Effects of Flexible Fin on Low-Frequency Oscillation in Poststall Flows
Effects of Flexible Fin on Low-Frequency Oscillation in Poststall Flows
复制标题
DOI：
10.2514/1.j050205
复制
发表时间：
2010-06-01
期刊：
影响因子：
2.5
通讯作者：
Pantula, S.
中科院分区：
文献类型：
--
作者：
Liu, Tianshu;Montefort, J.;Pantula, S.
本文讨论了附着在 NACA0012 翼型模型上表面的柔性矩形聚合物薄膜（翅片）对失速流中自然低频振荡的影响。柔性翅片被动地操纵流动结构，从而抑制低频振荡并减少阻力。速度场和翅片变形运动学的详细测量显示了柔性翅片对完全分离流区域中流动结构的发展的显着影响。探讨了低频振荡的产生和控制机制。
This paper discusses the effects of a thin flexible rectangular polymer film (fin) attached to the upper surface of a NACA0012 airfoil model on the natural low-frequency oscillation in poststall flows. The flexible fin passively manipulates flow structures, which leads to suppression of the low-frequency oscillation and reduction of drag. Detailed measurements of the velocity fields and kinematics of fin deformation show the significant effects of a flexible fin on the development of the flow structures in the fully-separated-flow region. The generating and controlling mechanisms of the low-frequency oscillation are explored.