| Being one of the most important aspects of the propeller performances, propellercavitation is always a popular problem within shipbuilding researcher. This paper explores thenumerical simulation methods for cavitating flows with propeller cavitation as goal, based onthe computational fluid dynamics open source software OpenFOAM.In order to evaluate the feasibility and accuracy of OpenFOAM in the ship propellerflows simulation, this paper carries out the application study in wet flows with OpenFOAMfirstly, and lay the foundation for further solving cavitating flows problem. The2DNACA0015wing,3D SUBOFF barehull and DTMB P4119propeller are chosen to study theviscous flow calculating methods in OpenFOAM, and the effects on the solution ofcomputation grid, turbulence models and numerical discrete format are investigated, theresults in this paper are compared with the model test results and the simulation results ofcommercial software FLUENT, and it shows that the wet flow simulation methods arefeasible and efficient.Then, the2D NACA0015wing and3D TWIST11foil are chosen to study the simulatingmethods of the cavitating flows, the unsteady behavior of sheet cavitation is discussed, theinfluences on cavitation shape of turbulence models and cavitation models are investigated aswell, and the numerical simulation method of cavitating flows based on OpenFOAM is set up,and the comparison results with experimental data show that this method can complete theprediction of cavitating flows well, that provides an efficient technological approach tocavitation study in the future.Lastly, the numerical solver for cavitating flows is built by extending theabove-mentioned cavitation simulation method, and used to simulate the INSEAN E779Apropeller cavitation in uniform flows, the results show good agreement with experimentalresults. The successful solutions of caviting flows in rotating reference frame lay foundationfor the in-depth propeller cavitation study in future. |
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