Wake Transitions and Fluid-Structure Interactions of Rotating Bluff Bodies

在许多应用中，钝体的流动振动会导致严重的损坏，例如近海海洋结构和系绳体。钝体的旋转会导致升力的巨大增加，这可能会促进这些振动，而附近的自由表面可能会稳定振动。该项目旨在发现支撑振动和自由表面的明显相反影响的机制，单独和共同，以及两种一般钝体（圆柱体和球体）尾迹中二维和三维不稳定性的激发。预期的结果是发现新的身体振动模式，尾迹转换和控制流固耦合的方法。

Flow-induced vibrations of bluff bodies can lead to severe damage in many applications, such as off-shore marine structures and tethered bodies. Rotation of bluff bodies can result in huge increases in lift forces, which may promote these vibrations, whereas a nearby free surface may stabilise the vibrations. This project aims to discover the mechanisms underpinning the apparently opposing effects of vibration and free surface, individually and jointly, and the excitation of two- and three-dimensional instabilities in the wakes of two generic bluff bodies: the cylinder and the sphere. The expected outcomes are the discovery of new modes of body vibration, wake transitions and means to control fluid-structure interactions.