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Numerical validation of the hydrodynamic drag of a surfaced and fully appended underwater vehicle

Underwater Vehicles (UV) are required to travel on the surface for periods of time to complete mission requirements. However, knowledge on the drag of a surfaced UV is scarce in the public domain and the knowledge on the behaviour of surface craft is generally not applicable due to substantial differences in hull form. This paper presents a numerical study on the drag coefficient of a surfaced and fully appended BB2 UV in calm water. The results were firstly validated with the available experimental drag data for a range of speeds. Secondly, the free surface elevation along the length of the UV photographed during physical model scale experiments is compared to the free surface elevation predicted by CFD. This research has shown that a multiphase CFD model can accurately predict the drag due to the forward motion of a surfaced UV in calm water.

History

Publication title

International Journal of Maritime Engineering

Volume

64

Pagination

17-26

ISSN

1479-8751

Department/School

Australian Maritime College

Publisher

Royal Institution of Naval Architects

Place of publication

United Kingdom

Rights statement

© 2022: The Royal Institution of Naval Architects.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in engineering

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