Wave-power absorption from a finite array of oscillating wave surge converters
journal contributionposted on 26.03.2015, 16:34 by Emiliano RenziEmiliano Renzi, A. Abdolali, G. Bellotti, F. Dias
Semi-analytical and fully numerical modelling is developed in the framework of the inviscid potential flow theory to investigate the dynamics of a wave farm made by flap-type wave energy converters in the nearshore. The hydrodynamic parameters and the efficiency of the system in typical layouts are calculated with both models. Good agreement is shown between the two approaches. Parametric analysis undertaken with the semi-analytical model allows to identify a near-resonant phenomenon which is responsible for increasing the absorbed power by the single elements of the array. Such result could be used as a preliminary design criterion. The numerical model is then applied to analyse a configuration of practical engineering interest, i.e. an array of two staggered converters. The dynamics arising in this more complex system is explained, showing that non-symmetric layouts can be less effective.
The work of E.R. and F.D. was funded by Science Foundation Ireland (SFI) under the research project “High-end computational modelling for wave energy systems”. A.A. and G.B. would like to acknowledge the research projects FP7-OCEAN.2011-1 “MERMAID: Innovative Multi-purpose offshore platforms: planning, design and operation” and FP7-PEOPLE-2009-IRSES “Sim.COAST: Numerical Simulation Tools for Protection of Coasts against Flooding and Erosion”.
- Mathematical Sciences