高雷诺数下交叉圆柱涡激振动的数值分析

基于能量捕获应用场景，利用数值仿真的方法研究了高雷诺数下交叉圆柱的涡激振动(Vortex Induced Vibration, VIV)现象。首先建立了三维VIV数值模型，通过与已有文献试验数据对比验证了该数值模型的准确性。进而在该模型的基础上，对交叉圆柱的VIV进行了仿真研究，并与普通圆柱做了对比分析。研究发现，受竖圆柱的影响，交叉圆柱在中低流速的涡强度有所减小，使低流速下的柱体振幅减小，启动流速变大；在中流速范围，涡脱落位置的改变，使得振幅增加；在高流速范围涡强度和涡脱落位置变化并不明显，振幅也与普通圆柱相近。

Numerical Analysis of Vortex-Induced Vibration of a Crossed Circular Cylinder at High Reynolds Numbers

Based on the energy capture application scenario, this paper studies the VIV phenomenon of crossed cylinders at high Reynolds numbers by numerical simulation. A three-dimensional VIV numerical model was established, and the accuracy of the numerical model was verified by comparing with the experimental data in the existing paper. On the basis of the model, the VIV of the crossed cylinder is simulated and compared with that of the ordinary cylinder. It is found that due to the influence of the vertical cylinder, the vortex intensity of the crossed cylinder at low and medium flow rates decreases, which reduces the amplitude of the cylinder at low flow rates and increases the starting flow rate. In the middle flow rate range, the amplitude increases due to the change of the vortex shedding position. In the high velocity range, the vortex intensity and vortex shedding position do not change significantly, and the amplitude is also similar to that of the ordinary cylinder.