Numerical Analysis Of Hydrodynamic Performance Of Hybrid CRP Propulsion

Both the soaring oil price and the increasingly stringent EEDI have put forward higher requirements for further boosting efficiency and reducing energy consumption,as the traditional space propulsion of single propeller has been very limited,how to deal with the EEDI requirement and reduce the energy consumption of ships in the range of acceptable cost is a problem that we must seriously consider and solve.As a new type of energy-saving propeller,Hybrid CRP propulsion System has been paid more and more attention in recent years.This kind of propeller takes into account the advantages of CRP propulsion system and electric pod propulsion system,and is considered to have broad application prospects.Therefore,it is very meaningful to study the hydrodynamic performance of hybrid CRP propeller.In this paper,38000DWT ship model and hybrid CRP propeller are used as the main research object.CFD commercial software Fluent and RANS model are used to establish the numerical method for the numerical simulation of hydrodynamic performance and propeller induced exciting force.Firstly,the numerical simulation of the performance of conventional CRP-4 and standard ship JBC resistance is carried out,and the results are compared with the experimental values to meet the engineering requirements.Then the steady-state hydrodynamic performance of the 38000DWT ship model and the hybrid CRP propeller was calculated,the characteristics of flow field detail and hydrodynamic performance of the ship and propeller were analyzed,and the rule of mutual influence between the front and after oars was discussed.It also simulates the changes of the hydrodynamic performance caused by the change of the significant parameters of the rear propeller of the hybrid CRP propeller under the condition of the ship and propeller,which provides the idea for the optimal design of the hybrid CRP car propeller;at last,the time-domain curve of propeller-induced exciting force is obtained by unsteady calculation on the basis of the steady calculation of the propeller.By FFT transform into frequency-domain curve,time domain and frequency domain characteristics of hybrid CRP propellers are studied.