Interaction of Vortex Breakdown with an Oscillating Fin
Interaction of Vortex Breakdown with an Oscillating Fin
复制标题
DOI：
10.2514/2.1324
复制
发表时间：
2000-01
期刊：
影响因子：
2.5
通讯作者：
I. Gursul;W. Xie
中科院分区：
文献类型：
--
作者：
I. Gursul;W. Xie
为了了解气动弹性方向对涡破裂和振荡涡抖振的影响，通过流场显示和速度测量研究了涡破裂与振荡涡的相互作用。当频率低于某一截止频率时，涡破裂位置的响应呈准周期性，破裂位置的变化幅度随频率的增加而减小。对于高于截止频率的频率，涡破裂不响应的电子振荡。这些观测结果表明，击穿位置对振荡电子的动态响应类似于低通滤波器的响应。结果表明，在不同的位置上，e_n的振幅响应是相似的，这一结果可用于e_n的设计，以防止反馈效应和涡破裂与e_n结构的耦合。本文根据涡旋流的波传播特性对实验观测结果作了理论解释。
The interaction of vortex breakdown with an oscillating e n was investigated by e ow visualization and velocity measurements to understand the effects of aeroelastic dee ections on e n buffeting. For frequencies lower than a cutoff frequency, the response of vortex breakdown location is quasi periodic, and the amplitude of the variations of breakdown location decreases with increasing frequency. For frequencies higher than the cutoff frequency, vortex breakdown does not respond to the e n oscillations. These observations suggest that the dynamic response of breakdown location to an oscillating e n is similar to that of a low-pass e lter. For different locations of the e n with respect to the vortex, similar amplitude responses were found. This result can be used in the design of e ns to prevent a feedback effect and coupling between the vortex breakdown and e n structure. A theoretical explanation of the experimental observations based on the wave propagation characteristics of the vortex e ows is presented.