Abstract
Hydrodynamic models and coefficients are important parameters for predicting the maneuverability of a remotely operated vehicle (ROV). In this study, we present an experimental analysis of the hydrodynamic behavior of a new ROV with an asymmetric shape, which has a high capacity for holding more instruments onboard than other ROVs. We performed a series of towing tests where this ROV moved in a vertical plane. We provide the fitting formulae for forces and moments, as well as the corresponding hydrodynamic coefficients, which can be used to simulate the motions and to predict the maneuverability of the ROV. We also discuss the effects of the ROV’s asymmetric shape on its hydrodynamic coefficients.
Highlights
This paper will present an experimental study on the hydrodynamic behaviors of a new Remotely Operated Vehicles (ROVs) that has an asymmetrical shape but has a large capacity holding more instruments on board than other ROVs
Underwater vehicles can be applied to ocean resource exploration and exploitation, pipeline inspection and offshore structure maintenance, seafloor geography mapping, and so on
For an underwater vehicle moving in the deep water at a constant speed, without taking the surface water effect into consideration, the hydrodynamic forces and moments are caused by the fluid viscosity, depending on its geometry and its motion velocities
Summary
Underwater vehicles can be applied to ocean resource exploration and exploitation, pipeline inspection and offshore structure maintenance, seafloor geography mapping, and so on. Hydrodynamics of ROVs are important for controlling their motions and predicting their performances in sea At present, their hydrodynamic properties are mainly studied by carrying out experiments. The reference [18] discussed the hydrodynamic properties of a submersible with an aerofoil for forward and backward motions, and the work in [6] and [19] conducted towing tests for ROV models moving in forward and backward, starboard and portside, upward and downward directions In these papers and others in literature, the effects of asymmetrical ROV shape on its hydrodynamic properties are rarely studied as far as we know. This paper will mainly study the properties of forces and moments acting on the ROV in such situations For this purpose, a series of model tests in surge and heave directions with constant towing speeds have been carried out. The forces and moments acting on the test model are measured using a six-component force transducer
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