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Experimental study on scour profile of pile-supported horizontal axis tidal current turbine

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  • Chen, Long
  • Hashim, Roslan
  • Othman, Faridah
  • Motamedi, Shervin

Abstract

The study aims to investigate the influence of tip clearance on the scour rate of pile-supported horizontal axis tidal current turbine (TCT) and also attempts to correlate time-dependent scour depth of TCT with the tip clearance. A physical model of TCT was placed in a flume for scour test and the scour rate of the fabricated model was investigated. The results suggest that the decrease in tip clearance increases the scour depth. In addition, the shortest tip clearance results in the fastest and most sediment transport. The maximum scour depth reached 18.5% of rotor diameter. Results indicate that regions susceptible to scour typically persist up to 1.0Dt downstream and up to 0.5Dt to either side of the turbine support centre. The majority of the scour occurred in the first 3.5 h. The maximum scour depth reaches equilibrium after 24 h test. An empirical formula to predict the time-dependent scour depth of pile-supported TCT is proposed.

Suggested Citation

  • Chen, Long & Hashim, Roslan & Othman, Faridah & Motamedi, Shervin, 2017. "Experimental study on scour profile of pile-supported horizontal axis tidal current turbine," Renewable Energy, Elsevier, vol. 114(PB), pages 744-754.
    • Handle: RePEc:eee:renene:v:114:y:2017:i:pb:p:744-754
    DOI: 10.1016/j.renene.2017.07.026
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    Cited by:

    1. Deng, Xu & Zhang, Jisheng & Lin, Xiangfeng, 2024. "Proposal of actuator line-immersed boundary coupling model for tidal stream turbine modeling with hydrodynamics upon scouring morphology," Energy, Elsevier, vol. 292(C).
    2. Escobar, A. & Negro, V. & López-Gutiérrez, J.S. & Esteban, M.D., 2019. "Assessment of the influence of the acceleration field on scour phenomenon in offshore wind farms," Renewable Energy, Elsevier, vol. 136(C), pages 1036-1043.
    3. Li, Xiaorong & Li, Ming & Amoudry, Laurent O. & Ramirez-Mendoza, Rafael & Thorne, Peter D. & Song, Qingyang & Zheng, Peng & Simmons, Stephen M. & Jordan, Laura-Beth & McLelland, Stuart J., 2020. "Three-dimensional modelling of suspended sediment transport in the far wake of tidal stream turbines," Renewable Energy, Elsevier, vol. 151(C), pages 956-965.
    4. Ramírez-Mendoza, R. & Murdoch, L. & Jordan, L.B. & Amoudry, L.O. & McLelland, S. & Cooke, R.D. & Thorne, P. & Simmons, S.M. & Parsons, D. & Vezza, M., 2020. "Asymmetric effects of a modelled tidal turbine on the flow and seabed," Renewable Energy, Elsevier, vol. 159(C), pages 238-249.

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