Numerical and Experimental Modelling of WECs

The design of a wave energy converter relies heavily on results from numerical simulations and experiments with scale models. Such results allow not only fun-damental design changes but also the optimisation of selected configurations. For ongoing development, and particularly at an early stage, numerical models give the flexibility of assessing a large number of versions at a relatively low cost. Physical models are then tested in wave tanks to validate the numerical simula-tions and to investigate phenomena which are not evidenced by the computational packages. This chapter provides an overview on the numerical techniques that have been used to model the hydrodynamics of wave energy converters (WECs), details on wavemaker and wave tank design, guidelines on experimental tech-niques and finally a case study related to one of the most studied concepts which reached the full-scale prototype stage.

[1]  Stephen H. Salter,et al.  Power from sea waves , 1974 .

[2]  Chia-Po Lin,et al.  Experimental studies of the hydrodynamic characteristics of a sloped wave energy device , 2000 .

[3]  J. Vugts The hydrodynamic coefficients for swaying, heaving and rolling cylinders in a free surface , 1968 .

[4]  D. V. Evans,et al.  Submerged cylinder wave energy device: theory and experiment , 1979 .

[5]  J. N. Newman Algorithms for the free-surface Green function , 1985 .

[6]  Ronald W. Yeung,et al.  Numerical Methods in Free-Surface Flows , 1982 .

[7]  Y.M.C. Delauré,et al.  A 3D Parametric Study of a Rectangular Bottom-Mounted OWC Power Plant , 2001 .

[8]  D. Thompson,et al.  Design Curves For Regular And Random Wave Generators , 1971 .

[9]  Gregory Sebastien Payne Numerical modelling of a sloped wave energy device , 2006 .

[10]  H. D. Maniar A three dimensional higher order panel method based on B-splines , 1995 .

[11]  D. Evans,et al.  Power From Water Waves , 1981 .

[12]  D. Evans A theory for wave-power absorption by oscillating bodies , 1976, Journal of Fluid Mechanics.

[13]  J. E. Romate Local error analysis in 3-D panel methods , 1988 .

[14]  D. V. Evans,et al.  Hydrodynamics of wave energy devices , 1993 .

[15]  Anthony Lewis,et al.  3D hydrodynamic modelling of fixed oscillating water column wave power plant by a boundary element methods , 2003 .

[16]  David John Skyner,et al.  Solo Duck Linear Analysis , 1987 .

[17]  T. Francis Ogilvie,et al.  First- and second-order forces on a cylinder submerged under a free surface , 1963, Journal of Fluid Mechanics.

[18]  S H Salter,et al.  Numerical and experimental modelling of a modified version of the Edinburgh Duck wave energy device , 2006 .

[19]  Chiang C. Mei,et al.  POWER EXTRACTION FROM WATER WAVES , 1976 .

[20]  Y. M. C. Delaure,et al.  An assessment of 3D boundary element methods for response prediction of generic OWCs , 2000 .

[21]  J. N. Newman,et al.  Boundary-Element Methods In Offshore Structure Analysis , 2002 .

[22]  J. Hess Panel Methods in Computational Fluid Dynamics , 1990 .

[23]  Paul Nebel Optimal Control of a Duck , 1992 .

[24]  Jamie R.M. Taylor,et al.  Fourth year report on Edinburgh Wave Power Project : Study on mechanisms for extracting power from sea waves (Volume 2) , 1978 .

[25]  C. M. Linton,et al.  RADIATION AND DIFFRACTION OF WATER WAVES BY A SUBMERGED SPHERE IN FINITE DEPTH , 1991 .

[26]  J. Falnes Ocean Waves and Oscillating Systems , 2002 .

[27]  Arthur E. Mynett,et al.  Characteristics of Salter's cam for extracting energy from ocean waves , 1979 .

[28]  T. Havelock,et al.  LXXI. The damping of the heaving and pitching motion of a ship , 1942 .

[29]  Felice Arena,et al.  Caisson breakwaters embodying an OWC with a small opening—Part II: A small-scale field experiment , 2007 .

[30]  Johan Egbert Romate The numerical simulation of nonlinear gravity waves in three dimensions using a higher order panel method , 1989 .

[31]  Y. Ouellet,et al.  A survey of wave absorbers , 1986 .

[32]  Patrick Roache,et al.  Error Bars for CFD , 2003 .

[33]  Jørgen Fredsøe,et al.  Hydrodynamics Around Cylindrical Structures , 2006 .

[34]  R. Eatock Taylor,et al.  Variability of hydrodynamic load predictions for a tension leg platform , 1986 .

[35]  P. Roache QUANTIFICATION OF UNCERTAINTY IN COMPUTATIONAL FLUID DYNAMICS , 1997 .

[36]  John L Hess,et al.  CALCULATION OF NON-LIFTING POTENTIAL FLOW ABOUT ARBITRARY THREE-DIMENSIONAL BODIES , 1962 .

[37]  B. Lemehaute An introduction to hydrodynamics and water waves , 1976 .

[38]  T. Sarpkaya,et al.  Mechanics of wave forces on offshore structures , 1981 .

[39]  Steven A Hughes,et al.  PHYSICAL MODELS AND LABORATORY TECHNIQUES IN COASTAL ENGINEERING , 1993 .

[40]  C. Mei The applied dynamics of ocean surface waves , 1983 .