Estimation for hydrodynamic coefficient of an autonomous underwater vehicle by using dynamic mesh

Abstract

The hydrodynamic coefficient of the device strongly affects the working ability as well as the accuracy and stability of the automatic control algorithms of an autonomous underwater vehicle (AUV). Expensive experimental methods are not even possible in practice. The determination of these coefficients by empirical formulas will lead to large deviations due to the difference in the geometrical structure of the real device with the reference model. In this paper, we use numerical methods to determine these parameters. Complex movements of the AUV will be simulated by ANSYS software on the basis of dynamic mesh method. The obtained numerical results will be used to approximate the hydrodynamic coefficients for the AUV based on the optimization algorithms. Keywords: Hydrodynamic coefficient, dynamic mesh, UDF, CFD