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Effects of hull length on the hydrodynamic loads on a slender underwater vehicle during manoeuvresAbstract -Experiments were performed with the bare hull of a full-scale, slender, body-of-revolution underwater vehicle of five different lengths, using an internal three-component balance and a planar motion mechanism (PMM). The experiments included resistance, static yaw, dynamic sway and yaw, and, circular arc runs. Results from the resistance, static yaw and sway runs are presented.

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During cruising and maneuvering, the hydrodynamic loads induced on underwater vehicles can be readily modeled and calculated using numerical (virtual) tanks. However, the results obtained from any numerical simulation should not be completely trusted unless satisfactory validation and quality assurance of the numerical results are obtained. To achieve a high degree of confidence in a virtual tank, the numerical results must be compared with experimental data (either laboratory or field data).The main goal of this paper is to present direct comparisons between the numerical results obtained from explicit finite element simulations and the results of physical model tests. The numerical simulations were conducted using a combination of two packages of commercial software, the ANSYS and LS-DYNA finite element codes. The physical experiments were conducted using the Marine Dynamic Test Facility (MDTF),

In September of 1998, a collaborative effort between the Institute for Marine Dynamics (IMD) of the National Research Council of Canada and the Ocean Engineering Research Centre of Memorial University of Newfoundland began to design a streamlined AUV to serve as a testbed for /MD and graduate level research. This A UV, the C-SCOUT, is expected to serve as a test-bed to assist in the development of future control and propulsion systems, the testing of vehicle components, and as a general research and development tool for years to come. Future versions of C-SCOUT can be configured for a wide variety of missions including search and survey, under ice operations, iceberg profiling, oceanographic sampling, and mine detection and countermeasures.