Gliding Hydrodynamic Performance Prediction And Shape Optimization Of Disc Underwater Vehicle

Due to the increasingly developed marine science and technology today,in that the underwater vehicle and the underwater glider have the advantages of small model and the function of remoting control,the optimization of the configuration and the research of hydrodynamic performance have become the new research area of more and more scientists.As the previous underwater robot model chasing the needs of the capacity of the work,its hydrodynamic performance isn't high.In this paper,a kind of dish-shaped submersible device that has better hydrodynamic performance and sliding performance is designed,which provides a reference for the design of new underwater robot.In this paper,the method of computational fluid dynamics is used to compare the different longitudinal profiles of the main body.It is found that the NACA0020 can reach the needs of hydrodynamic performance and practical performance.In the comparison of the flat body and the rotary body,the performance of the flat body is better.Then the different shape of the front area of the vehicle is compared,and the shape of the circular front is taken as the main body model.Secondly,the horizontal wing of different geometrical parameters with different geometric parameters is compared and selected for this kind of body.By derivating the equilibrium equation of the longitudinal profile and the comparison of the influences of different body model for the parachute gliding economy,gliding stability and gliding performance,the optimal possessive model is established.After that,the mutual interference between the main body and the entrainment is studied,and it is proved that the addition of the body can improve the performance of the submersible.Finally,the position force and rotation force parameters of the disc-shaped submersible are calculated through the method of overset grid,and the performance superiority of the designed underwater vehile is proved by numerical simulation.The hydrodynamic coefficients that can be solved can be used for the control system of the submersible.