Numerical investigation on the wave interferences of submerged bodies operating near the free surface
| Autor: | Lin Zhai, Yang Qun, Li Dong, Zhen Wang, Chuan-lin He |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Wave interferences
lcsh:Ocean engineering 020101 civil engineering Ocean Engineering 02 engineering and technology Wake Computational fluid dynamics Interference (wave propagation) 01 natural sciences 010305 fluids & plasmas 0201 civil engineering symbols.namesake Kelvin waves lcsh:VM1-989 0103 physical sciences Froude number lcsh:TC1501-1800 Waveform Resistance force Physics business.industry lcsh:Naval architecture. Shipbuilding. Marine engineering Mechanics Wavelength Control and Systems Engineering Free surface Wake angle symbols business |
| Zdroj: | International Journal of Naval Architecture and Ocean Engineering, Vol 13, Iss, Pp 65-74 (2021) |
| ISSN: | 2092-6782 |
| Popis: | A key factor that governs the wave interferences of a submerged body is the dimensionless Froude number. Computational Fluid Dynamics (CFD) is used to describe the resistance force coefficients and the generated waves of two SUBOFF submarine models. Grid independence studies are performed on two cases, totally and shallowly submerged cases, with four sets of computing meshes. The highest peaks are marked by red points at given wavelengths, a line is fitted to those points with a least-squares approximation, and the half wake angle at multiple Froude numbers is defined between the fitted line and the centerline of the free surface. The results show that when the depth of the target is 1.1D, constructive interferences occur at Fn = 0.3 and 0.5, while destructive interference occurs at Fn = 0.35 with distortion of the waveform. The half wake angle is less than 19.47° because of the interference between the bow and stern wave systems. |
| Databáze: | OpenAIRE |
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