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Study on the Wake Characterization of a Horizontal-Axis Tidal Stream Turbine Utilizing a PIV System in a Large Circulating Water Tunnel

Author

Listed:
  • Sejin Jung

    (Korea Institute of Ocean Science and Technology, Busan Metropolitan City 49111, Republic of Korea
    These authors contributed equally to this work.)

  • Heebum Lee

    (Renewable Energy Engineering Section, Korea Hydro & Nuclear Power Co., Ltd., Daejeon 34101, Republic of Korea
    These authors contributed equally to this work.)

  • Dasom Jeong

    (Department of Mechanical System Engineering, Jeju National University, Jeju 63243, Republic of Korea)

  • Jihoon Kim

    (Korea Institute of Ocean Science and Technology, Busan Metropolitan City 49111, Republic of Korea)

  • Jin Hwan Ko

    (Department of Mechanical System Engineering, Jeju National University, Jeju 63243, Republic of Korea)

Abstract

In this study, a particle image velocimetry (PIV) system was used in a large circulating water tank to investigate the wake of a horizontal-axis tidal turbine model, focusing on minor blockage effects and scale influence. A wake map of the turbine was constructed based on PIV measurements, using velocity deficit, turbulence intensity (TI), and turbulence kinetic energy (TKE) as key indicators. The results showed that TKE developed later than TI, forming a plateau-like shape. This plateau was considered the decay region, with the transition and far-wake regions located before and after it, respectively. Additionally, the power law exponent of TI decreased from −0.731 in the decay region to −0.765 in the far wake, indicating a steeper decay further downstream. Overall, the wake map of the tidal stream turbine model exhibited similarities to that of a previously reported wind turbine model.

Suggested Citation

  • Sejin Jung & Heebum Lee & Dasom Jeong & Jihoon Kim & Jin Hwan Ko, 2025. "Study on the Wake Characterization of a Horizontal-Axis Tidal Stream Turbine Utilizing a PIV System in a Large Circulating Water Tunnel," Energies, MDPI, vol. 18(7), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:7:p:1870-:d:1629743
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    References listed on IDEAS

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