Research on hydrodynamic and cavitation characteristics of a propeller KP458

DOI:	10.11809/bqzbgcxb2023.07.023
Keywords:	propeller KP458; spiral encryption; cavitation; Schnerr Sauer cavitation model
Abstract:	With a propeller KP458 as the research objects, this paper studies the characteristics of its cavitation flow field. Firstly, through division of the tip vortex area and mesh refinement, the open water performance of the propeller KP458 is numerically simulated under the condition of uniform flow without cavitation. Then, a numerical prediction model of the propeller flow field is established, and the uncertainty analysis of four sets of meshes is carried out. After that, the calculated results are compared with the experimental data, and the Schnerr Sauer cavitation model is applied to numerical simulation. Finally, by comparing the test results with the simulation results of a propeller VP1304 hydrodynamic and cavitation characteristics, errors of the thrust and the torque coefficients both in the non cavitation flow field and the cavitation flow field are lower than 8%, which verifies the feasibility of the numerical calculation model. The research shows that the numerical model used has a good accuracy, and the spiral mesh refinement can capture the tip vortex generated by the propeller. The propeller KP458 has obvious tip vortex cavitation when the advance coefficient is low. As the advance coefficient increases, the cavitation size diminishes and the tip vortex cavitation disappears. In addition, the tip vortex strength of the propeller decreases gradually and the tip vortex fusion occurs at an early stage.
Published:	2023-07-28
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