A theory for wave-power absorption by oscillating bodies | Journal of Fluid Mechanics | Cambridge Core (original) (raw)

Abstract

A theory is given for predicting the absorption of the power in an incident sinusoidal wave train by means of a damped, oscillating, partly or completely submerged body. General expressions for the efficiency of wave absorption when the body oscillates in one or, in some cases, two modes are given. It is shown that 100% efficiency is possible in some cases. Curves describing the variation of efficiency and amplitude of the body with wavenumber for various bodies are presented.

Type

Research Article

References

Budal, K. & Falnes, J. 1975 A resonant point absorber of ocean-wave power.Nature,256,478–479.Google Scholar

Frank, W. 1967 Oscillation of cylinders on or below the free surface of deep fluids.N.S.R.D.C. Rep. no. 2375.Google Scholar

Haskind, M. D. 1957 The exciting forces and wetting of ships in waves.Izv. Akad. Nauk SSSR, Otd. Tekh. Nauk,7,65–79. (English trans. David Taylor Model Basin Tram. no. 307.)Google Scholar

Havelock, T. H. 1955 Waves due to a floating sphere making periodic heaving oscillations.Proc. Roy. Soc. A231,1–7.Google Scholar

Ktik, J. 1963 Damping and inertia coefficients for a rolling or swaying vertical strip.J. Ship Res. 7,19–23.Google Scholar

Kotik, J. & Manculis, V. 1962 On the Kramers-Kronig relations for ship motions.Int. Shipbldg Prog. 9,3–10.Google Scholar

Newman, J. N. 1962 The exciting forces on fixed bodies in waves.J. Ship Reg. 6,10–17.Google Scholar

Newman, J. N. 1975 Interaction of waves with two-dimensional obstacles: a relation between the radiation and scattering problems.J. Fluid Mech. 71 273–282.Google Scholar

Ogilvie, T. F. 1963 First-and second-order forces on a cylinder submerged under a free surface.J. Pluid Mech. 16,451–472.Google Scholar

Ursell, F. 1948 On the waves due to the rolling of a ship.Quart. J. Mech. Appl. Math. 1,246–252.Google Scholar