TY - JOUR
T1 - Development of a shrouded wind turbine with a flanged diffuser
AU - Ohya, Yuji
AU - Karasudani, Takashi
AU - Sakurai, Akira
AU - Abe, Ken ichi
AU - Inoue, Masahiro
N1 - Funding Information:
This work was supported by four organizations including a Grant-in-Aids for Scientific Research, no. 14205139, sponsored by the Ministry of Education, Culture, Sports, Science and Technology, Japan, Environment Protection Research sponsored by the Sumitomo Fund, Fluid Machinery Research sponsored by the Harada Memorial Fund, and the Program and Project for Education and Research of Kyushu University. It was also supported by a matching fund from the Ministry of Economy, Trade and Industry. We gratefully acknowledge our laboratory staff, Messrs. N. Fukamachi and K. Watanabe, Research Institute for Applied Mechanics, Kyushu University, for their great cooperation in the experiments and data analysis.
PY - 2008/5
Y1 - 2008/5
N2 - We have developed a wind turbine system that consists of a diffuser shroud with a broad-ring flange at the exit periphery and a wind turbine inside it. The flanged-diffuser shroud plays a role of a device for collecting and accelerating the approaching wind. Emphasis is placed on positioning the flange at the exit of a diffuser shroud. Namely, the flange generates a low-pressure region in the exit neighborhood of the diffuser by vortex formation and draws more mass flow to the wind turbine inside the diffuser shroud. To obtain a higher power output of the shrouded wind turbine, we have examined the optimal form of the flanged diffuser, such as the diffuser open angle, flange height, hub ratio, centerbody length, inlet shroud shape and so on. As a result, a shrouded wind turbine equipped with a flanged diffuser has been developed, and demonstrated power augmentation for a given turbine diameter and wind speed by a factor of about 4-5 compared to a standard (bare) wind turbine. In a field experiment using a prototype wind turbine with a flanged diffuser shroud, the output performance was as expected and equalled that of the wind tunnel experiment.
AB - We have developed a wind turbine system that consists of a diffuser shroud with a broad-ring flange at the exit periphery and a wind turbine inside it. The flanged-diffuser shroud plays a role of a device for collecting and accelerating the approaching wind. Emphasis is placed on positioning the flange at the exit of a diffuser shroud. Namely, the flange generates a low-pressure region in the exit neighborhood of the diffuser by vortex formation and draws more mass flow to the wind turbine inside the diffuser shroud. To obtain a higher power output of the shrouded wind turbine, we have examined the optimal form of the flanged diffuser, such as the diffuser open angle, flange height, hub ratio, centerbody length, inlet shroud shape and so on. As a result, a shrouded wind turbine equipped with a flanged diffuser has been developed, and demonstrated power augmentation for a given turbine diameter and wind speed by a factor of about 4-5 compared to a standard (bare) wind turbine. In a field experiment using a prototype wind turbine with a flanged diffuser shroud, the output performance was as expected and equalled that of the wind tunnel experiment.
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U2 - 10.1016/j.jweia.2008.01.006
DO - 10.1016/j.jweia.2008.01.006
M3 - Article
AN - SCOPUS:43749111188
SN - 0167-6105
VL - 96
SP - 524
EP - 539
JO - Journal of Wind Engineering and Industrial Aerodynamics
JF - Journal of Wind Engineering and Industrial Aerodynamics
IS - 5
ER -
