Development of a high-performance wind turbine equipped with a brimmed diffuser shroud

Yuji Ohya, Takashi Karasudani, Akira Sakurai, Masahiro Inoue

研究成果: ジャーナルへの寄稿学術誌査読

25 被引用数 (Scopus)


We have developed a new wind turbine system that consists of a diffuser shroud with a broad-ring brim at the exit periphery and a wind turbine inside it. The brimmed-diffuser shroud plays the role of a device for collecting and accelerating the approaching wind. Emphasis is placed on positioning the brim at the exit of the diffuser shroud. Namely, the brim generates a very low-pressure region in the exit neighborhood of the diffuser by strong 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 for the brimmed diffuser, such as the diffuser open angle, brim height, hub ratio, centerbody length, inlet shroud shape and so on. As a result, a shrouded wind turbine equipped with a brimmed diffuser has been developed, and demonstrated power augmentation for a given turbine diameter and wind speed by a factor of about five compared to a standard (bare) wind turbine.

ジャーナルTransactions of the Japan Society for Aeronautical and Space Sciences
出版ステータス出版済み - 12月 28 2006

!!!All Science Journal Classification (ASJC) codes

  • 航空宇宙工学
  • 宇宙惑星科学


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