higher than the Betz limit (= 16/27) owing to the effect of the flanged diffuser. To elucidate the flow mechanism, mean velocity profiles behind a wind turbine were measured using a hot-wire technique. By processing the obtained data, characteristic values of the flow fields were estimated and compared with those for a bare wind turbine. In addition, computations corresponding to the experimental conditions were made to assess the predictive performance of the simulation model presently used and also to investigate the flow field in more detail. The present experimental and numerical results gave useful information about the flow mechanism behind a wind turbine with a flanged diffuser. In particular, a considerable difference was seen in the destruction process of the tip vortex between the bare wind turbine and the wind turbine with a flanged diffuser.
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U2 - 10.1016/j.jweia.2005.09.003
DO - 10.1016/j.jweia.2005.09.003
M3 - Article
AN - SCOPUS:29444454923
SN - 0167-6105
VL - 93
SP - 951
EP - 970
JO - Journal of Industrial Aerodynamics
JF - Journal of Industrial Aerodynamics
IS - 12
ER -
