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It’s tough to see, but you can just make out how the air flows under the front of the car and then over the top of a lower aero pan thingy (super technical term). P.S. Sorry for the crappy picture, I had to take it from behind the glass.
The air going beneath the front of the car gets directed by the lower pan around the cockpit and out the sides of the vehicle. An Audi engineer may have coined the term of developing the aero to move “through the car”, or I may have had too much second hand inhalation, but that’s what the air does on these LeMans prototype cars.
The main body profile is low with the wheel pods and cockpit protruding. From this angle, you can imagine how the air flows between the wheel pods and cockpit towards the rear wing.
Audi had two variations (that I remember) on the rear wing endplate scheme. Another version had a set of endplates offset wider from the set seen here if I remember correctly. Regardless, they served to act as the wing mounts too along with a little swan neck mount in the middle. From this angle, you can see the little kick-up on the trailing surface of the rear bodywork.
There’s a lot of stuff going on behind the rear tire in an effort to control and direct the airflow. My guess is the goal is to essentially straighten out the turbulent flow coming off the rear tire in order to have a smoother merge with the rest of the airflow going around the car. Our resident reader aero guys, feel free to add in comments and correct any of my mistakes!
I managed to get a decent picture of the tunnels underneath the Audi.
