A Hydrodynamic Performance Analysis Of Skew Rudder

Recently, with the international energy source problem in serious lack, Energy-saving becomes a long-range strategic mission in the economy development. Ship is the one of the main transports, whose energy-saving technologies have been paid more attention. With low cost, easy installation and etc, Energy-saving appendages are widely applied. A new energy-saving appendage—skew rudder was studied in the thesis which can improve propel effect by skewing the profile of rudder to fit the velocity field after propeller. The main contents of the thesis are as follows:The basic theory of CFD method was introduced. The steady and unsteady performances of open propeller and propeller rudder interference were calculated by FLUENT. Comparing with test values, the method was confirmed. The velocity field of propeller and rudder system was studied at the same time; Surface panel method was introduced to solve propeller and propeller-rudder system problem. Open propeller performance and propeller rudder interference performance were calculated again by this method. The computed results agree fairly well with CFD results and the experimental data. The velocity field of open rudder and rudder after propeller were analyzed; According to the working principle of skew rudder and the velocity field after propeller, skew rudder model was designed. The CFD method and surface panel method were applied to predict the hydrodynamic performance of propeller and skew rudder system. Meanwhile, the cavitation performance of normal rudder and skew rudder were studied. Theoretical studies have shown that the energy-saving effect and cavitation performance of skew rudder are better than normal rudder.