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Lift enhancement of a rectangular wing undergoing a small amplitude plunging motion


Reference:

Calderon, D. E., Wang, Z. and Gursul, I., 2010. Lift enhancement of a rectangular wing undergoing a small amplitude plunging motion. In: 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, VA.: American Institute of Aeronautics and Astronautics.

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Abstract

We present an experimental study on a plunging rectangular wing with semi aspect ratio of 2, at low Reynolds numbers of 1×104- 3×104. Time-averaged force measurements have been presented as a function of non-diniensional frequency, alongside particle image velocimetry (PIV) measurements at the midspan plane. We study the effect of oscillations at low amplitudes and various angles of attack. The presence of multiple peaks in lift have been identified for this three-dimensional wing, thought to be related to the natural shedding frequency of the stationary wing. Wing/vortex and vortex/vortex interactions have been identified which may also contribute to the selection of optimal frequencies. Lift enhancement is observed to become more notable with increasing amplitude, coupled with a slight shift in the peak frequencies, to lower Strouhal numbers, with increasing angle of attack. Despite the highly three-dimensional nature of the flow, lift enhancements up to 180% are possible

Details

Item Type Book Sections
CreatorsCalderon, D. E., Wang, Z. and Gursul, I.
DepartmentsFaculty of Engineering & Design > Mechanical Engineering
Research CentresAerospace Engineering Research Centre
StatusPublished
ID Code27656
Additional InformationPaper no. 2010-0386. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. 4-7 January 2010. Orlando, FL, United States.

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