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The performance and hydrodynamics in unsteady flow of a horizontal axis tidal turbine

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  • Abuan, Binoe E.
  • Howell, Robert J.

Abstract

This paper presents the effect of idealised unsteady tidal velocities on the performance of a newly-designed Horizontal-Axis Tidal Turbine (HATT) through the use of numerical simulations using Computational Fluid Dynamics (CFD). Simulations are conducted using ANSYS FLUENT implementing the Reynolds-Averaged Navier Stokes (RANS) equations to model the fluid flow problem. A steady flow case is modelling in a 2 m/s stream flow and the resulting performance curve was used as the basis of comparison for the unsteady flow simulations. A decrease in performance was seen for the unsteady flow simulation around peak TSR (TSR = 6) which has a cyclic-averaged coefficient of performance (CP) of 37.50% compared to the steady CP of 39.46%. Similar decreases in performance with unsteady flow was observed away from the peak performance TSR at TSR = 4 and TSR = 8. Furthermore, with unsteady flow that it was found that as the TSR increases, the difference between the cyclic-averaged CP and the steady flow CP drops. The effect of variations in the frequency and amplitude of the unsteady flow showed that a decrease in the cyclic-averaged CP was observed and this performance reduced with increasing frequency and increasing amplitude of unsteady incoming flows. For the cases studied here, unsteady flows are detrimental to the performance of the tidal turbine.

Suggested Citation

  • Abuan, Binoe E. & Howell, Robert J., 2019. "The performance and hydrodynamics in unsteady flow of a horizontal axis tidal turbine," Renewable Energy, Elsevier, vol. 133(C), pages 1338-1351.
    • Handle: RePEc:eee:renene:v:133:y:2019:i:c:p:1338-1351
    DOI: 10.1016/j.renene.2018.09.045
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    References listed on IDEAS

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    1. de Jesus Henriques, Tiago A. & Hedges, Terry S. & Owen, Ieuan & Poole, Robert J., 2016. "The influence of blade pitch angle on the performance of a model horizontal axis tidal stream turbine operating under wave–current interaction," Energy, Elsevier, vol. 102(C), pages 166-175.
    2. Mason-Jones, A. & O'Doherty, D.M. & Morris, C.E. & O'Doherty, T., 2013. "Influence of a velocity profile & support structure on tidal stream turbine performance," Renewable Energy, Elsevier, vol. 52(C), pages 23-30.
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    5. Luznik, Luksa & Flack, Karen A. & Lust, Ethan E. & Taylor, Katharin, 2013. "The effect of surface waves on the performance characteristics of a model tidal turbine," Renewable Energy, Elsevier, vol. 58(C), pages 108-114.
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    1. Wang, Shu-qi & Li, Chen-yin & Zhang, Ying & Jing, Feng-mei & Chen, Lin-feng, 2022. "Influence of pitching motion on the hydrodynamic performance of a horizontal axis tidal turbine considering the surface wave," Renewable Energy, Elsevier, vol. 189(C), pages 1020-1032.
    2. Faizan, Muhammad & Badshah, Saeed & Badshah, Mujahid & Haider, Basharat Ali, 2022. "Performance and wake analysis of horizontal axis tidal current turbine using Improved Delayed Detached Eddy Simulation," Renewable Energy, Elsevier, vol. 184(C), pages 740-752.
    3. Zia Ur Rehman & Saeed Badshah & Amer Farhan Rafique & Mujahid Badshah & Sakhi Jan & Muhammad Amjad, 2021. "Effect of a Support Tower on the Performance and Wake of a Tidal Current Turbine," Energies, MDPI, vol. 14(4), pages 1-13, February.
    4. Ramin Alipour & Roozbeh Alipour & Seyed Saeid Rahimian Koloor & Michal Petrů & Seyed Alireza Ghazanfari, 2020. "On the Performance of Small-Scale Horizontal Axis Tidal Current Turbines. Part 1: One Single Turbine," Sustainability, MDPI, vol. 12(15), pages 1-25, July.
    5. Huang, Bin & Wang, Pengzhong & Wang, Lu & Cao, Tingfa & Wu, Dazhuan & Wu, Peng, 2021. "A combined method of CFD simulation and modified Beddoes-Leishman model to predict the dynamic stall characterizations of S809 airfoil," Renewable Energy, Elsevier, vol. 179(C), pages 1636-1649.

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