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Co-simulations of a semi-passive oscillating foil turbine using a hydraulic system

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  • Ma, Penglei
  • Liu, Guijie
  • Wang, Honghui
  • Wang, Yong
  • Xie, Yudong

Abstract

Turbines based on oscillating foils possess obvious advantages in shallow waters. In this study, a hydraulic system was designed for the semi-passive oscillating foil, which is more suitable for practical applications than the traditional spring-damper system. Co-simulations using software Fluent® and AMESim™ were carried out to examine the performance of the hydraulic system. Based on the results of the spring-damper system, three typical cases were analyzed for each variable to study the effects of kinematic and mechanical parameters. The results demonstrated that the oscillating foil based on the hydraulic system could achieve a regular heaving response. However, a significant feature of the developed system is that the foil stops briefly at the endpoint of the heaving motion. The kinematic parameter had a significant effect on both the hydrodynamic characteristics and the heaving response. Maximum energy is harvested at reduced frequency f ∗ = 0.10, while the maximum efficiency occurred at f ∗ = 0.125. The mechanical parameters, including the spring, cylinder radius, and rotary load, affected the hydrodynamic characteristics slightly. However, the parameters of the cylinder and the rotary load had a significant impact on the heaving response and the power output performance. The results also indicated that the unstable heaving response should be avoided, as it would decrease the energy harvesting efficiency.

Suggested Citation

  • Ma, Penglei & Liu, Guijie & Wang, Honghui & Wang, Yong & Xie, Yudong, 2021. "Co-simulations of a semi-passive oscillating foil turbine using a hydraulic system," Energy, Elsevier, vol. 217(C).
    • Handle: RePEc:eee:energy:v:217:y:2021:i:c:s0360544220324300
    DOI: 10.1016/j.energy.2020.119323
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    References listed on IDEAS

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    1. Liu, Zhen & Qu, Hengliang & Zhang, Guoliang, 2020. "Experimental and numerical investigations of a coupled-pitching hydrofoil under the fully-activated mode," Renewable Energy, Elsevier, vol. 155(C), pages 432-446.
    2. Liu, Zhen & Qu, Hengliang & Shi, Hongda, 2019. "Performance evaluation and enhancement of a semi-activated flapping hydrofoil in shear flows," Energy, Elsevier, vol. 189(C).
    3. Ma, Penglei & Wang, Yong & Xie, Yudong & Huo, Zhipu, 2018. "Numerical analysis of a tidal current generator with dual flapping wings," Energy, Elsevier, vol. 155(C), pages 1077-1089.
    4. Ma, Penglei & Wang, Yong & Xie, Yudong & Zhang, Jianhua, 2018. "Analysis of a hydraulic coupling system for dual oscillating foils with a parallel configuration," Energy, Elsevier, vol. 143(C), pages 273-283.
    5. Teng, Lubao & Deng, Jian & Pan, Dingyi & Shao, Xueming, 2016. "Effects of non-sinusoidal pitching motion on energy extraction performance of a semi-active flapping foil," Renewable Energy, Elsevier, vol. 85(C), pages 810-818.
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    Cited by:

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    3. Zhang, Yubing & Wang, Qixian & Han, Jiazhen & Xie, Yudong, 2023. "Effects of unsteady stream on hydrodynamic behavior of flexible hydrofoil in semi-passive mode," Renewable Energy, Elsevier, vol. 206(C), pages 451-465.

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