Numerical simulation of an oscillating water column wave energy converter with and without damping
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/333160
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
This paper presents numerical simulations that predict the action of a regular
incident wave on a simplified Oscillating Water Column Ocean Wave Energy Converter
(OWC-OWEC) model. This model is a vertical tube of small circular cross-section placed in
the longitudinal symmetry plane of the flume. The paper presents a comparison of numerical
results, obtained by a Reynolds-Average-Navier-Stokes (RANS) solver, with experimental
data obtained in a wave flume. The numerical code uses a finite-volume method to solve the
RANS equations and the Volume of Fluid (VOF) approach to capture the water free surface.
The OWC power output is estimated by the pressure drop across the dissipative device
(turbine) times the volume flow rate. In the physical model, the turbine’s damping effect was
simulated by a piece of porous membrane (textile) placed at the top of the vertical tube. To
simulate this dissipative effect in the numerical simulations, a pressure drop at the top
boundary of the vertical cylinder was imposed. The water free-surface elevation time-series,
inside and outside of the cylinder, and the resulting amplification factor obtained by the
numerical code are compared with the experimental data for a regular incident wave with
0.015m height and frequency between 0.55 and 1.6Hz. Good concordance is obtained
between numerical and experimental results, as it was also found in previous studies for the
same configuration without damping.
CitacióDidier, E.; Paixão Conde, J.M.; Teixeira, P.R.F. Numerical simulation of an oscillating water column wave energy converter with and without damping. A: . CIMNE, 2011, p. 206-217.
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