Numerical evaluation of cavitation void ratio significance on hydrofoil dynamic response

9th International Symposium on Cavitation

Liu, Xin^1 ; Wang, Zhengwei^1 ; Escaler, Xavier^2 ; Zhou, Lingjiu^3

Department of Thermal Engineering, Tsinghua University, Beijing

100084, China^1

Center for Industrial Diagnostics, Universitat Politècnica de Catalunya, Barcelona

08028, Spain^2

College of Water Resources and Civil Engineering, China Agricultural University, Beijing

100083, China^3

关键词: Added mass effects;    Cavitation conditions;    Cavitation tunnels;    Cavity density;    Frequency reduction;    Mode shapes;    Sound speed;    Two phase mixtures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012159/pdf
DOI  :  10.1088/1742-6596/656/1/012159

来源: IOP

【 摘 要 】

The added mass effects on a NACA0009 hydrofoil under cavitation conditions determined in a cavitation tunnel have been numerically simulated using finite element method (FEM). Based on the validated model, the effects of averaged properties of the cavity considered as a two-phase mixture have been evaluated. The results indicate that the void ratio of the cavity plays an increasing role on the frequency reduction ratio and on the mode shape as the mode number increases. Moreover, the sound speed shows a more important role than the average cavity density.