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http://dx.doi.org/10.5574/KSOE.2013.27.3.073

Flow-Turbine Interaction CFD Analysis for Performance Evaluation of Vertical Axis Tidal Current Turbines (II)  

Yi, Jin-Hak (Coastal Development and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Oh, Sang-Ho (Coastal Development and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Park, Jin-Soon (Coastal Development and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Lee, Kwang-Soo (Coastal Development and Ocean Energy Research Division, Korea Institute of Ocean Science and Technology)
Lee, Sang-Yeol (LeeWoos Co. Ltd.)
Publication Information
Journal of Ocean Engineering and Technology / v.27, no.3, 2013 , pp. 73-78 More about this Journal
Abstract
CFD (computational fluid dynamics) analyses that considered the dynamic interaction effects between the flow and a turbine were performed to evaluate the power output characteristics of two representative vertical-axis tidal-current turbines: an H-type Darrieus turbine and Gorlov helical turbine (GHT). For this purpose, a commercial CFD code, Star-CCM+, was utilized, and the power output characteristic were investigated in relation to the scale ratio using the relation between the Reynolds number and the lift-to-drag ratio. It was found that the power coefficients were significantly reduced when the scaled model turbine was used, especially when the Reynolds number was lower than $10^5$. The power output characteristics of GHT in relation to the twisting angle were also investigated using a three-dimensional CFD analysis, and it was found that the power coefficient was maximized for the case of a Darrieus turbine, i.e., a twisting angle of $0^{\circ}$, and the torque pulsation ratio was minimized when the blade covered $360^{\circ}$ for the case of a turbine with a twisting angle of $120^{\circ}$.
Keywords
Flow-turbine interaction analysis; Computational fluid dynamics; Vertical axis tidal current turbine; H-type darrieus turbine; Gorlov helical turbine;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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