Numerical Calculations of Maneuvering Damping and Added Mass Coefficients up to the Third Order for an Autonomous Underwater Vehicle

Abstract

In this paper hydrodynamic coefficients of AUV including maneuvering damping and added mass coefficients are investigated up to the third order using the FVM. The PMM module is implemented in two situations to calculate the moment and force for yaw and sway motions. To estimate the hydrodynamic coefficients, the sixth-order polynomial equations are interpolated for forces and moments in terms of velocity and acceleration (linear and rotational). Using the obtained equations and the determination of each coefficient, the maneuvering damping and added mass coefficients are extracted up to the third order. The results show that the added mass coefficient of the yaw moment is 1.94, which shows an error of less than 0.5% compared to the experimental results. On the other hand, the ratio of the length to the diameter is investigated. The approach presented in this study will increase the accuracy and reduce the calculation time.