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 and ω - 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.

本文的目的是通过实验和数值方法研究柔性水翼周围云空化流的动态行为。应用紧密耦合的流固耦合 (FSI) 模型并用实验数据进行验证。Q -准则和ω- 应用标准来说明涡流结构和空腔之间的相互作用。可以看出，柔性会导致机头向上的扭曲变形，从而导致附着腔长度增加而导致脱落频率降低。由于具有柔性，柔性水翼的载荷系数波动比刚性水翼大。而且，柔性水翼的再入射流传播速度大于刚性水翼。在强振动和间隙流的共同影响下，观察到棚云腔沿着柔性水翼跨度是均匀的。