S0503-2-4 鍔つきディフューザ風車まわりの流れ場の渦構造に関する数値的研究([S0503-2]自然の流体エネルギー利用技術(2))

Translated title of the contribution: S0503-2-4 Numerical investigation of the eddy structure around a wind turbine with a flanged diffuser

上野 祥彦, 秦 裕也, 大屋 裕二, 内田 孝紀

Research output: Contribution to journalArticle

Abstract

We have developed a new wind turbine system (WLT, WindLens Turbine) that consists of a difluser shroud with a brim at the exit periphery and a wind turbine inside it. WLT has a bigger power output compared with a general same size wind turbine. This is because a low-pressure region due to a strong vortex formation draws more mass flow to the wind turbine inside the difluser shroud. To investigate the three dimensional flow pattern around the WLT, numerical simulations are conducted with STAR-CCM+ using the LES for turbulent modeling and the moving boundary technique for rotating blades. In the simulation, it is confirmed that vortex rings are shed behind the brim alternately. However, we found an interaction with counter vortices formed between the tip vortex and the inside of the WindLens. In this report, behaviors of these vortices are investigated in more detail.
Translated title of the contributionS0503-2-4 Numerical investigation of the eddy structure around a wind turbine with a flanged diffuser
Original languageJapanese
Pages (from-to)107-108
Number of pages2
Journal年次大会講演論文集
Volume2010
Issue number0
DOIs
Publication statusPublished - 2010

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