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This paper presents the initial development towards the modelling of a free running simulation to examine the manoeuvring performance of self-propelled underwater vehicles. The simulation consists of a coupled Computational Fluid Dynamics (CFD) and Rigid Body Dynamics (RBD) model that enables the prediction of the vehicle’s hydrodynamic characteristics and trajectory. It uses a Moving Domain Technique (MDT) that overcomes grid deformation and boundary limitation issues. The CFD model was validated against Experimental Fluid Dynamics (EFD) data for a prolate spheroid and a generic bare hull (SUBOFF), with the coupled model verified for the two hulls by undergoing straight line manoeuvres. An actuator disk propeller was then added to a fully appended SUBOFF model to simulate a 1-DOF self-propelled free running vehicle. Future work is in progress to expand the capability of the model for 6-DOF manoeuvring simulations. The model is intended as a cost effective tool to complement free running experimental work, hence reducing the reliance on specialised experimental equipment and providing a tool that can predict manoeuvring conditions beyond experimental limitations.

Item Type:	Refereed Conference Paper
Keywords:	AUV, Free running, CFD
Research Division:	Engineering
Research Group:	Maritime engineering
Research Field:	Ship and platform structures (incl. maritime hydrodynamics)
Objective Division:	Transport
Objective Group:	Water transport
Objective Field:	Water transport not elsewhere classified
UTAS Author:	Kim, H (Mr Howan Kim)
UTAS Author:	Leong, ZQ (Dr Zhi Leong)
UTAS Author:	Ranmuthugala, SD (Professor Dev Ranmuthugala)
UTAS Author:	Chin, C (Dr Chris Chin)
UTAS Author:	Forrest, A (Dr Alexander Forrest)
ID Code:	104127
Year Published:	2015
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2015-11-03
Last Modified:	2018-04-05
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