Print Email Facebook Twitter Estimating the stability of a bed protection of a weir-mounted tidal turbine Title Estimating the stability of a bed protection of a weir-mounted tidal turbine Author Verbeek, Merel C. (TU Delft Environmental Fluid Mechanics) Labeur, R.J. (TU Delft Environmental Fluid Mechanics) Uijttewaal, W.S.J. (TU Delft Environmental Fluid Mechanics) Date 2020 Abstract Coastal infrastructure, such as bridges and storm surge barriers with weirs, provides an attractive location for harvesting renewable energy using tidal turbines. Often stone layers are applied downstream of coastal infrastructure to protect the sea bed from erosion. However, little is known about the potential effect of tidal energy extraction on the stability of this granular bed protection. This paper describes a study of the flow conditions influencing the stability of the bed protection downstream of a weir-mounted tidal turbine, using hydrodynamic data of an experimental test. The analysis indicates that the flow recirculation zone downstream of a weir may become shorter and flatter due to the presence of a horizontal-axis turbine. As a result, energetic turbulence eddies can transport more horizontal momentum towards the bed - hence the reason a heavier bed protection may be required for granular beds downstream of weirs when a turbine is installed. This information is essential when designing safe bed protections for coastal infrastructure with tidal turbines. Subject Bed stabilityExperimentsTidal turbineTurbulence To reference this document use: http://resolver.tudelft.nl/uuid:3f0a522f-8f23-4565-a9b8-48f6836b042a DOI https://doi.org/10.36688/imej.3.21-24 Source International Marine Energy Journal, 3 (1), 21-24 Part of collection Institutional Repository Document type journal article Rights © 2020 Merel C. Verbeek, R.J. Labeur, W.S.J. Uijttewaal Files PDF document.pdf 818.16 KB Close viewer /islandora/object/uuid:3f0a522f-8f23-4565-a9b8-48f6836b042a/datastream/OBJ/view