Lift enhancement of a rectangular wing undergoing a small amplitude plunging motion
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, U. S. A.: American Institute of Aeronautics and Astronautics.
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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
|Item Type||Book Sections|
|Creators||Calderon, D. E., Wang, Z. and Gursul, I.|
|Departments||Faculty of Engineering & Design > Mechanical Engineering|
|Research Centres||Aerospace Engineering Research Centre|
|Additional Information||Paper no. 2010-0386|
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