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Estimation of the hydrodynamic coefficients of the complex-shaped autonomous underwater vehicle TUNA-SAND

Estimation of the hydrodynamic coefficients of the complex-shaped autonomous underwater vehicle TUNA-SAND
Estimation of the hydrodynamic coefficients of the complex-shaped autonomous underwater vehicle TUNA-SAND
Hydrodynamic coefficients strongly affect the dynamic performance of autonomous underwater vehicles (AUVs). Thus it is important to have the true values of the coefficients in order to simulate the AUV’s dynamic performance accurately. Although these coefficients can be predicted by many methods, most are only applicable for AUVs with streamlined shapes. Computational fluid dynamics (CFD) can be applied to estimate the hydrodynamic coefficients of AUVs with complex shapes. In this study, CFD was applied to estimate the hydrodynamic coefficients of the AUV TUNA-SAND (which stands for terrain-based underwater navigable AUV for seafloor and natural resources development), which has a complex block-like structure. First, the validity of the CFD simulation was verified by comparison with experimental results. Second, the relationships between hydrodynamic loads and motions for all six degrees of freedom were analyzed using the simulated results. Third, the importance of each hydrodynamic coefficient was investigated based on these relationships. There are 16 key damping coefficients that relate to viscosity and 12 key inertial coefficients that relate to the potential flow around TUNA-SAND. Finally, the values of all the key coefficients were obtained and verified by comparing the solutions of the simulated dynamics with the experimental results.
0948-4280
373-386
Tang, Sulin
7c093651-e407-434d-958c-050c26f3d22f
Ura, Tamaki
b8fea5ba-e731-40fd-8544-1db1ca9f356b
Nakatani, Takeshi
dc8f7f62-f81e-487b-8a6d-e1a2fb83a810
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Jiang, Tao
9e527cf6-43a9-46a5-845e-bc66c9ce15ac
Tang, Sulin
7c093651-e407-434d-958c-050c26f3d22f
Ura, Tamaki
b8fea5ba-e731-40fd-8544-1db1ca9f356b
Nakatani, Takeshi
dc8f7f62-f81e-487b-8a6d-e1a2fb83a810
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Jiang, Tao
9e527cf6-43a9-46a5-845e-bc66c9ce15ac

Tang, Sulin, Ura, Tamaki, Nakatani, Takeshi, Thornton, Blair and Jiang, Tao (2009) Estimation of the hydrodynamic coefficients of the complex-shaped autonomous underwater vehicle TUNA-SAND. Journal of Marine Science and Technology, 14 (3), 373-386. (doi:10.1007/s00773-009-0055-4).

Record type: Article

Abstract

Hydrodynamic coefficients strongly affect the dynamic performance of autonomous underwater vehicles (AUVs). Thus it is important to have the true values of the coefficients in order to simulate the AUV’s dynamic performance accurately. Although these coefficients can be predicted by many methods, most are only applicable for AUVs with streamlined shapes. Computational fluid dynamics (CFD) can be applied to estimate the hydrodynamic coefficients of AUVs with complex shapes. In this study, CFD was applied to estimate the hydrodynamic coefficients of the AUV TUNA-SAND (which stands for terrain-based underwater navigable AUV for seafloor and natural resources development), which has a complex block-like structure. First, the validity of the CFD simulation was verified by comparison with experimental results. Second, the relationships between hydrodynamic loads and motions for all six degrees of freedom were analyzed using the simulated results. Third, the importance of each hydrodynamic coefficient was investigated based on these relationships. There are 16 key damping coefficients that relate to viscosity and 12 key inertial coefficients that relate to the potential flow around TUNA-SAND. Finally, the values of all the key coefficients were obtained and verified by comparing the solutions of the simulated dynamics with the experimental results.

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More information

e-pub ahead of print date: 29 April 2009
Published date: September 2009
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 400022
URI: http://eprints.soton.ac.uk/id/eprint/400022
ISSN: 0948-4280
PURE UUID: 30224926-e9ad-4170-aa20-92ba3fb41771

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Date deposited: 12 Sep 2016 15:54
Last modified: 09 Jan 2022 07:21

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Contributors

Author: Sulin Tang
Author: Tamaki Ura
Author: Takeshi Nakatani
Author: Blair Thornton
Author: Tao Jiang

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