Applied hydrodynamic wave-resistance computation by Fourier transform

D'ELÍA, JORGE; STORTI, MARIO; IDELSHON, SERGIO

OCEAN ENGINEERING

Elsevier

Lugar: Oxford; Año: 2002 vol. 29 p. 261 - 278

0029-8018

An applied Fourier transform computation for the hydrodynamic wave-resistance coefficient is shown, oriented to potential flows with a free surface and infinity depth. The presence of a ship-like body is simulated by its equivalent pressure disturbance imposed on the unperturbed free surface, where a linearized free surface condition is used. The wave-resistance coefficient is obtained from the wave-height downstream. Two examples with closed solutions are considered: a submerged dipole, as a test-case, and a parabolic pressure distribution of compact support. In the three dimensional case, a dispersion relation is included which is a key resource for an inexpensive computation of the wave-pattern far down-stream like fifteen ship-lengths.