Abstract
For an unmanned marine vehicles, the calculations of its resistance under the water and hydrodynamic coefficients are necessary and important work. For the complexity of the fluid around autonomous underwater vehicles(AUV), the kinematic and dynamic model of underwater vehicles are highly nonlinear and coupled so that the hydrodynamic performance are hardly to be obtained. With the help of computational fluid dynamic (CFD), all the corresponding hydrodynamic coefficients can be obtained accurately, which are used to establish the mathematical model. In this paper, the hydrodynamic coefficients of an AUV are solved by CFD software FLUENT detailedly. The simulation work for the motion control systerm is given. The pool experiments are carried out to check the validity of this method and the mathematical model of AUV as well.
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