A typical wing-body junction region was presented.In order to modify the horseshoe vortex

the vortex generator was placed upstream of the wing on the flat plate.Numerical simulation was conducted to investigate the effects of the vortex generator's heights on the turbulent junction flow.The results show that any vortex generator can weak the horseshoe vortex.The modification is best with 2mm of the vortex generator's height.The vortex legs congregate round the wing with the increasing of the heights.The proposed method is a kind of passive control method.The modification of junction flows with vortex generator application presented is promising since it is very simple and applicable.