The impact of 12 spoiler-tab configurations, of different heights and widths, on the tip vortex generated by an oscillating NACA 0015 wing was investigated experimentally. For an oscillating wing equipped with a spoiler, the peak tangential velocity and core and total circulation were greatly reduced compared to a tab, regardless of its width, while the core radius remained largely unaffected with its center displaced vertically above the baseline wing. The most noticeable impact of a spoiler with a reduced height was its potential in alleviating the blade-vortex interaction (BVI) strength. Meanwhile, the largest favorable impact on the critical vortex flow parameters was achieved via a 25%-span spoiler-tab combination with a height of 5 and 2.5% chord, respectively. A contrary effect on the BVI suppression, especially during pitch-up, was, however, observed. The impact on the BVI can be improved by reducing the height of the spoiler at the expense of unfavorable change in the vortex strength and displacement.
Impact of short-span strip on oscillating-wing tip vortex
Experiments in Fluids ; 43 , 4 ; 617-626
2007
10 Seiten, 7 Bilder, 1 Tabelle, 21 Quellen
Aufsatz (Zeitschrift)
Englisch
Oscillating-Wing Tip Vortex With Passive Short-Span Trailing-Edge Flaps
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