Numerical simulation of hydrodynamic performance of PC456 propeller based on Fine/Marine
[Objective]The purpose of this paper is to study the hydrodynamic and cavitation flow charac-teristics of the self-designed cavitation propeller model PC 456 in oblique flow.[Methods]The numerical solution was solved using the ISIS-CFD solver integrated in the commercial software Fine/Marine and com-bined with turbulence models and Schnerr-Sauer(S-S)cavitation models.Sliding surface mesh technology is then used for the numerical simulation.First,the open water performance simulation results of DTMB 4119 propeller under non cavitation uniform flow conditions are compared with experimental data,and the inde-pendence of four mesh schemes is studied to verify the accuracy of the numerical model established in this pa-per.The open water performance of the PC456 propeller is then predicted,and the S-S cavitation model is ap-plied to simulate its uniform inflow and cavitation under different oblique flow conditions.[Results]The results indicate that oblique flow can interfere with the hydrodynamic performance of propeller model PC456.This is manifested in the fluctuation of the single blade thrust coefficient and torque coefficient caused by ob-lique flow at different positions,as well as the influence of oblique flow on propeller cavitation,which in turn disturbs the performance to varying degrees.[Conclusions]The larger the skew angle of the propeller,the greater the fluctuation of the thrust coefficient and torque coefficient of the blade at different positions.However,propeller cavitation causes varying degrees of disturbance in both thrust and torque coefficients in the two oblique flow,and the degree of disturbance is not directly proportional to the cavitation area.
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