Quote:
Originally Posted by j-c-c
Makes sense, however I suspect any kinetic energy in the back window area, "shadow", is likely more turbulent if of any velocity. But depending on exact placement, it might even be opposite to the cars direction, and not sure I want to constantly explain why my NACA inlet brake ducts are backwards. 
So I'll ponder that further.  |
Yeah,the backlight area is all turbulence.It's nothing but entropy,with no way to harvest any kinetic energy of the swirling eddies.There may be an area where central downwash crashes onto the top of the trunklid,which could 'push' air into a break cooling duct.Tufting would tell the tale.Volkswagen,Porsche,and other rear-engine cars have taken advantage of this effect to harvest engine cooling air.You'd be looking for a 'star' pattern in the tufts,radiating away from an apparent 'center.'