Effect of Vortex Generators on Exhaust Plume Trajectory
I carried out this CFD test to help me understand better the effect of vortex generators (VGs) on the trajectory of the exhaust plume. This first test was carried out without any VGs:
The second test was carried out with one VG. You can see how the exhaust plume was deflected towards the tire.
The third test was carried out with 2 VGs. The deflection this time was minor, but was made apparent because it was pushed towards the tire and the 'dirty' air behind it which messes up the flow of the exhaust plume.