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Influence of stall fences on the performance of Wells turbine

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  • Das, Tapas K.
  • Samad, Abdus

Abstract

The Wells turbine is one of the candidates for use in Oscillating Water Column (OWC) type wave energy conversion devices. The narrow operating range of a Wells turbine limits its application to a small range of ocean environments. At a high angle of attack, the turbine performance drops suddenly due to a phenomenon known as stall. The present study introduces stall fences in the Wells turbine blade to postpone stall and widen the operating range. The stall fences are defined by the length, height, and thickness in percentage of blade chord length. For the present study, dimensions of the stall fences are determined by using a surrogate-based optimization technique. The modified and reference turbine are numerically studied by solving the Reynolds-Averaged-Navier-Stokes equations in the commercial CFD software ANSYS CFX 16.1. The comparison of fenced turbine with reference turbine shows 16.6% improvement in operating range at the cost of peak torque developed by the turbine. The peak-to-average power ratio in the stall-free range is reduced by 16.7% when stall fences are used. The change in internal flow due to the presence of stall fences is analyzed in detail in the present work.

Suggested Citation

  • Das, Tapas K. & Samad, Abdus, 2020. "Influence of stall fences on the performance of Wells turbine," Energy, Elsevier, vol. 194(C).
    • Handle: RePEc:eee:energy:v:194:y:2020:i:c:s0360544219325599
    DOI: 10.1016/j.energy.2019.116864
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    References listed on IDEAS

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    Cited by:

    1. Mohammad Nasim Uddin & Michael Atkinson & Frimpong Opoku, 2023. "CFD Investigation of a Hybrid Wells Turbine with Passive Flow Control," Energies, MDPI, vol. 16(9), pages 1-28, April.
    2. Valizadeh, Reza & Abbaspour, Madjid & Rahni, Mohammad Taeibi, 2020. "A low cost Hydrokinetic Wells turbine system for oceanic surface waves energy harvesting," Renewable Energy, Elsevier, vol. 156(C), pages 610-623.
    3. 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).
    4. Liu, Zhen & Xu, Chuanli & Zhang, Xiaoxia & Ning, Dezhi, 2023. "Experimental study on an isolated oscillating water column wave energy converting device in oblique waves," Renewable and Sustainable Energy Reviews, Elsevier, vol. 184(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. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Li, Ming, 2022. "Experimental study on the overall performance of a model OWC system under the free-spinning mode in irregular waves," Energy, Elsevier, vol. 250(C).
    7. Mustafa Özden & Mustafa Serdar Genç & Kemal Koca, 2023. "Passive Flow Control Application Using Single and Double Vortex Generator on S809 Wind Turbine Airfoil," Energies, MDPI, vol. 16(14), pages 1-17, July.
    8. Licheri, Fabio & Ghisu, Tiziano & Cambuli, Francesco & Puddu, Pierpaolo, 2024. "Experimental reconstruction of the local flow field in a Wells turbine using a three-dimensional pressure probe," Energy, Elsevier, vol. 296(C).
    9. Liu, Zhen & Xu, Chuanli & Kim, Kilwon & Choi, Jongsu & Hyun, Beom-soo, 2021. "An integrated numerical model for the chamber-turbine system of an oscillating water column wave energy converter," Renewable and Sustainable Energy Reviews, Elsevier, vol. 149(C).
    10. 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.
    11. Morais, F.J.F. & Carrelhas, A.A.D. & Gato, L.M.C., 2023. "Biplane-rotor Wells turbine: The influence of solidity, presence of guide vanes and comparison with other configurations," Energy, Elsevier, vol. 276(C).
    12. Ardaneh, Fatemeh & Abdolahifar, Abolfazl & Karimian, S.M.H., 2022. "Numerical analysis of the pitch angle effect on the performance improvement and flow characteristics of the 3-PB Darrieus vertical axis wind turbine," Energy, Elsevier, vol. 239(PD).
    13. 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).

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