Temporal Evolution of Seabed Scour Induced by Darrieus-Type Tidal Current Turbine

S.M. Chong, Wei-Haur Lam, Su Shiung Lam, Li-Ming Dai, Gerard Hamill

Research output: Contribution to journalArticle

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Abstract

The temporal evolution of seabed scour was investigated to prevent damage around a monopile foundation for Darrieus-type tidal current turbine. Temporal scour depths and profiles at various turbine radius and tip clearances were studied by using the experimental measurements.
Experiments were carried out in a purpose-built recirculating water flume associated with 3D printed turbines. The scour hole was developed rapidly in the initial process and grew gradually. The ultimate equilibrium of scour hole was reached after 180 min. The scour speed increased with the existence of a rotating turbine on top of the monopile. The findings suggested that monopile
foundation and the rotating turbine are two significant considerations for the temporal evolution of scour. The scour depth is inversely correlated to the tip-bed clearance between the turbine and seabed. Empirical equations were proposed to predict the temporal scour depth around turbine.
These equations were in good agreement with the experimental data.
Original languageEnglish
Article numberwater-481715
Pages (from-to)1
Number of pages22
JournalWater
Volume11
DOIs
Publication statusPublished - 28 Apr 2019

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turbines
Scour
scour
tidal current
temporal evolution
turbine
tides
Turbines
damages
water
experiment
Water
damage

Keywords

  • seabed scour; tidal current turbine; ocean renewable energy

Cite this

Chong, S.M. ; Lam, Wei-Haur ; Lam, Su Shiung ; Dai, Li-Ming ; Hamill, Gerard. / Temporal Evolution of Seabed Scour Induced by Darrieus-Type Tidal Current Turbine. In: Water. 2019 ; Vol. 11. pp. 1.
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Temporal Evolution of Seabed Scour Induced by Darrieus-Type Tidal Current Turbine. / Chong, S.M.; Lam, Wei-Haur; Lam, Su Shiung; Dai, Li-Ming; Hamill, Gerard.

In: Water, Vol. 11, water-481715, 28.04.2019, p. 1.

Research output: Contribution to journalArticle

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T1 - Temporal Evolution of Seabed Scour Induced by Darrieus-Type Tidal Current Turbine

AU - Chong, S.M.

AU - Lam, Wei-Haur

AU - Lam, Su Shiung

AU - Dai, Li-Ming

AU - Hamill, Gerard

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AB - The temporal evolution of seabed scour was investigated to prevent damage around a monopile foundation for Darrieus-type tidal current turbine. Temporal scour depths and profiles at various turbine radius and tip clearances were studied by using the experimental measurements.Experiments were carried out in a purpose-built recirculating water flume associated with 3D printed turbines. The scour hole was developed rapidly in the initial process and grew gradually. The ultimate equilibrium of scour hole was reached after 180 min. The scour speed increased with the existence of a rotating turbine on top of the monopile. The findings suggested that monopilefoundation and the rotating turbine are two significant considerations for the temporal evolution of scour. The scour depth is inversely correlated to the tip-bed clearance between the turbine and seabed. Empirical equations were proposed to predict the temporal scour depth around turbine.These equations were in good agreement with the experimental data.

KW - seabed scour; tidal current turbine; ocean renewable energy

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