| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
This study investigated the influence of a wind turbine tower on wind velocity distribution in the wake of a wind turbine. Large-eddy simulations of the wind flow around the wind turbine were performed for cases in which a wind turbine tower was explicitly resolved and cases in which the tower was neglected. In addition, the aerodynamic force on the tower was analyzed. Moreover, the tower was modelled by adding sink terms that include the aerodynamic force coefficients to the Navier-Stokes equations.
Results confirmed that the effects of the tower on the wind velocity distribution were significant and changed with tip-speed ratio. It was also confirmed that the local drag and lift coefficients of the tower changed drastically in the vertical direction. Regarding the simulation using the tower model, the asymmetric distribution of the wind velocity at the height of the hub height was not regenerated.
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