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

수직축 조류 터빈 발전효율 평가를 위한 유동-터빈 연동 CFD 해석 (II)

Yi, Jin-Hak;Oh, Sang-Ho;Park, Jin-Soon;Lee, Kwang-Soo;Lee, Sang-Yeol
이진학;오상호;박진순;이광수;이상열

  • Received : 2013.03.19
  • Accepted : 2013.06.10
  • Published : 2013.06.30

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

References

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Cited by

  1. Flow-Turbine Interaction CFD Analysis for Performance Evaluation of Vertical Axis Tidal Current Turbines (I) vol.27, pp.3, 2013, https://doi.org/10.5574/KSOE.2013.27.3.067