Experimental and numerical investigations of a two-body floating-point absorber wave energy converter in regular waves

Xu, Qianlong; Li, Ye; Yu, Yi-Hsiang; Ding, Boyin; Jiang, Zhiyu; Lin, Zhiliang; Cazzolato, Benjamin

doi:10.1016/j.jfluidstructs.2019.03.006

Title: Experimental and numerical investigations of a two-body floating-point absorber wave energy converter in regular waves

Journal Article · Thu Sep 05 00:00:00 EDT 2019 · Journal of Fluids and Structures

DOI:https://doi.org/10.1016/j.jfluidstructs.2019.03.006· OSTI ID:1567026

Xu, Qianlong ^[1]; Li, Ye ^[1];

^[2]; Ding, Boyin ^[3]; Jiang, Zhiyu ^[4]; Lin, Zhiliang ^[1]; Cazzolato, Benjamin ^[3]

Shanghai Jiao Tong Univ. (China)
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Univ. of Adelaide, SA (Australia)
Univ. of Agder, Grimstad (Norway)

This paper presents experimental and numerical studies on the hydrodynamics of a two-body floating-point absorber (FPA) wave energy converter (WEC) under both extreme and operational wave conditions. In this study, the responses of the WEC in heave, surge, and pitch were evaluated for various regular wave conditions. For extreme condition analysis, we assume the FPA system has a survival mode that locks the power-take-off (PTO) mechanism in extreme waves, and the WEC moves as a single body in this scenario. A series of Reynolds-averaged Navier-Stokes (RANS) simulations was performed for the survival condition analysis, and the results were validated with the measurements from experimental wave tank tests. For the FPA system in operational conditions, both a boundary element method (BEM) and the RANS simulations were used to analyze the motion response and power absorption performance. Additional viscous damping, primarily induced by flow separation and vortex shedding, is included in the BEM simulation as a quadratic drag force proportional to the square of body velocity. The inclusion of viscous drag improves the accuracy of BEM's prediction of the heave response and the power absorption performance of the FPA system, which agrees well with experimental data and the RANS simulation results over a broad range of incident wave periods, except near resonance in large wave height scenarios. Overall, the experimental and numerical results suggest that nonlinear effects, caused by viscous damping and interaction between waves and the FPA, significantly influence the system response and power absorption performance. Nonlinear effects were found to be particularly significant when the wave height was large and the period was near or shorter than the resonant period of the FPA system. The study is expected to be helpful for understanding the nonlinear interaction between waves and the FPA system so that the structure of the FPA can be adequately designed.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Wind and Water Technologies Office (EE-4W)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1567026

Alternate ID(s):: OSTI ID: 1693616

Report Number(s):: NREL/JA-5000-73581

Journal Information:: Journal of Fluids and Structures, Vol. 91; ISSN 0889-9746

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 25 works

Citation information provided by
Web of Science

References (15)

