Design And Optimization Of A Bulk Carrier Propulsion Device

Due to the global energy shortage and the environmental pollution. “Low carbon economy has become the hot destination of each country. On the basis of green ship in ship design and shipbuilding has been received the attention of the ship industry. In the design of the propulsion system, the improvement of propeller design can improve the efficiency of propulsion, reduce the fuel consumption of the propulsion system. The fund is saved and the product development cycle is shortened by CFD simulation.The propeller of a double-hull bulk carrier is chosen to study its open water performance,the following several aspects were studied in this dissertation:1 、 Open water performance of the propeller is simulated and analyzed by Fluent.First,the three-dimensional model of the propeller is carried out with the software UG,two kinds of grid model are used to analyze the performance of the propeller such as mixed partitioned mesh and unstructured mesh.By comparison with experiment data,the numerical results with mixed partitioned mesh method are well evaluated and average relative error is 5.7%,less than unstructured mesh method. So mixed partitioned mesh method is the superior plan.2、In this dissertation,the open water test of the propeller was carried out in the towing tank of wuxi 702 institute.The advance is constant and the rotational speed is changed and the open water performance data of the propeller was got.3 、 In this dissertation,systematic CFD simulations are carried out to study the influences of part of the geometric parameters and verify the result were met the requirement or not.The resistance characteristic of the ship is calculated with the ship machine propeller matching software HydroComp.The thrust is verified to meet the requirement,the thrust increase by 5.2%,the torque increase by 5.5% and the propeller efficiency increase by 1.3%.