Hydrofoil Design And Hydrodynamic Characteristics Of Gliding-hydrofoil Craft

In recent years,all countries in the world attach great importance to the research of high speed craft.The development of high speed craft is to improve the speed and improve the navigation performance.The hydrofoil craft is the product of the combination of the planing craft and the hydrofoil,and the navigation condition can also be regarded as the combination of the hydrofoil craft and the planing boat.The sliding surface of the planing boat is combined with the hydrofoil of the hydrofoil boat,the hull can be rapidly lifted,the drag force can be effectively reduced,the sliding state can be faster,and the utility model has better stability.With the increasing speed of the hydrofoil craft,the pressure of the fluid field around the hull will change dramatically,so that the pressure around the hull with vertical direction is large enough to support the weight of some or all of the ship hull weight,reduce the contact area with water,in order to reduce the resistance of high speed.The research and analysis of this paper are as follows:(1)According to the relevant literature,different airfoils were selected,and Fluent software was used to carry out the numerical simulation of the hydrofoil.Optimal water airfoil shape.(2)15.8 meters of the sliding boat was selected as the parent ship,and the ship model was scaled to scale 1:10.Towing test in the towing tank of the school.The trailer,resistance amplifier,az316 analyzer,DH3840 type strain amplifier simulation entity after install hydrofoil ship in the hydrodynamic characteristics of underwater navigation,and install hydrofoil with different initial installation angle,different water depth,and the installation position of the hydrofoil effect on ship hydrodynamic characteristics.(3)According to the relevant literature,reference to the type of ship owners,the use of Maxsurf software to design a three-dimensional boat type,and then imported into the CATIA software.In addition the hydrofoil hydrofoil hull,and change the initial installation angle of attack,immersion,front and rear position,establish complete various models.(4)The experimental results of FINE/Marine software to calculate accurate,then the bow type hydrofoil respectively combined with the mother ship to change the initial angle of attack using the FINE/Marine software,the immersion depth and initial installation position for numerical simulation,The resistance coefficient,the ratio of lift to drag ratio,the resistance and the inclination angle are compared and analyzed under different initial angles of attack,relative depth of dip and installation position.In order to select the best resistance performance of the hydrofoil craft,the parameter combination of the optimum installation position of the bow shaped hydrofoil is determined.