当前位置: X-MOL 学术Flow Turbulence Combust. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Robustness of the Leading Edge Vortex on Rotating Wings to Unsteady Perturbations
Flow, Turbulence and Combustion ( IF 2.4 ) Pub Date : 2022-03-10 , DOI: 10.1007/s10494-022-00322-0
Thierry Jardin

The vast majority of research works on low aspect ratio rotating wings report that, at high angle of attack, the leading edge vortex that forms on the upper surface of the wing is stable. This ‘trick’ is used by insects and auto-rotating seeds, for example, to achieve the desirable amount of lift. Yet, a few experimental studies suggest that leading edge vortices might be unstable under similar, low Rossby number, conditions. While it is unclear what causes vortex shedding in these studies, the present communication explores the sensitivity of leading edge vortex attachment to perturbations of the rotating speed and demonstrates that shedding can be triggered even for very small perturbations, corresponding to wing tip displacements lower than 1% of the wing chord.



中文翻译:

旋转机翼前缘涡对非定常扰动的鲁棒性

绝大多数关于低展弦比旋转机翼的研究表明,在大迎角下,在机翼上表面形成的前缘涡流是稳定的。例如,昆虫和自动旋转种子使用这种“技巧”来实现理想的升力。然而,一些实验研究表明,在类似的低罗斯比数条件下,前缘涡旋可能是不稳定的。虽然在这些研究中尚不清楚是什么导致涡流脱落,但本通讯探讨了前缘涡流附着对旋转速度扰动的敏感性,并证明即使非常小的扰动也可以触发脱落,对应于翼尖位移低于 1翼弦的百分比。

更新日期:2022-03-10
down
wechat
bug