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Active control of self-induced roll oscillations of a wing using synthetic jet
| Content Provider | Semantic Scholar |
|---|---|
| Author | Hu, Tianxiang Wang, Zhijin Gursul, Ismet Bowen, Christopher R. |
| Copyright Year | 2013 |
| Abstract | Active control of self-excited roll oscillations of a rectangular flat plate wing with an aspect ratio of two was studied experimentally in a wind tunnel, using synthetic jet excitation near the leading edge. It was found that, by activating the synthetic jet excitation at an optimum frequency of St = 1, large amplitude roll oscillations could be attenuated and the onset of the oscillation can be delayed by up to Δαmax = 3.5° for extremely small values of momentum coefficient. High frame-rate Particle Image Velocimetry (PIV) measurements revealed a strong resonance between the synthetic jet excitation and shear layer instabilities. The resonance energizes the shear layer separated from the leading edge and results in a local flow field that is more typical of lower wing incidence, thus effectively suppressing roll oscillations. |
| Starting Page | 201 |
| Ending Page | 214 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.1260/1756-8250.5.3-4.201 |
| Alternate Webpage(s) | http://triggered.stanford.clockss.org/ServeContent?url=http://multi-science.atypon.com/doi/pdf/10.1260/1756-8250.5.3-4.201 |
| Alternate Webpage(s) | https://doi.org/10.1260/1756-8250.5.3-4.201 |
| Volume Number | 5 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |