A Study On The Effect Of Propeller Area Ratio On Self-propulsion Of KCS Model

Shipping industry undertakes more than 90% of global trade and transportation,which is affected by many factors such as international politics,economy and trade,and changes rapidly.In recent years,the international economic situation is depressed.As a barometer of global economic change,the overall situation of the shipping industry has also been downward.At the same time,in order to protect the environment and deal with global warming and environmental pollution,Shipowners and shipping companies choose to reduce the service speed of container ship and improve the efficiency of propulsion to improve economic benefits.How to improve the propeller propulsion efficiency has become the research focus in the design and construction of container ships.With the development of computer technology,scholars at home and abroad are no longer confined to theoretical research and model test methods.In recent years,with the increasing demand of industry and military,numerical simulation of ship hydrodynamics by CFD commercial software has become a necessary skill for fluid workers.As one of the important characteristic parameters of propeller,the change of propeller area ratio will affect the propulsion efficiency.In order to study how the change of propeller area ratio will affect the propulsion efficiency,this paper takes the international standard model KCS and KP505 propeller as the research object.Through learning the previous research results,this paper carries out the numerical simulation calculation of model scale for resistance test of ship,open water test of propeller and self-propulsion test,and predicts the self-propeller factor of ship model.The numerical simulation can accurately solve the viscous flow field around the ship and propeller and capture the flow state of the flow field.Simulation results of the paper can meet the accuracy requirement of the calculation results.Changing the chord length distribution of the blades so we can change the propeller area ratio of KP505 propeller,and establish the new propeller models.The numerical simulation calculations of the open water test and the self-propelling test of the new propeller models are carried out,and we can obtain the trend of the propulsion efficiency changing with the propeller area ratio.With the increase of the propeller area ratio,the efficiency of propulsion increases.