Hydrodynamic study of autonomous navigation of a simple ship with straight-wing propeller

In this paper, the numerical method is used to study the hydrodynamics of the autonomous navigation of the straight-wing propulsion simple ship, and the autonomous navigation performance of the simple ship is quantitatively studied by changing the size and kinematic parameters of the straight-wing propulsion module. The viscous flow problem in the autonomous navigation of a simple ship is solved by means of the three-dimensional Navier Stokes equation, and the autonomous navigation process of the simple ship with straight-wing propulsion is simulated by a combination of user-defined functions, sliding mesh and moving mesh technology. Change the parameters such as blade length and rotation frequency to test the change law of the hydrodynamic performance of the simple ship. The research results show that with the increase of blade length and rotation frequency, the propulsion force and propulsion speed of the simple ship increase, but the propulsion efficiency is not. Interestingly, the longer the blade lengthened, the lower the propulsion efficiency of the simple ship. The three-dimensional flow field structure reveals the dynamic evolution process around the wingspan of the propulsion module, and verifies the variation law of the hydrodynamic performance of the simple ship.