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

Journal Article

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

Author:

Jung, S.; Lee, H.; Jeong, D.; Kim, J.; Ko, J.

Publication Date:

April 7, 2025

Journal:

Energies

Volume:

Issue:

Pages:

Publisher:

MDPI

Affiliation:

Korea Institute of Ocean Science and Technology (KIOST), Korea Hydro & Nuclear Power Co., Jeju National University

Technology:

Current, Axial Flow Turbine

Collection Method:

Lab Data

Engineering:

Hydrodynamics

Language:

English

Document Access

Website:

External Link

Attachment:

Access File

Notice: This material may be protected by Copyright Law.

Citation

Jung, S.; Lee, H.; Jeong, D.; Kim, J.; Ko, J. (2025). Study on the Wake Characterization of a Horizontal-Axis Tidal Stream Turbine Utilizing a PIV System in a Large Circulating Water Tunnel. Energies, 18(7), 15. https://doi.org/10.3390/en18071870

@article{Jung-2025-,
author = {Jung, S and Lee, H and Jeong, D and Kim, J and Ko, J},
title = {Study on the Wake Characterization of a Horizontal-Axis Tidal Stream Turbine Utilizing a PIV System in a Large Circulating Water Tunnel},
journal = {Energies},
year = {2025},
month = {apr},
publisher = {MDPI},
volume = {18},
number = {7},
pages = {15},
doi = {10.3390/en18071870},
url = {https://www.mdpi.com/1996-1073/18/7/1870},
keywords = {Current, Axial Flow Turbine, Lab Data, Hydrodynamics},
}

Export Citation to BibTex

TY - JOUR
TI - Study on the Wake Characterization of a Horizontal-Axis Tidal Stream Turbine Utilizing a PIV System in a Large Circulating Water Tunnel
AU - Jung, S
AU - Lee, H
AU - Jeong, D
AU - Kim, J
AU - Ko, J
T2 - Energies
AB - 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.
DA - 2025/04//
PY - 2025
PB - MDPI
VL - 18
IS - 7
SP - 15
UR - https://www.mdpi.com/1996-1073/18/7/1870
DO - 10.3390/en18071870
LA - English
KW - Current
KW - Axial Flow Turbine
KW - Lab Data
KW - Hydrodynamics
ER -

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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.