The effect of vortex induced vibrating cylinders on airfoil aerodynamics
The effect of vortex induced vibrating cylinders on airfoil aerodynamics
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DOI：
10.1016/j.apm.2022.12.001
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发表时间：
2022-12
影响因子：
5
通讯作者：
Dongyang Chen;Rui Xu;Zhida Yuan;G. Pan;P. Marzocca
中科院分区：
文献类型：
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作者：
Dongyang Chen;Rui Xu;Zhida Yuan;G. Pan;P. Marzocca
采用流固动力学方法建立了单、双缸翼型的二维流固耦合动力学模型。通过与现有实验数据进行比较，验证了翼型和涡激振动仿真模型的准确性。采用耦合仿真研究了均匀来流作用下两个圆柱体的涡激振动以及翼型前缘不同位置的两个圆柱体对其气动力的影响。涡度图和流线图提供了单圆柱和双圆柱放置在不同攻角时对翼型的影响的证据。还观察了气缸的振动响应。结果表明，在大迎角时，通过在翼型前缘附近放置小圆柱体可以有效地控制翼型的流动分离。小型摆动气缸可以比固定气缸更好地控制翼型周围的流动。事实上，当翼型处于失速状态时，单个振动气缸可以控制流动分离并提高翼型升阻比，比考虑无气缸或双气缸时更好。对于失速后迎角增大的情况，单摆动气缸控制翼型周围流动的能力逐渐减弱，而双摆动气缸控制翼型周围流动的能力逐渐增强。
Two-dimensional fluid-structure coupling dynamic models of single- and double-cylinder with airfoil are established using fluid-structures dynamics methods. The accuracy of the airfoil and vortex-induced vibration simulation models is verified by comparing them with available experimental data. Coupled simulations are used to study the vortex-induced vibration of two cylinders under uniform incoming flow, and the influence of two cylinders at different positions of the airfoil leading edge on their aerodynamic forces. Vorticity and streamline diagrams provide evidence of the effects of single cylinder and double cylinders on the airfoil when placed at different angles of attack. The vibration response of the cylinder is also observed. The results show that at high angles of attack the flow separation of the airfoil can be effectively controlled by positioning small cylinders in the proximity of the airfoil's leading edge. A small oscillating cylinder can contribute to control the flow around the airfoil, better than fixed cylinder. Indeed, when the airfoil is within stall condition, a single vibrating cylinder can control flow separation and improve airfoil lift-to-drag ratio, better than when no cylinder or double cylinders are considered. For increasing angle of attack post stall condition, the ability of a single oscillating cylinder to control the flow around airfoils decreases gradually, while the one of double cylinders increases.