CFD Research on the Hydrodynamic Performance of Submarine Sailing near the Free Surface with Long-Crested Waves

The simulations of submarine sailing near the free surface with long-crested waves have been conducted in this study using an in-house viscous URANS solver with an overset grid approach. First, the verification and validation procedures were performed to evaluate the reliability, with the results sh...

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Bibliographic Details
Published inJournal of marine science and engineering Vol. 10; no. 1; p. 90
Main Authors Dong, Kai, Wang, Xianzhou, Zhang, Donglei, Liu, Liwei, Feng, Dakui
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.01.2022
Subjects
CFD
Depth
Experiments
Fluid dynamics
free surface
Free surfaces
Geometry
hydrodynamic
Hydrodynamics
Influence
Irregular waves
Kinematics
Long-crested waves
Numerical analysis
Pressure distribution
Radiation
Reliability analysis
Reynolds number
Sailing
Simulation
Submarines
submerged
Vehicles
Vortices
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Summary:The simulations of submarine sailing near the free surface with long-crested waves have been conducted in this study using an in-house viscous URANS solver with an overset grid approach. First, the verification and validation procedures were performed to evaluate the reliability, with the results showing that the generation of irregular waves is adequately accurate and the results of total resistance are in good agreement with EFD. Next, three different submerged depths ranging from 1.1D to 3.3D were selected and the corresponding conditions of submarine sailing near calm water were simulated, the results of which were then compared with each other to investigate the influence of irregular waves and submerged depths. The simulations of the model near calm water at different submerged depths demonstrated that the free surface will cause increasing resistance, lift, and bow-up moments of the model, and this influence decreases dramatically with greater submerged depths. The results of the irregular wave simulations showed that irregular waves cause considerable fluctuations of hydrodynamic force and moments, and that this influence remains even at a deeper submerged depth, which can complicate the control strategies of the submarine. The response spectrum of hydrodynamic forces and moments showed slight amplitudes in the high-frequency region, and the model showed less sensitivity to high-frequency excitations.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse10010090