Axial flow impeller cavitation characteristic calculation method based on delay type separation vortex simulation

The invention discloses an axial flow impeller cavitation characteristic calculation method based on delay type separation vortex simulation. The method comprises the steps of creating a physical model of an axial flow impeller device; carrying out mesh generation on the physical model of the axial flow impeller, dividing boundary layer meshes on the surface of the flow passage component, and carrying out mesh independence analysis; importing a grid file of the physical model into finite element software, and establishing a numerical model of the axial flow impeller; setting the precision of numerical calculation of the numerical model of the axial flow impeller; and carrying out unsteady cavitation numerical calculation on the axial flow impeller by adopting a physical model and a numerical model to obtain a cavitation characteristic curve and cavitation bubble distribution of the axial flow impeller. Quantitative calculation of cavitation characteristics of the axial flow impeller isachieved. Cavitation phe