Large-eddy simulations are conducted for a rotating golf ball and a rotating smooth sphere at a constant rotational speed at the subcritical, critical and supercritical Reynolds numbers. A negative lift force is generated in the critical regime for both models, whereas positive lift forces are generated in the subcritical and supercritical regimes. Detailed analysis on the flow separations on different sides of the models reveals the mechanism of the negative Magnus effect. Further investigation of the unsteady aerodynamics reveals the effect of rotating motion on the development of lateral forces and wake flow structures. It is found that the rotating motion helps to stabilize the resultant lateral forces for both models especially in the supercritical regime.

中文翻译：

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流过旋转高尔夫球的数值研究及其与旋转光滑球体的比较

在亚临界、临界和超临界雷诺数下，对旋转的高尔夫球和以恒定转速旋转的光滑球体进行大涡模拟。两种模型在临界状态下都会产生负升力，而在亚临界和超临界状态下会产生正升力。对模型不同侧流分离的详细分析揭示了负马格努斯效应的机制。对非定常空气动力学的进一步研究揭示了旋转运动对侧向力和尾流结构发展的影响。发现旋转运动有助于稳定两种模型的合成侧向力，尤其是在超临界状态下。