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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Hull hydrodynamic optimization of autonomous underwater vehicles operating at snorkeling depth
Ocean Engineering, Volume 36, No. 1, Year 2009
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Description
Traditionally autonomous underwater vehicles (AUVs) have been built with a torpedo-like shape. This common shaping is hydrodynamically suboptimal for those AUVs required to operate at snorkeling condition near the free surface. In this case, the wave resistance associated to the wavy deformation of the sea surface induced by the motion of the platform is an important component of the drag. This work has investigated the optimum hull shape of an underwater vehicle moving near the free surface. Specifically a first-order Rankine panel method has been implemented to compute the wave resistance on a body of revolution moving close to the free surface. A simulated annealing algorithm was then employed to search those set of parameters defining the hull shape that minimize the wave resistance. The optimization was constrained to keep constant the total volume of the vehicle. The total drag of scaled models of the torpedo-like and resulting optimum shapes was measured in the naval tank of the University of Trieste. Measurements showed a smaller resistance of the optimized shape in the range of the considered Froude numbers. © 2008 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Alvarez, A.
Spain, Esporlas
Csic-uib - Instituto Mediterraneo de Estudios Avanzados Imedea
Italy, La Spezia
Nato Undersea Research Centre
Bertram, V.
South Africa, Stellenbosch
Stellenbosch University
Gualdesi, L.
Italy, La Spezia
Nato Undersea Research Centre
Statistics
Citations: 93
Authors: 3
Affiliations: 3
Identifiers
Doi:
10.1016/j.oceaneng.2008.08.006
ISSN:
00298018