Numerical study of the influence of the Reynolds-number on the lift created by a leading edge vortex | Zendy

Xiaoqin Zhang | Zendy; Jörg Schlüter | Zendy

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Numerical study of the influence of the Reynolds-number on the lift created by a leading edge vortex

Author(s) -

Xiaoqin Zhang,

Jörg Schlüter

Publication year - 2012

Publication title -

physics of fluids

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.188

H-Index - 180

eISSN - 1089-7666

pISSN - 1070-6631

DOI - 10.1063/1.4718322

Subject(s) - reynolds number , physics , lift (data mining) , vortex lift , mechanics , vortex , drag , wingtip vortices , lift coefficient , lift to drag ratio , leading edge , classical mechanics , horseshoe vortex , turbulence , vortex ring , computer science , data mining

We present a numerical study on the influence of the Reynolds-number on the lift enhancing effect of a leading edge vortex. Our approach is based on a combination of large-eddy simulations and the immersed boundary technique. We determine the influence of the leading edge vortex on the unsteady lift by simulating a fast pitch-up motion of the plate and studying the lift evolution after holding the flat plate fixed at an angle of attack. Our results suggest that an optimal Reynolds-number exists that maximizes the lift of the leading edge vortex, but that the lift-to-drag ratio is largely independent of the Reynolds-number above a Reynolds-number of Rec > 2000.

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