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Hydrodynamic design of underwater gliders using k-kL-ω Reynolds Averaged Navier-Stokes Transition Model

Hydrodynamic design of underwater gliders using k-kL-ω Reynolds Averaged Navier-Stokes Transition Model
Hydrodynamic design of underwater gliders using k-kL-ω Reynolds Averaged Navier-Stokes Transition Model
Hydrodynamic design of an underwater glider is an act of balancing the requirement for a streamlined, hydrodynamically effective shape and the consideration of the practical aspects of the intended operational envelope of the vehicle, such as its ability to deploy a wide range of sensors across the water column. Key challenges in arriving at a successful glider design are discussed and put them in the context of existing autonomous underwater vehicles (AUV) of this type. The design cycle of a new vehicle shape is then described. The discussed AUV will operate both as an buoyancy-propelled glider and a flight-style, propellerdriven submersible, utilising its large size to deliver substantial scientific payloads to remote locations to perform environmental monitoring, seabed survey, and exploration for sub-sea oil, gas and material deposits. Emphasis is put on using computational fluid dynamic (CFD) methods capable of predicting laminar-turbulent transition of the flow in order to estimate the performance of candidate designs and thus inform and guide the evolution of the vehicle. A range of considered shapes are therefore described and their hydrodynamic characteristics predicted using CFD are summarised. A final shape for the new glider is then proposed. This is then subject to an in-depth flow-field analysis which points out how natural laminar flow may be used as a means of drag reduction without compromising the practical aspects of the design, such as its ability to carry sufficient payload. Finally, the obtained data are used to project the expected glide paths, as well as give preliminary estimates of its range. These show the benefits of minimising the vehicle drag, as well as highlight the possible trade offs between maximising speed and endurance of
the AUV.
Buoyancy, CFD, Drag, Engines, fluid dynamics, Hydrodynamics, Mathematical model, performance prediction, Sensors, Shape, underwater gliders
0364-9059
Lidtke, Artur
5570c46b-09b5-4345-9f5c-7a5ed2a29ffc
Turnock, Stephen
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Downes, Jonathan
ebc0f09b-9d33-4815-bedf-bc77df59c822
Lidtke, Artur, Turnock, Stephen and Downes, Jonathan (2022) Hydrodynamic design of underwater gliders using k-kL-ω Reynolds Averaged Navier-Stokes Transition Model IEEE Journal of Oceanic Engineering (doi:10.1109/JOE.2017.2733778).

Lidtke, Artur, Turnock, Stephen and Downes, Jonathan (2022) Hydrodynamic design of underwater gliders using k-kL-ω Reynolds Averaged Navier-Stokes Transition Model IEEE Journal of Oceanic Engineering (doi:10.1109/JOE.2017.2733778).

Record type: Article

Abstract

Hydrodynamic design of an underwater glider is an act of balancing the requirement for a streamlined, hydrodynamically effective shape and the consideration of the practical aspects of the intended operational envelope of the vehicle, such as its ability to deploy a wide range of sensors across the water column. Key challenges in arriving at a successful glider design are discussed and put them in the context of existing autonomous underwater vehicles (AUV) of this type. The design cycle of a new vehicle shape is then described. The discussed AUV will operate both as an buoyancy-propelled glider and a flight-style, propellerdriven submersible, utilising its large size to deliver substantial scientific payloads to remote locations to perform environmental monitoring, seabed survey, and exploration for sub-sea oil, gas and material deposits. Emphasis is put on using computational fluid dynamic (CFD) methods capable of predicting laminar-turbulent transition of the flow in order to estimate the performance of candidate designs and thus inform and guide the evolution of the vehicle. A range of considered shapes are therefore described and their hydrodynamic characteristics predicted using CFD are summarised. A final shape for the new glider is then proposed. This is then subject to an in-depth flow-field analysis which points out how natural laminar flow may be used as a means of drag reduction without compromising the practical aspects of the design, such as its ability to carry sufficient payload. Finally, the obtained data are used to project the expected glide paths, as well as give preliminary estimates of its range. These show the benefits of minimising the vehicle drag, as well as highlight the possible trade offs between maximising speed and endurance of
the AUV.

Text 2017 Lidtke A K - Hydrodynamic Design of Underwater Gliders Using k-kL-omega RANS Transition Model - Accepted Manuscript
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Text 2017 Lidtke A K - Hydrodynamic Design of Underwater Gliders Using k-kl-omega RANS Transition Model - Accepted Manuscript
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More information

Accepted/In Press date: 11 July 2017
e-pub ahead of print date: 22 August 2022
Keywords: Buoyancy, CFD, Drag, Engines, fluid dynamics, Hydrodynamics, Mathematical model, performance prediction, Sensors, Shape, underwater gliders

Identifiers

Local EPrints ID: 412548
URI: http://eprints.soton.ac.uk/id/eprint/412548
ISSN: 0364-9059
PURE UUID: b520ba1d-1b38-4226-a00a-e66bbee214aa
ORCID for Artur Lidtke: ORCID iD orcid.org/0000-0002-2687-3083
ORCID for Stephen Turnock: ORCID iD orcid.org/0000-0001-6288-0400
ORCID for Jonathan Downes: ORCID iD orcid.org/0000-0003-2027-4474

Catalogue record

Date deposited: 20 Jul 2017 16:30
Last modified: 10 Nov 2017 05:01

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