| This thesis studies the key technologies of the overall design of 1200 open container ships,and summarizes the key elements and design requirements of the overall design of open container ships.The power system design scheme of coastal open container ships suitable for the new LNG-lithium battery hybrid shaftless rim-driven thruster power system is proposed,and complete the preliminary layout of relevant cabins and equipment of the power system.The linetype of the new power open container ship is improved,and its resistance performance is calculated and analyzed by CFD method to verify the superiority of the improved ship type resistance.The hydrodynamic calculation of shaftless rim-driven thruster(RDT)is carried out to analyze its open water characteristics.The design ship-RDT is coupled and CFD is used for self-propelled calculation to study its fast performance at the design speed under full load condition.It provides certain guidance and reference for the research and development of this ship type.The main research work and conclusions of this thesis are as follows:(1)The type selection of the power propulsion system of the new open container ship is studied.Through the analysis of different power propulsion forms,thruster types and their application characteristics in open container ships,the applicable power propulsion forms and thruster types of the new open container ships are defined;Carry out preliminary design of the LNG-lithium battery hybrid shaftless rim-driven thruster system,and clarify the composition and operation principle of each part of the LNG-lithium battery hybrid system;Carry out preliminary layout design for the relevant cabins and equipment of the LNG-lithium battery hybrid shaftless rim-driven thruster system of the open container ship,and draw the preliminary layout of the open container ship(approach to Appendix I).(2)The line design of the LNG-lithium battery hybrid shaftless rim-driven thruster open container ship is carried out.Based on the analysis of the linear characteristics of the mother ship,the relationship between the main dimension parameters and the resistance,the shape design direction of the new open container is clarified.The ship design software is used to design and improve the hull line of the design ship,and the corresponding 3D model is built according to the hull line before and after the improvement.The CFD method is used to calculate the resistance performance of the hull before and after the improvement,and the calculation results are analyzed to verify the accuracy of the software before and after the improvement and the superiority of the resistance performance of the new ship type,laying a foundation for the following numerical simulation study of the ship-propeller selfnavigation experiment.(3)CFD method is used to calculate the open water performance of shaftless rim-driven thruster.This paper discusses the method of establishing blade,stator and rotor models of shaftless rim-driven thruster,and clarifies the selection of technical elements such as calculation domain,mesh division and boundary conditions.The thrust and torque of shaftless rim-driven thruster are calculated,and the influence of various structures of shaftless rim-driven thruster on thrust coefficient and torque coefficient is analyzed.The water tank experiment was carried out and compared with the simulation value to verify the accuracy of the open water performance of the shaftless flange propeller calculated by CFD.The open water performance of shaftless rim-driven thruster is compared with that of conventional ducted propeller,which provides some guidance for the selection of shaftless rim-driven thruster in the future.It also prepares for the following research on numerical simulation of ship-propeller self-navigation experiment.(4)The numerical simulation of ship-propeller self-navigation experiment is carried out to study its rapidity.STAR CCM+software is used to simulate the coupling self-navigation test of KCS ship and KP505 propeller,and the calculation results are compared with the test values to verify the accuracy of self-propelled prediction.Then,the self-navigation calculation of the design ship-shaftless rim-driven thruster coupling is carried out to complete the rapid prediction of the design ship at the design speed under the full load condition.It provides some guidance for the future self-navigation experiment and numerical simulation of the ship type under complex working conditions. |
PDF Full Text Request