Comparison of Ducted and Non-Ducted Ship Propellers with Constraints Consideration Using Genetic Algorithm

In recent years, in spite of progressing in the ship propulsion system, many problems are required to work in order to gain highest performance. Optimization of propeller system, as the most important and applicable in this type of systems is of special importance. In many vessels, due to their certain conditions design, ducted propeller is used. Genetic algorithm is a powerful method for finding all parameters in a design with multiple objectives. Therefore, considering various aspects of design, we can use this algorithm for designing propellers. In this paper, GA method is applied for two purpose; hydrodynamic efficiency and vibration consideration, for optimized design of ducted propellers by applying Ka-series with nozzle NO.19A. The results from the ducted propeller design are also compared with the results obtained from the B-series propeller design.