Abstract: Hydrodynamic parameters on structures with porous elements can be significantly altered compared to those on solid structures. The use of a porous support structure for a floating wind turbine could potentially reduce platform motions and wave forces, correspondingly reducing adverse effects on the wind turbine, such as fatigue damage and loss in energy capture. This paper presents a Boundary Element Method (BEM) to calculate linear wave forces on solid structures with a porous wall bounding an interior volume of water. In the model, the shape of the solid and porous elements of the structure can take arbitrary shapes and be either surface-piercing or fully submerged. Initial verification results are presented against existing commercial BEM software for solid bodies and analytical results for solid/porous structures with simple geometries. In all cases, the comparisons show good agreement, giving confidence that the method can be used in more complex cases where analytical results cannot be derived.
2. G Deskos, S Laizet, MD Piggott
“Development and validation of the higher-order finite-difference wind farm simulator, WInc3D”
Abstract: High-fidelity wind farm models typically employ large–eddy simulation (LES) formulations and turbine parametrisations (eg actuator disc models) to resolve the turbine wakes at spatial and temporal scales so that all flow features of engineering improtance are well– captured. Such features include the low frequency dynamic wake meandering, which plays a key role in the fatigue loading experienced by downstream turbines clustered in arrays. By the term ‘wind farm simulator’ (WFS) we refer to an integrated framework
which offers these capabilities and can be used as a research tool to study wake–to–wake and turbine–to–wake interactions. In this work, we present a validation study for WInc3D, a WFS based on the powerful, sixth-order finite-difference flow solver, incompact3d. For our validation study, we use operational scenarios from the Horns Rev offshore wind farm. The comparison of the present model with existing supervisory control and data acquisition (SCADA) measurements and previous LES studies shows an overall good agreement.
3. Abhinav, K.A., Collu, M. and Baquero Gómez, J.I.
“Multi-purpose ocean energy platforms for offshore aquaculture farms”
Abstract: The Blue Growth strategy was laid out by the European Union (EU) in 2012 [1], with a view to realize sustainable development of the blue economy – based on the oceans, seas and coasts. Along the lines of the Blue Growth strategy, the present work investigates the performance of a multi-purpose platform (MPP) for use in an offshore aquaculture farm. The elements of offshore wind and fish feed storage are integrated in the same platform to support the energy demands of closely co-located aquaculture farms, at a location off the Scottish coast, with a water depth of 81 m. The work presented herein is part of the UK-China Investigation of the novel challenges of an integrated offshore multi-purpose platform (INNOMPP) project [2] (EPSRC Grant no. EP/R007497/1).
