The numerical study of the cavitation-structure interaction around 3D flexible hydrofoil

9th International Symposium on Cavitation

Hu, Shi-Liang^1 ; Chen, Ying^1 ; Lu, Chuan-Jingx^1

Department of Engineering Mechanics, Shanghai Jiao Tong University, No. 800 Dong chuan Road, Shanghai, China^1

关键词: Cavitating flow;    Cavitation number;    Cavitation structure;    Frequency spectra;    Hydrodynamic loads;    Water tunnel;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/656/1/012126/pdf
DOI  :  10.1088/1742-6596/656/1/012126

来源: IOP

【 摘 要 】

The closely coupled approach combined the Finite Volume Method (FVM) solver and the Finite Element Method (FEM) solver is applied to simulation the cavitation-structure interaction of a 3D cantilevered flexible hydrofoil in water tunnel. In the cavitating flow, the elastic hydrofoil would deform or vibrate in bending and twisting mode. And the motion of the foil would affect the characteristics of the cavity and the hydrodynamic load on the foil in turn. With smaller cavitation numbers (σv=2.15), the frequency spectrum of the lift on the foil would contain two frequencies which are associated to the cavity shedding and the first bend frequency of the hydrofoil. With larger cavitation number (σv=2.55), the frequency of the lift is completely dominated by the natural frequency of the foil.