Numerical 3D analysis of cloud cavitation shedding frequency on a circular leading edge hydrofoil with a barotropic cavitation model

9th International Symposium on Cavitation

Blume, M.^1 ; Skoda, R.^1

Department of Hydraulic Fluid Machinery, Ruhr-Universität Bochum, Universitätsstr. 150, Bochum

44801, Germany^1

关键词: Cavitation model;    Cavitation number;    Cloud cavitations;    Cloud structure;    Comparative simulation;    Grid sensitivity;    Low Mach numbers;    Shedding frequencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012146/pdf
DOI  :  10.1088/1742-6596/656/1/012146

来源: IOP

【 摘 要 】

A compressible density-based time-explicit low Mach number consistent viscous flow solver is utilised in combination with a barotropic cavitation model for the analysis of cloud cavitation on a circular leading edge (CLE) hydrofoil. For 5° angle of attack, cloud structure and shedding frequency for different cavitation numbers are compared to experimental data. A strong grid sensitivity is found in particular for high cavitation numbers. On a fine grid, a very good agreement with validation data is achieved even without explicit turbulence model. The neglect of viscous effects as well as a two-dimensional set-up lead to a less realistic prediction of cloud structures and frequencies. Comparative simulations with the Sauer-Schnerr cavitation model and modified pre-factors of the mass transfer terms underestimate the measured shedding frequency.