Marine Propeller Hydrodynamic And Fluid-structure Coupling Strength Analysis

As one part of the ship’s main propulsion system, propeller is closely related to the economy and safety of the ship.it’s design and performance calculation has been a very important topic in the area of fluid mechanics. When propeller working, the influence of the hydrodynamic load will cause the elastic deformation of propeller blade,the elastic deformation effect of blade can affect the performance of propeller.Unable to fully consider the impact in CFD numerical simulation, a close physics-based fluid-structure interaction method become a problem to be considered.This article first designed a propeller based on charts. Second a method of computational fluid dynamics (CFD) is used to discuss propeller hydrodynamic performance.Third, propeller blade deformation and equivalent stress is investigated, the content is classified as follows:(1)The propeller design software are used to design the area ratio of B4-55 and B4-85 screw respectively, research in the field of the ship propulsion system core is quick, accurate solution.(2)The most important point is to refine the mesh where necessary. Prismatic grids are used to improve the mesh quality,which is helpful to get an accurate result.(3) The propeller geometry is built using software. Then the flow field of propeller is simulated using CFD method, and its hydrodynamic performance is obtained. The open water curve is drawn. And the hydrodynamic characters such as velocity, vector and pressure contour are analyzed.(4)Under the Workbench, the steady state of fluid-solid coupling analysis was carried out on the propeller.Under changing the advance coefficients, design propeller blade deformation and equivalent stress distribution are solved. Analysis of blade deformation and the change rule of equivalent stress of different material. The result can provide reference for the engineering application and theory research.