Tip leakage vortex cavitation of pump-jet propulsor
In the numerical calculation of tip vortex dynamics of pump-jet propulsor,the rotor tip vortex has extremely high requirements on grid quality near the rotor tip.In order to accurately calculate the tip leakage vortex cavitation,this pa-per took a tip leakage vortex observation experiment.Numerical calculation was set based on the experiment.The shortcom-ings of the commonly used multi-channel periodic structure grid in the calculation of the tip leakage cavitation are analyzed.On the basis of the analysis,a method of local grid reconstruction in the rotor domain was proposed.The numerical results were compared with the experimental results.It indicated that the method proposed in this paper can not only meet the ultra-high requirements of local grid quality of the tip leakage vortex cavitation,but also accurately predict tip leakage vortex cavitation with less cell counts.
万方数据
维普
