Applied hydrodynamic wave-resistance computation by Fourier transform

✍ Scribed by Jorge D'Elia; Mario A. Storti; Sergio R. Idelsohn

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 134 KB
• Volume: 29
• Category: Article
• ISSN: 0029-8018
• DOI: 10.1016/s0029-8018(00)00073-1

✦ Synopsis

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 un-perturbed 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 downstream like fifteen ship-lengths.