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 

作者机构：School of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China Wuhan Second Ship Design and Research InstituteWuhan430205China 

出 版 物：《Journal of Hydrodynamics》 (水动力学研究与进展B辑(英文版))

年 卷 期：2023年第35卷第4期

页      面：712-723页

核心收录：

学科分类：08[工学] 080103[工学-流体力学] 0801[工学-力学（可授工学、理学学位）] 

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). 

主　　题：Cloud cavitation fluid-structure interaction(FSI) vortex structures flexible hydrofoil 

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.