Active control of self-induced roll oscillations of a wing using synthetic jet

Tianxiang Hu, Zhijin Wang, Ismet Gursul, Chris Bowen

Research output: Contribution to journalArticlepeer-review

14 Citations (SciVal)


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.
Original languageEnglish
Pages (from-to)201-214
Number of pages14
JournalInternational Journal of Flow Control
Issue number3-4
Publication statusPublished - Sept 2013


Dive into the research topics of 'Active control of self-induced roll oscillations of a wing using synthetic jet'. Together they form a unique fingerprint.

Cite this