Simulation Of Self-Propulsion Performance Of Pod-Propulsion Cruise Ship And Its Propulsion Performance Optimization

As a propulsion with a wide range of applications and high use value in cruise ships,podded propulsion has many advantages over traditional shafting propulsion.The pod propulsion has strong maneuverability and excellent hydrodynamic performance,which can meet the requirements of safety,reliability and economy during the cruise.At the same time,the coupling between the pod propulsion and the cruise ship is one of the key factors affecting the propulsion performance of the cruise ship.Therefore,it is of great significance to carry out the research on the self-propulsion performance of the cruise ship.In this paper,a large luxury cruise ship is taken as the research object of this paper to explore the hydrodynamic performance of its podded propulsion.The horizontal and vertical installation angles between the two are optimized.Finally,the seakeeping of the cruise ship under normal sea conditions and extreme sea conditions is evaluated based on the cruise seakeeping criteria.The main contents are as follows:(1)Real-scale hydrodynamic performance simulation of the pod propulsion of the cruise ship.Based on Starccm+ fluid mechanics simulation software,the standard k-εturbulence model,MRF model,cutting volume mesh and prism layer mesher are used to set up the numerical model of the podded thruster,and the open water performance simulation is carried out to analyze the podded thruster.The characteristics of the flow field around the podded propulsion were studied based on the variation of the propeller thrust coefficient,torque coefficient and open water efficiency with the advance coefficient.(2)Predict the resistance performance of the cruise ship model at different speeds under still water conditions,and compare the simulation results with the actual shipmodel resistance conversion data to verify the simulation accuracy.The self-propulsion performance of the pod-propulsion cruise ship was simulated under still water conditions to explore its propulsion efficiency at a fixed self-propulsion point.Finally,according to the horizontal and vertical installation angles between the pod propulsion and the cruise ship model,the single-parameter variable optimization and combined optimization of the pod-propulsion cruise ship are carried out,and the pod-propulsion cruise ship model when the cruise ship reaches the maximum propulsion efficiency is established.(3)Carry out the self-propulsion simulation seakeeping simulation of the podpropulsion cruise ship under normal sea conditions and extreme sea conditions in the corresponding self-propelled points,analyze the seakeeping performance indicators of the cruise ship under the two sea conditions,and compare the results with the seakeeping performance of the cruise ship.Criteria for comparison.The results show that the cruise ship can meet the seakeeping criteria except for the swaying period under general sea conditions,while the cruise ship cannot meet the seakeeping criteria requirements of the cruise ship under extreme sea conditions.