Investigation on the dynamic behavior of cloud cavitation around a flexible hydrofoil  

作　　者：Yun-qing Liu Wei Zhao Zhi Pan Zhi-pu Guo Rui Yuan Qin Wu 

机构地区：[1]School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China [2]Wuhan Second Ship Design and Research Institute,Wuhan,430205,China

出　　处：《Journal of Hydrodynamics》2023年第4期712-723,共12页水动力学研究与进展B辑（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.52279081,51839001);supported by the Natural Science Foundation of Beijing Municipality(Grant No.3232033);the Fundamental Research Funds for the Central Universities(Grant No.2023CX01004);the BIT Research and Innovation Promoting Project(Grant No.2022YCXY014).

摘　　要：The objective of this paper is to investigate the dynamic behavior of cloud cavitating flow around a flexible hydrofoil with experimental and numerical methods.The tightly coupled fluid-structure interaction(FSI)modeling is applied and validated with the experimental data.The Q-criterion andω-criterion are applied to illustrate the interaction between the vortex structures and cavities.The flexibility is seen to result in nose-up twist deformation,causing a reduction of the shedding frequency from an increase in the attached cavity length.Due to the flexibility,the fluctuation of load coefficients of the flexible hydrofoil is larger than that of the rigid hydrofoil.Moreover,the re-entrant jet propagation speed of the flexible hydrofoil is greater than that of the rigid hydrofoil.The shed cloud cavity is observed to be uniform along the flexible hydrofoil span under the combined influence of the strong vibration and the gap flow.

关 键 词：Cloud cavitation fluid-structure interaction(FSI) vortex structures flexible hydrofoil 

分 类 号：O35[理学—流体力学]