A Study of Interaction of a Pair of Longitudinal Vortices with a Horseshoe Vortex around a Wing. 1st Report. Potential for Passive Controlling by a Pair of Vortex Generators.

Abstract

This paper presents a potential for a passive control of a horseshoe vortex at the root of the wing. NACA 0024 wing is established on a turbulent boundary layer. A pair of vortex generators of half delta wing is installed upstream of the wing. The controlled horseshoe vortex is tested qualitatively by flow visualization technique. Also, the potential for controlling is quantitatively investigated by wall static pressure and total pressure. The horseshoe vortex is remarkably controlled in Common Flow Up Configuration (CFUC) of vortex generators. The distortion of the total pressure contours is diminished by 49% and the vortex is located closer to the wing. In case of Common Flow Down Configuration (CFDC), the mass flow averaged pressure loss is decreased by 29% compared with the case without a pair of vortex generators.