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Experimental Investigation of Flow-Induced Motion and Energy Conversion of a T-Section Prism

Author

Listed:
  • Nan Shao

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Jijian Lian

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Guobin Xu

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Fang Liu

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Heng Deng

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Quanchao Ren

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

  • Xiang Yan

    (State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, No. 92, Wei Jin Road, Nan Kai District, Tianjin 300072, China)

Abstract

Flow-induced motion (FIM) performs well in energy conversion but has been barely investigated, particularly for prisms with sharp sections. Previous studies have proven that T-section prisms that undergo galloping branches with high amplitude are beneficial to energy conversions. The FIM experimental setup designed by Tianjin University (TJU) was improved to conduct a series of FIM responses and energy conversion tests on a T-section prism. Experimental results are presented and discussed, to reveal the complete FIM responses and power generation characteristics of the T-section prism under different load resistances and section aspect ratios. The main findings are summarized as follows. (1) Hard galloping (HG), soft galloping (SG), and critical galloping (CG) can be observed by varying load resistances. When the load resistances are low, HG occurs; otherwise, SG occurs. (2) In the galloping branch, the highest amplitude and the most stable oscillation cause high-quality electrical energy production by the generator. Therefore, the galloping branch is the best branch for harvesting energy. (3) In the galloping branch, as the load resistances decrease, the active power continually increases until the prism is suppressed from galloping to a vortex-induced vibration (VIV) lower branch with a maximum active power P harn of 21.23 W and a maximum η out of 20.2%. (4) Different section aspect ratios ( α ) can significantly influence the FIM responses and energy conversions of the T-section prism. For small aspect ratios, galloping is hardly observed in the complete responses, but the power generation efficiency ( η out ,0.8 = 27.44%) becomes larger in the galloping branch.

Suggested Citation

  • Nan Shao & Jijian Lian & Guobin Xu & Fang Liu & Heng Deng & Quanchao Ren & Xiang Yan, 2018. "Experimental Investigation of Flow-Induced Motion and Energy Conversion of a T-Section Prism," Energies, MDPI, vol. 11(8), pages 1-23, August.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2035-:d:162142
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    References listed on IDEAS

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    1. Sun, Hai & Kim, Eun Soo & Nowakowski, Gary & Mauer, Erik & Bernitsas, Michael M., 2016. "Effect of mass-ratio, damping, and stiffness on optimal hydrokinetic energy conversion of a single, rough cylinder in flow induced motions," Renewable Energy, Elsevier, vol. 99(C), pages 936-959.
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    Cited by:

    1. Jijian Lian & Zhichuan Wu & Shuai Yao & Xiang Yan & Xiaoqun Wang & Zhaolin Jia & Yan Long & Nan Shao & Defeng Yang & Xinyi Li, 2022. "Experimental Investigation of Flow-Induced Motion and Energy Conversion for Two Rigidly Coupled Triangular Prisms Arranged in Tandem," Energies, MDPI, vol. 15(21), pages 1-20, November.
    2. Lian, Jijian & Ran, Danjie & Yan, Xiang & Liu, Fang & Shao, Nan & Wang, Xiaoqun & Yang, Xu, 2023. "Hydrokinetic energy harvesting from flow-induced motion of oscillators with different combined sections," Energy, Elsevier, vol. 269(C).
    3. Shao, Nan & Lian, Jijian & Liu, Fang & Yan, Xiang & Li, Peiyao, 2020. "Experimental investigation of flow induced motion and energy conversion for triangular prism," Energy, Elsevier, vol. 194(C).
    4. Shao, Nan & Lian, JiJian & Yan, Xiang & Liu, Fang & Wang, Xiaoqun, 2022. "Experimental study on energy conversion of flow induced motion for two triangular prisms in staggered arrangement," Energy, Elsevier, vol. 249(C).
    5. Artur J. Jaworski, 2019. "Special Issue “Fluid Flow and Heat Transfer”," Energies, MDPI, vol. 12(16), pages 1-4, August.

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