A cavitation model for cavtating flow simulations

The numerical simulation closures for cavitating flows are addressed. Several cavitation models are evaluated with the experimental results. Based on evaluation and the analysis of the unsteady characteristics of cavitating flows, a density modify based cavitation model for cavitating flow computations is proposed, which concerns multi-phase and time scale information of the cavitating flows. Series calculations of cavitating flows with different cavitation models around an axisymmetric cylindrical object and a Clark-Y hydrofoil are conducted. The cloud cavities, pressure distributions have been obtained and compared with experimental ones. Here, differences are observed in the simulated results, due to the differences in compressibility characteristics handled by each model. And compared with the other closure models, a significant improvement for the numerical results of cavitating flows have been obtained with the present proposed model.