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Enabling the prediction of manoeuvring characteristics of a submarine operating near the free surface

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conference contribution
posted on 2023-05-23, 07:57 authored by Polis, CD, Susantha RanmuthugalaSusantha Ranmuthugala, Jonathan DuffyJonathan Duffy, Martin RenilsonMartin Renilson
Predicting the behaviour of a submarine operating close to the free surface is important in order to assess the merits of particular designs, identify the operational characteristics, and determine a safe operating envelope. To predict submarine behaviour near the free surface requires both a mathematical model that captures the dynamics of a submarine in motion, and an understanding of the additional forces and moments generated in the near surface region. In the past, submarine manoeuvring models in published literature have neglected the effect of the presence of the free surface, thus the authors are developing a coefficient based submarine manoeuvring model incorporating the effects of near surface operation. The hydrodynamic coefficients required for the model are obtained using Computational Fluid Dynamics (CFD) and validated against results from captive model experiments in the Australian Maritime College (AMC) towing tank. This paper describes hydrodynamic coefficients that can be added to existing submarine manoeuvring models to account for near surface effects in the vertical plane, for the SUBOFF geometry. Validated CFD predictions of the forces acting on a generic submarine operating near the free surface are presented along with empirically based equations to predict them.


Publication title

Proceedings of the Pacific 2013 International Maritime Conference


Broadbent, A




Australian Maritime College


The Royal Institution of Naval Architects; The Institute of Marine Engineering, Science and Technology; Engineers Australia

Place of publication


Event title

Pacific 2013 International Maritime Conference

Event Venue

Darling Harbour, Australia

Date of Event (Start Date)


Date of Event (End Date)


Rights statement

Copyright 2013 the authors

Repository Status

  • Open

Socio-economic Objectives

Emerging defence technologies

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    University Of Tasmania