The Hydrodynamics Influence Of Ship Wake On The Podded Propeller

Podded propulsor is a new type of ship propulsive device developed in recent years, which offers improved hydrodynamic performance, saved space, increased payload capability and improved battle effectiveness. It could make full use of the advantages of electric power propulsion. Therefore, it has an extensive application prospect in market and great application value in military. However, further research on podded propulsors has just initial starting. Now, the theoretical research and model test work on the fluid hydrodynamic performance of podded propulsors are still in the primary phase at home, so they should be developed in time to provide a prediction method for engineering practice and to establish the base for the improvement of hydrodynamic performance.Under the background of rapid development of CFD and swift improvement of computer capacity, this advanced technology is utilized in the research on the performance of podded propulsors. Based on the theory of CFD, this thesis uses FLUENT to simulate numerically the three dimensional flow field of ship model nearby. Standard k -εformula turbulence model is utilized in computation, and SIMPLEC algorithm is used to solve the problem of coupling speed and pressure.After the flow field of ship model nearby simulated numerically, the result should be taken into consideration in the computation of steady hydrodynamic performance of podded propulsors, then we will obtain some beneficial conclusion. Accordingly, a more accurate method for the hydrodynamic performance of podded propulsors through CFD technology is proved, and the conclusion could provide some reference for the further research on hydrodynamic performance of podded propulsors.