Comprehensive Energy Saving Effect Analysis Of Hull/Propeller/Rudder Of Trailing Suction Hopper Dredger

As a main dredger,TSHD plays an important role in port dredging and island reef development.With the large-scale development of TSHD,its energy consumption has a huge growth.In order to meet the requirements of the development of green ships,the energy saving and emission reduction of TSHD has become one of the hotspots.Starting from the propulsion system and hull line of the trailing suction dredger,based on the CFD method,this paper analyzes the resistance and self-propulsion performances of the TSHD,and evaluates the energy-saving effect of the TSHD by analyzing the effect of propeller upgrading and rudder type optimization.In this paper,the hydrodynamic resistance of the TSHD "Hang Jun 4006" and its appendages is calculated by using CFD technology,and then the self-propulsion performance of the TSHD is analyzed under the conditions of navigation and dredging.The results are compared with the test data.In the calculation of the self-propulsion performance of the dredger,the influence of the drag force is considered.The results show that the propulsion performance of the new propeller is improved to some extent compared with the original one under the conditions of navigation and dredging.Then,the hull/propeller/rudder models of two TSHDs "Hang Jun 4006" and "Xin Hai Feng" are established,and the resistance performance and self-propulsion performance of two TSHDs under navigation and dredging conditions are analyzed and compared.The results show that the new ship type has better resistance performance than the original one.The results show that the "Xin Hai Feng" has lower energy consumption.Finally,the rudder of "Xin Hai Feng" is modeled with full parameters,and the propeller/rudder system is optimized through the optimization strategy,and the improved energy-saving rudder is obtained.Compared with the original rudder,the resistance and moment of the new energy-saving rudder are smaller.With the help of CFD results,the pressure on the rudder surface and the flow field around the rudder are analyzed,and the reasons for the performance improvement of the energy-saving rudder compared with the original rudder are discussed.