Investigation on the hydrodynamic scaling effect of an OWC type wave energy device using experiment and CFD simulation

Abstract This paper presents a study of the effect of model scale on the performance of a fixed Oscillating Water Column (OWC) type Wave Energy Converter (WEC). Tank tests at two different scales, including the effect of scaling of the test tanks to minimise the bias introduced by different wave blockage effects. CFD simulations based on Reynolds Average Navier Stokes (RANS) method were then carried out for both scaled OWCs to investigate whether CFD simulation is able to reproduce the scale effect. Comparison between the tank test results and the CFD simulation results suggests that CFD simulation is capable of reproducing the hydrodynamic scaling effect with a good accuracy. Results also suggest that the hydrodynamic scaling effect is mainly introduced by the Reynolds number effect for cases investigated in the current study.

[1]  Irene Penesis,et al.  Hydrodynamic modelling of marine renewable energy devices : a state of the art review , 2015 .

[2]  A. J. N. A. Sarmento,et al.  Wave flume experiments on two-dimensional oscillating water column wave energy devices , 1992 .

[3]  Qingping Zou,et al.  Air–water two-phase flow modelling of hydrodynamic performance of an oscillating water column device , 2012 .

[4]  Arun Kamath,et al.  Numerical investigations of the hydrodynamics of an oscillating water column device , 2015 .

[5]  Enrico Foti,et al.  Scale effects in physical modelling of a generalized OWC , 2018, Ocean Engineering.

[6]  António F.O. Falcão,et al.  Wave energy utilization: A review of the technologies , 2010 .

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

[8]  Aun Haider,et al.  Review of ocean tidal, wave and thermal energy technologies , 2017 .

[9]  Wanan Sheng,et al.  Physical modelling of wave energy converters , 2014 .

[10]  António Sarmento,et al.  Wave generation by an oscillating surface-pressure and its application in wave-energy extraction , 1985, Journal of Fluid Mechanics.

[11]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[12]  Gregor Macfarlane,et al.  Scaling and air compressibility effects on a three-dimensional offshore stationary OWC wave energy converter , 2017 .

[13]  COUPLING OF 3D NUMERICAL SOLUTION METHOD BASED ON NAVIER-STOKES EQUATIONS WITH SOLUTIONS BASED ON SIMPLER THEORIES , 2014 .

[14]  B. Teng,et al.  An experimental investigation of hydrodynamics of a fixed OWC Wave Energy Converter , 2016 .

[15]  F. Menter.  Improved two-equation k-omega turbulence models for aerodynamic flows , 1992 .

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

[17]  Gregorio Iglesias,et al.  Optimisation of turbine-induced damping for an OWC wave energy converter using a RANS–VOF numerical model , 2014 .

[18]  Abdüsselam Altunkaynak,et al.  Comparison of numerical and experimental analyses for optimizing the geometry of OWC systems , 2017 .

[19]  P. Alam,et al.  H , 1887, High Explosives, Propellants, Pyrotechnics.

[20]  Jim O’Sullivan,et al.  Ringing Analysis of a Vertical Cylinder by Euler Overlay Method , 2012 .

[21]  G. Fitzgerald,et al.  'I. , 2019, Australian journal of primary health.

[22]  Joao Cruz,et al.  Ocean Wave Energy: Current Status and Future Prespectives , 2008 .

[23]  Tadeusz Koronowicz,et al.  COMPARISON OF CICSAM AND HRIC HIGH-RESOLUTION SCHEMES FOR INTERFACE CAPTURING , 2008 .

[24]  Sung Bum Yoon,et al.  Numerical simulations using momentum source wave-maker applied to RANS equation model , 2009 .

[25]  C. W. Hirt,et al.  Volume of fluid (VOF) method for the dynamics of free boundaries , 1981 .

[26]  P. Alam.  ‘A’ , 2021, Composites Engineering: An A–Z Guide.