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Published 2010 | public
Book Section - Chapter

Lock-On to a High-Lift State with Oscillatory Forcing in a Three-Dimensional Wake Flow


Flow control is applied to a three-dimensional post-stall flow around a rectangular low-aspect-ratio wing. Steady actuation is used to examine effective flow control setups that modify the vortex dynamics in the wake and achieve increase in lift. For one of the setups, oscillatory forcing is then used to examine the influence of actuation frequency. It is found that sinusoidal actuation requires less momentum to the flow field to achieve lift increase compared to steady momentum injection. There are two observed ranges of forcing frequency at which the flow locks onto period-one and period-two high-lift states. Discussions of the ongoing work on stabilizing separated flow about these periodic high-lift states are offered.

Additional Information

© 2010 Springer-Verlag Berlin Heidelberg. This work was supported by the US Air Force Office of Scientific Research (FA9550-05-1-0369 and FA9550-07-1-0127) with some of the computations made possible by the US Department of Defense High Performance Computing Modernization Program. The authors thank Professor Philip Holmes and Professor David Williams for enlightening discussions.

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August 21, 2023
January 14, 2024