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High performance ocean energy harvesting turbine design–A new casing treatment scheme

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  • Halder, Paresh
  • Samad, Abdus
  • Kim, Jin-Hyuk
  • Choi, Young-Seok

Abstract

Delaying a stall improves the performance of any turbomachinery system. TC (tip clearance), which is used in a bi-directional flow Wells turbine of an ocean wave energy device, changes the flow pattern on the turbine blade suction surface, while changing or modifying the TC zone can help obtaining a delayed stall. In the present work, a new tip grooving scheme is introduced and the performance is compared for different tip groove depths and TCs of a Wells turbine. The performance is defined in terms of wider operating range or stall delay, power production and efficiency. The problem was solved by a numerical analysis technique. A multi-block meshing scheme was employed to generate structured and hexahedral elements in the computational domain and the flow was solved in ANSYS CFX® v14.5 by solving Reynolds-averaged Navier Stokes equations. It was found that the grooves improve the turbine operating range and power production as compared to those of the turbine without a groove. The groove depth of 3% of the chord length produced highest power and widest operating range. Using the circumferential groove, 26% increase in turbine power output for a particular operating point is achieved.

Suggested Citation

  • Halder, Paresh & Samad, Abdus & Kim, Jin-Hyuk & Choi, Young-Seok, 2015. "High performance ocean energy harvesting turbine design–A new casing treatment scheme," Energy, Elsevier, vol. 86(C), pages 219-231.
    • Handle: RePEc:eee:energy:v:86:y:2015:i:c:p:219-231
    DOI: 10.1016/j.energy.2015.03.131
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    References listed on IDEAS

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    1. Torresi, M. & Camporeale, S.M. & Strippoli, P.D. & Pascazio, G., 2008. "Accurate numerical simulation of a high solidity Wells turbine," Renewable Energy, Elsevier, vol. 33(4), pages 735-747.
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    6. Mohamed, M.H. & Shaaban, S., 2013. "Optimization of blade pitch angle of an axial turbine used for wave energy conversion," Energy, Elsevier, vol. 56(C), pages 229-239.
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    Cited by:

    1. Nazeryan, Mohammad & Lakzian, Esmail, 2018. "Detailed entropy generation analysis of a Wells turbine using the variation of the blade thickness," Energy, Elsevier, vol. 143(C), pages 385-405.
    2. Halder, Paresh & Samad, Abdus & Thévenin, Dominique, 2017. "Improved design of a Wells turbine for higher operating range," Renewable Energy, Elsevier, vol. 106(C), pages 122-134.
    3. Guo, Peng & Zhang, Yongliang & Chen, Wenchuang, 2023. "Numerical analysis on a self-rectifying impulse turbine with U-shaped duct for oscillating water column wave energy conversion," Energy, Elsevier, vol. 274(C).
    4. Geng, Kaihe & Yang, Ce & Zhao, Ben & Zhao, Wei & Gao, Jianbing & Hu, Chenxing & Zhang, Hanzhi & Wu, Wangxia, 2023. "Residual circulation budget analysis in a Wells turbine with leading-edge micro-cylinders," Renewable Energy, Elsevier, vol. 216(C).
    5. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2023. "Performance enhancement of a Wells turbine using CFD-optimization algorithms coupling," Energy, Elsevier, vol. 282(C).
    6. Qi, Lingfei & Li, Hai & Wu, Xiaoping & Zhang, Zutao & Duan, Wenjun & Yi, Minyi, 2021. "A hybrid piezoelectric-electromagnetic wave energy harvester based on capsule structure for self-powered applications in sea-crossing bridges," Renewable Energy, Elsevier, vol. 178(C), pages 1223-1235.
    7. Yin, Xiuxing & Zhao, Xiaowei & Zhang, Wencan, 2018. "A novel hydro-kite like energy converter for harnessing both ocean wave and current energy," Energy, Elsevier, vol. 158(C), pages 1204-1212.
    8. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2022. "Performance assessment of a modified wells turbine using an integrated casing groove and Gurney flap design for wave energy conversion," Renewable Energy, Elsevier, vol. 197(C), pages 627-642.
    9. Geng, Kaihe & Yang, Ce & Hu, Chenxing & Li, Yanzhao & Yang, Changmao, 2022. "Numerical investigation on the loss audit of Wells turbine with exergy analysis," Renewable Energy, Elsevier, vol. 189(C), pages 273-287.
    10. Paresh Halder & Hideki Takebe & Krisna Pawitan & Jun Fujita & Shuji Misumi & Tsumoru Shintake, 2020. "Turbine Characteristics of Wave Energy Conversion Device for Extraction Power Using Breaking Waves," Energies, MDPI, vol. 13(4), pages 1-17, February.
    11. Kotb, Ahmed T.M. & Nawar, Mohamed A.A. & Attai, Youssef A. & Mohamed, Mohamed H., 2024. "Impact of tapered leading-edge micro-cylinder on the performance of wells turbine for wave energy conversion: CFD-optimization algorithms coupling study," Energy, Elsevier, vol. 293(C).
    12. Das, Tapas K. & Samad, Abdus, 2020. "Influence of stall fences on the performance of Wells turbine," Energy, Elsevier, vol. 194(C).

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