Abstract
When building offshore wind turbines with mono-pile foundations, scour protection is typically
placed to avoid scouring of the soil close to the mono-pile. An important aspect is that the scour protection
itself causes erosion, inflicted by the local increase in the hydrodynamic field and in turn increased bed shear
stresses. Scour of the edge material alongside the scour protection may cause deformations and failure of the
scour protection. This can reduce the stability of the stone layer and cause exposure of cables running between
the mono-piles. The early stage results of an extensive experimental campaign to explain the edge sour process
in steady current is presented. The three-dimensional flow field around the pile and scour protection is resolved
by particle image velocimetry, showing a local increase in the hydrodynamic field leading to increased sediment
transport and scour. The governing process in steady current is a pair of symmetrical counter-rotating vortices
emerging in the near bed region in the wake of the pile and scour protection, causing a significant downstream
scour hole.
Original language | English |
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Title of host publication | Scour and Erosion |
Editors | Liang Cheng, Scott Draper, Hongwei An |
Publisher | CRC Press |
Publication date | 2014 |
Pages | 587-592 |
ISBN (Print) | 978-1-138-02732-9 |
Publication status | Published - 2014 |
Event | 7th International Conference on Scour and Erosion - Scarborough, Perth, Australia Duration: 2 Dec 2014 → 4 Dec 2014 Conference number: 7 |
Conference
Conference | 7th International Conference on Scour and Erosion |
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Number | 7 |
Country/Territory | Australia |
City | Scarborough, Perth |
Period | 02/12/2014 → 04/12/2014 |