A linear numerical model for analysing the hydroelastic response of a flexible electroactive wave energy converter Babarit, Aurélien; Singh, Jitendra; Mélis, Cécile Journal of Fluids and Structures, Vol. 74 https://doi.org/10.1016/j.jfluidstructs.2017.06.003	journal	October 2017
Experimental and numerical comparisons of self-reacting point absorber wave energy converters in regular waves Beatty, Scott J.; Hall, Matthew; Buckham, Bradley J. Ocean Engineering, Vol. 104 https://doi.org/10.1016/j.oceaneng.2015.05.027	journal	August 2015
Laboratory experiment on heaving body with hydraulic power take-off and latching control Bjarte-Larsson, T.; Falnes, J. Ocean Engineering, Vol. 33, Issue 7 https://doi.org/10.1016/j.oceaneng.2005.07.007	journal	May 2006
A coupled hydrodynamic–structural model of the M4 wave energy converter Eatock Taylor, R.; Taylor, P. H.; Stansby, P. K. Journal of Fluids and Structures, Vol. 63 https://doi.org/10.1016/j.jfluidstructs.2016.02.009	journal	May 2016
Wave-Energy Conversion Through Relative Motion Between Two Single-Mode Oscillating Bodies Falnes, J. Journal of Offshore Mechanics and Arctic Engineering, Vol. 121, Issue 1 https://doi.org/10.1115/1.2829552	journal	February 1999
Wave energy parks with point-absorbers of different dimensions Göteman, Malin Journal of Fluids and Structures, Vol. 74 https://doi.org/10.1016/j.jfluidstructs.2017.07.012	journal	October 2017
The forces on sharp-edged cylinders in oscillatory flow at low Keulegan–Carpenter numbers Graham, J. M. R. Journal of Fluid Mechanics, Vol. 97, Issue 02 https://doi.org/10.1017/S0022112080002595	journal	March 1980
A synthesis of numerical methods for modeling wave energy converter-point absorbers Li, Ye; Yu, Yi-Hsiang Renewable and Sustainable Energy Reviews, Vol. 16, Issue 6 https://doi.org/10.1016/j.rser.2011.11.008	journal	August 2012
On the use of discrete seasonal and directional models for the estimation of extreme wave conditions L. Mackay, Edward B.; Challenor, Peter G.; Bahaj, AbuBakr S. Ocean Engineering, Vol. 37, Issue 5-6 https://doi.org/10.1016/j.oceaneng.2010.01.017	journal	April 2010
Wave power Salter, S. H. Nature, Vol. 249, Issue 5459 https://doi.org/10.1038/249720a0	journal	June 1974
Heave motion suppression of a Spar with a heave plate Tao, Longbin; Cai, Shunqing Ocean Engineering, Vol. 31, Issue 5-6 https://doi.org/10.1016/j.oceaneng.2003.05.005	journal	April 2004
Wave Power Absorption as a Function of Water Level and Wave Height: Theory and Experiment Tyrberg, Simon; Waters, Rafael; Leijon, Mats IEEE Journal of Oceanic Engineering, Vol. 35, Issue 3 https://doi.org/10.1109/JOE.2010.2052692	journal	July 2010
An improved boundary element method for modelling a self-reacting point absorber wave energy converter Xu, Qian-Long; Li, Ye; Lin, Zhi-Liang Acta Mechanica Sinica, Vol. 34, Issue 6 https://doi.org/10.1007/s10409-018-0792-x	journal	September 2018
Reynolds-Averaged Navier–Stokes simulation of the heave performance of a two-body floating-point absorber wave energy system Yu, Yi-Hsiang; Li, Ye Computers & Fluids, Vol. 73 https://doi.org/10.1016/j.compfluid.2012.10.007	journal	March 2013
Non-linear numerical modeling and experimental testing of a point absorber wave energy converter Zurkinden, A. S.; Ferri, F.; Beatty, S. Ocean Engineering, Vol. 78 https://doi.org/10.1016/j.oceaneng.2013.12.009	journal	March 2014

Similar Records

Optimum power analysis of a self-reactive wave energy point absorber with mechanically-driven power take-offs

Journal Article · Fri Jan 17 00:00:00 EST 2020 · Energy (Oxford) · OSTI ID:1567026

Li, Xiaofan; Liang, Changwei; Chen, Chien-An; +3 more

Tank Test of an Active Power Rectification in Wave-to-Wire Energy Conversion

Conference · Mon Sep 30 00:00:00 EDT 2019 · OSTI ID:1567026

Chen, ChienAn; Li, Xiaofan; Martin, Dillon; +1 more

RANS Simulation of the Heave Response of a Two-Body Floating Point Wave Absorber: Preprint

Conference · Tue Mar 01 00:00:00 EST 2011 · OSTI ID:1567026

Yu, Y; Li, Y

Related Subjects

16 TIDAL AND WAVE POWER
wave energy
floating-point absorber
experimental test
Reynolds-averaged Navier-Stokes equations
boundary element method
viscous damping
nonlinear effect

Title: Experimental and numerical investigations of a two-body floating-point absorber wave energy converter in regular waves

Citation Formats

References (15)

Similar Records

Related Subjects