Resistance Study Of Deep-V Ship

Following the development of automotive industry, vehicle handling and stability gain more attention and dynamic control has been widely studied now.Rapidity performance is an important performance index of a ship, which directly decides ship’s practicability and economic benefits, meanwhile resistance study is the main content of rapidity performance study.Deep-V hull form in all transverse section is the most notable feature of deep-Vship. It has good see-keeping performance,course stability and can sail in the waves at a high speed compared with other ship form other ship forms, thus is widely used in the design of military ship, cruise ship, public service ship and high-speed ferry.Based on the deep-V ship to study the resistance performance. Deep-Vship is used for resistance study in this paper.Deep-Vship has a comparatively high design speed, its moving state can change obviously effected by hydrodynamic force. Therefore the moving state should be taken into account in resistance performance study. In this paper, VOF(Volume Of Fluid)method is adopted to solve free surface, and κ- ε turbulence model is adopted to solve RANS(Reynolds Averaged Navier-Stokes) Equations in Fluent software. In addition, 6DOF(Six Degrees of Freedom)model is adopted to simulate ship’s moving state, the ship is considered as rigid body to solve 6DOF state equations and diffusion fairing method is used to update dynamic mesh. Structured grid is applied to disperse in the computational domain whose high grid quality contributes to improve computation efficiency. The method is verified to be feasible by comparing computation’s resistance and trim angle results with experiment’s and analyzing the error value.In the process of deep-V ship design, deadrise angle is an important parameter. Different deadrise angle can have different hydrodynamic performance, wave suppression plate and adjust the initial center of gravity are common methods to reduce resistance. This paper studies deadrise angle,stern wave suppression plate installation angle and longitudinal center of gravity’s influences on resistance based on model experiments. The study comprises the following steps:1).Under the design displacement condition, different deadrise angle’s resistance performances are studied;2).Under the design displacement condition, different wave suppression plate’s resistance performances at each deadrise angle are studied, and the optimal wave suppression plate installation angle is picked out.3).Light,design and full displacement condition’s resistance performances are studied with wave suppression plate.4).Longitudinal center of gravity(initial trim angle) is changed to study the resistance performance.The content in this paper can be referential to simulate ship’s moving state using structured grid method in Fluent software; at the same time, the data of a series of deep-V ship in this paper can guide the design and operation of the ship; deadrise angle,stern wave suppression plate and center of gravity’s effects on deep-V ship is universal to some extent which can be a guidance for design of new ship form.