Technical noteMaximum wave power absorption by flexible line attenuators
Section snippets
Background
In 1976, Newman published a seminal hydrodynamic study where the last section is dedicated to wave energy extraction [1]. Based on this work, the maximum wave power absorption characteristics of slender flexible rafts (line attenuators) in head seas were theoretically determined [2,3]. Shortly thereafter, Farley analyzed and experimentally tested such a device subject to wavelike deformations focused in the forward direction (along the incident wave) [4]. Some theoretical evidence that this
Discussion
Consider an incident linear wave of amplitude A, circular frequency ω and wavenumber k traveling forward along the x-axis over deep water. Note that the time-dependence exp(−iωt) is chosen here. For a stationary wave power converter subject to vertical displacements of the form , where vn is the non-dimensional complex displacement amplitude for mode fn, the following expression for the absorption width was derived [2]:
The Kochin function Hn is defined
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Absorption of wave energy by elongated bodies
Applied Ocean Research
(1979)Wave energy conversion by flexible resonant rafts
Applied Ocean Research
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Maximum wave-power absorption by attenuating line absorbers under volume constraints
Applied Ocean Research
(2013)
Cited by (1)
Maximum wave power absorption by slender bodies of arbitrary cross sections in oblique seas
2014, Applied Ocean ResearchCitation Excerpt :In Section 5, results are presented for the forward wavelike deformations of a flexible slender body. Such systems, undergoing vertical motions in head seas, have been studied before [8–10]. Next, the more practical case of a two-hinge articulated raft unrestrained in heave and pitch is considered, as in Newman [5].