Calculation Submarine Hydrodynamic Coefficient by Hybrid Method

Increase in the accuracy of hydrodynamic coefficient calculation cause to increase in the prediction of vessel maneuvering ability. Different methods of determining hydrodynamic coefficients will be effective in determining the accuracy of coefficients, especially in numerical simulation. In this paper, we do planar motion mechanism (PMM) test, oblique towing test, and rotating arm test simulations to compare the accuracy of their results with experimental data. The accuracy of the simulation results of K-ε Realizable and K-ω SST turbulence model has been investigated in the simulation of the rotating arm test. Also, a method to reduce the dimensions of the domain and the run-time in the simulation of the motion of pure-Sway and pure-heave has been presented, discussed, and evaluated. The results show that by hybridizing these methods we can calculate the sway and heave damping coefficients with an error under 8.5% and their added mass coefficients with an error under 20%, the yaw and pitch damping coefficient with an error under 9.5%, and the yaw and pitch added-mass coefficient with an error under 15%.