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Publicações
Rezanejad, K., Guedes Soares, C., López, I. e Carballo, R. (2017), “Experimental and numerical investigation of the hydrodynamic performance of an oscillating water column wave energy converter”, Renewable Energy, Vol. 106, pp. 1-16
The performance of an oscillating water column wave energy converter is investigated based on both
numerical and experimental approaches. The viscosity effects are neglected in the numerical approach
and the boundary integral equation method (BIEM) is implemented to solve the appropriate 2D
boundary value problem (BVP). The influence of turbine damping and wave period is evaluated in the
numerical model in both regular and random waves. A comprehensive experimental campaign is carried
out in both regular and irregular waves to validate the numerical results as well as to investigate the
influence of wave height, period and turbine damping on the efficiency of the converter. High and low
turbine damping conditions are imposed to the experimental model. It is found that both the numerical
and experimental results have a satisfactory agreement for the small wave amplitudes. It is detected that
the efficiency of the device is very sensitive to the variations in the turbine damping although the absolute
maximum efficiency is less sensitive to the slight alterations applied to the turbine damping. It is
observed in the experimental study that the influence of the wave height has less importance than the
other two parameters (turbine damping and incoming wave period) although the effect of the wave
height becomes prominent in high wave amplitudes and causes the efficiency of the device to become
less sensitive to variations in wave period and to tend to have an uniform value in wide wave period
ranges.
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