摘要
The predictive capability of transport equation-based cavitation models including the Kubota cavitation model (Model-1) and interfacial dynamics cavitation model (Model-2), is evaluated for the attached turbulent cavitating flows. In this study, the test problem is the unsteady cloud cavitating flows around a Clark-Y hydrofoil. Based on the evaluations of existing models, we identified the differences between these two vaporization and condensation processes in the affected region, and provided a modified density based cavitation model (Model-3). The numerical results of the cavity shapes, velocity distributions and dynamics of the cavity oscillations were compared to existing experimental data. Compared with the other cavitation models, a significant improvement for the numerical results of unsteady cavitating flows has been obtained with the new model. Our study provides the information for further modeling development.
The predictive capability of transport equation-based cavitation models including the Kubota cavitation model （Model-1） and interfacial dynamics cavitation model （Model-2）, is evaluated for the attached turbulent cavitating flows. In this study, the test problem is the unsteady cloud cavitating flows around a Clark-Y hydrofoil. Based on the evaluations of existing models, we iden- tified the differences between these two vaporization and condensation processes in the affected region, and provided a modified density based cavitation model （Model-3）. The numerical results of the cavity shapes, velocity distributions and dynamics of the cavity oscillations were compared to existing experimental data. Compared with the other cavitation models, a significant im- provement for the numerical results of unsteady cavitating flows has been obtained with the new model. Our study provides the information for further modeling development.
基金
supported by the National Natural Science Foundation of China (50679001 and 50979004)
