TY - JOUR
T1 - Wave power extraction from a floating elastic disk-shaped wave energy converter
AU - Zheng, Siming
AU - Michele, Simone
AU - Liang, Hui
AU - Meylan, Michael H.
AU - Greaves, Deborah
PY - 2022/10/10
Y1 - 2022/10/10
N2 - In this paper, a concept of a floating elastic wave energy converter consisting of a
disk-shaped elastic plate is proposed. The floating plate is moored to the seabed through
a series of power take-off (PTO) units. A theoretical model based on the linear potential
flow theory and eigenfunction matching method is developed to study the hydroelastic
characteristics and evaluate wave power absorption of the device. The PTO system is
simulated as a discrete PTO, and moreover, it is also modelled as a continuum PTO to
represent the case when the PTO system is composed of a large number of PTO units. The
continuum PTO approximation is tested against the discrete PTO simulation for accuracy.
Two methods are proposed to predict the wave power absorption of the device. After
running convergence analysis and model validation, the present model is employed to
do a multiparameter impact analysis. The device adopting a continuum PTO system is
found to capture wave power efficiently in an extensive range of wave frequencies. For the
continuum PTO system, it is theoretically possible to adopt optimised PTO damper and
stiffness/mass to guarantee the absorption of 100 % of the energy flux available in one
circular component of the plane incident wave.
AB - In this paper, a concept of a floating elastic wave energy converter consisting of a
disk-shaped elastic plate is proposed. The floating plate is moored to the seabed through
a series of power take-off (PTO) units. A theoretical model based on the linear potential
flow theory and eigenfunction matching method is developed to study the hydroelastic
characteristics and evaluate wave power absorption of the device. The PTO system is
simulated as a discrete PTO, and moreover, it is also modelled as a continuum PTO to
represent the case when the PTO system is composed of a large number of PTO units. The
continuum PTO approximation is tested against the discrete PTO simulation for accuracy.
Two methods are proposed to predict the wave power absorption of the device. After
running convergence analysis and model validation, the present model is employed to
do a multiparameter impact analysis. The device adopting a continuum PTO system is
found to capture wave power efficiently in an extensive range of wave frequencies. For the
continuum PTO system, it is theoretically possible to adopt optimised PTO damper and
stiffness/mass to guarantee the absorption of 100 % of the energy flux available in one
circular component of the plane incident wave.
UR - https://pearl.plymouth.ac.uk/context/secam-research/article/1524/viewcontent/wave_power_extraction_from_a_floating_elastic_disk_shaped_wave_energy_converter.pdf
U2 - 10.1017/jfm.2022.701
DO - 10.1017/jfm.2022.701
M3 - Article
SN - 0022-1120
VL - 0
JO - Journal of Fluid Mechanics
JF - Journal of Fluid Mechanics
IS - 0
ER -