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

Title & Authors
Flow-Turbine Interaction CFD Analysis for Performance Evaluation of Vertical Axis Tidal Current Turbines (II)
Yi, Jin-Hak; Oh, Sang-Ho; Park, Jin-Soon; Lee, Kwang-Soo; Lee, Sang-Yeol;

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 $\small{10^5}$. 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 $\small{0^{\circ}}$, and the torque pulsation ratio was minimized when the blade covered $\small{360^{\circ}}$ for the case of a turbine with a twisting angle of $\small{120^{\circ}}$.
Keywords
Flow-turbine interaction analysis;Computational fluid dynamics;Vertical axis tidal current turbine;H-type darrieus turbine;Gorlov helical turbine;
Language
Korean
Cited by
1.
수직축 조류 터빈 발전효율 평가를 위한 유동-터빈 연동 CFD 해석 (I),이진학;오상호;박진순;이광수;이상열;

한국해양공학회지, 2013. vol.27. 3, pp.67-72
1.
Flow-Turbine Interaction CFD Analysis for Performance Evaluation of Vertical Axis Tidal Current Turbines (I), Journal of Ocean Engineering and Technology, 2013, 27, 3, 67
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Yi, J.-H., Oh, S.-H., Park, J.-S., Lee, K.-S., Lee, S.-Y., 2013. Flow- Turbine Interaction CFD Analysis for Performance Evaluation of Vertical Axis Tidal Current Turbines (I). Journal of Ocean Engineering and Technology, 27(3), 67-72.