Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
AERODYNAMIC EFFECTS OF ASYMMETRICAL LEADING EDGE PROTUBERANCES ON A RECTANGULAR WING
Submission Author:
Juan Flores Mezarina , SP
Co-Authors:
Juan Flores Mezarina, Daniel Garcia-Ribeiro, Pedro David Bravo-Mosquera, Hernán Cerón-Muñoz
Presenter: Juan Flores Mezarina
doi://10.26678/ABCM.COBEM2019.COB2019-1141
Abstract
The phenomenon produced by symmetrical protuberances, or tubercles, on the leading edge of a wing, also known as Wavy Leading Edge, has been widely studied on the last decades. They delay the stall angle, improve the performance on stall and post stall regime and reduce the span-wise flow by counter-rotating vortices generation. Recent WLE studies carried in swept wings showed significant increment of lift and reduction of the wing tip vortex’ strength. Although swept wings turn protuberances asymmetrical along the wingspan, this asymmetry hasn’t been parameterized and is only dependent to the sweep angle. The aim of this study is to introduce an asymmetry parameter, independent of the sweep angle, and to study its effects for different asymmetry configurations on a rectangular wing. Through wind tunnel measures and visualization tests, it was found that asymmetrical protuberances may have a great effect over cross-flow and induced drag.
Keywords
asymmetrical leading-edge protuberances, asymmetrical WLE, cross-flow reduction
