Abstract Wind tunnel experiments were used to investigate the effects of geometry on the transverse galloping behavior of nominally rectangular cylinders at Reynolds numbers from 1,000 to 10,000. Static measurements of the lift and the drag forces were used to determine the variation of the normal force coefficient with angle-of-attack, in accordance with the typical quasi-steady description of galloping. Cylinders with unity chord-to-thickness ratio (side ratio) were found to vary from unstable, to neutrally stable, to stable as the corner radius was increased from sharp, to half-round, to fully-round, with this effect diminishing with decreasing Reynolds number. Cylinders with side ratios of 2 or 3 demonstrated either stability over the entire Reynolds number range, or a transition from unstable to stable with increasing Reynolds number, depending on corner radius. The results demonstrated that in general, increasing the corner radius had a stabilizing effect.

中文翻译：

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几何形状对雷诺数范围 1,000–10,000 内矩形圆柱体的飞驰不稳定性的影响

摘要 风洞实验用于研究几何形状对雷诺数为 1,000 到 10,000 时名义矩形圆柱体横向飞驰行为的影响。升力和阻力的静态测量用于确定法向力系数随迎角的变化，符合典型的飞驰准稳态描述。发现具有统一弦厚比（边长比）的圆柱体从不稳定到中性稳定，再到稳定，因为圆角半径从锐角增加到半圆，再到全圆，这种影响随着雷诺数递减。侧比为 2 或 3 的气缸在整个雷诺数范围内表现出稳定性，或者随着雷诺数的增加从不稳定过渡到稳定，取决于拐角半径。结果表明，总的来说，增加拐角半径具有稳定作用。