Title: High-Fidelity Fluid-Structure Interaction Simulations of Perforated Elastic Vortex Generators Show Chinese title

Title: 高保真流固耦合模拟穿孔弹性涡流发生器

Abstract: This study conducts a high-fidelity two-way coupled fluid-structure interaction simulations, focusing on a novel perforated elastic vortex generator that is wall-mounted in an open channel with an incoming flow. The response of a perforated elastic vortex generator is investigated across a wide range of dimensionless parameters including dimensionless rigidity, mass ratios, Reynolds numbers, and porosity levels. Additional simulations for non-perforated elastic vortex generator are conducted for comparison and validation against available data. The findings demonstrate that a perforated elastic vortex generator can exhibit static configurations, lodging configurations, and vortex-induced vibration modes, depending on the dimensionless parameters. These configurations are similar to those observed for non-perforated elastic vortex generators, though the response values differ due to changes in the mechanical properties of the elastic vortex generator and the fluid loads acting on it as a result of perforation. An analysis of the perforated elastic vortex generator's natural frequencies shows that vortex-induced vibrations are triggered by the lock-in phenomenon associated with the second natural frequency of the vortex generator. Additionally, local flow dynamics are also studied by investigating vortical structures and velocity fields. Show Chinese abstract

Abstract: 本研究进行了高保真双向耦合流固交互作用模拟，重点关注了一种新型的壁装式开槽弹性涡流发生器，该发生器安装在有来流的开放渠道中。 研究了不同无量纲参数范围内的开槽弹性涡流发生器的响应，包括无量纲刚度、质量比、雷诺数和孔隙率水平。 为了对比验证，还进行了非开槽弹性涡流发生器的额外模拟。 研究发现，开槽弹性涡流发生器可以表现出静态构型、嵌入构型和涡流诱导振动模式，这取决于无量纲参数。 这些构型与非开槽弹性涡流发生器所观察到的类似，但由于弹性涡流发生器的机械性能变化以及由于开槽引起的流体负载变化，响应值有所不同。 对开槽弹性涡流发生器自然频率的分析表明，涡流诱导振动是由与涡流发生器的第二自然频率相关的锁定现象触发的。 此外，还通过研究涡旋结构和速度场来研究局部流体动力学。