Numerical Simulation of Damping and Added Mass Coefficients for a Prototype Submersible in Deep Water

Estimation of hydrodynamic forces is the first step in the design of submersibles. The hydrodynamic forces are expressed in terms of hydrodynamic coefficients. In this paper, to calculate the damping coefficients a method based on calculation of variation of the Drag and Lift coefficients with angles of attack and drift is described. The method is used to calculate the damping hydrodynamics of the Suboff submarine. A new method is also described in order to calculate the linear added mass coefficients of the submarine in axial and lateral directions. The method is validated by comparing its results with the known results for the added mass coefficient of a sphere. The numerical results agree well with the available experimental results of the submarine.