Analytical and computational approach for studying the interaction between waves and cylindrical wave energy converters oscillating in two modes
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/333256
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Ocean wave energy may be recovered by oscillating wave energy converters. The
energy converter studied in this work is a horizontally orientated cylinder which may be placed
at different depths in the sea. The cylinder can oscillate in horizontal and vertical directions and
transfer mechanical energy forward by hydraulic cylinders. To study the interaction between the
waves and the converter, we have used potential flow theory separately for both the waves and
the oscillating cylinder, and then combined these potential functions by using the principle of
superposition. Combined potential flow fields, together with Euler’s equations, enable us to
obtain the pressure distribution around the cylinder. When knowing the pressure distribution,
both the force upon the cylinder, and the net mechanical power transferred from the waves to the
moving cylinder, can be calculated. With this model we have analyzed several interesting topics
which affect the efficiency of the wave energy converter. The phase shift is the most important
parameter - with the phase shift π/2 the best efficiency 0.5 was achieved. To achieve the right
phase shift for different waves is essential due to the power capture. Furthermore it is shown that
feedback control is necessary for keeping the phase shift constant. Also the cylinder radius has a
great effect on the efficiency. The other important parameters studied in this work were the wave
height and the wave period.
CitacióHeikkinen, H.K.; Lampinen, M.J.; Böling, J.M. Analytical and computational approach for studying the interaction between waves and cylindrical wave energy converters oscillating in two modes. A: . CIMNE, 2011, p. 413-425.
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