Abstract: According to projection theory and curvedsurface offsets,a 3D geometry model of propeller was built.Based on computational fluid dynamics（CFD） method,the subdomains hybrid meshes method,the dynamic meshes method and the moving reference frame（MRF） method were adopted to simulate the hydrodynamic performance of propeller in openwater by using the ReynoldsAveraged NavierStokes（RANS） equation and RNG turbulence models.Thruust and torque of the propeller in open water were obtained and compared with experimental results.The results show the proposed method can achieve the numerical prediction of hydrodynamic performance for propeller in open water.