This document discusses how increasing the angle of attack on an airfoil can improve aerodynamic downforce through a technique called Vortaflow. Standard airfoils produce less downforce at higher angles of attack due to separation of air, but Vortaflow reattaches the flow to increase downforce even at high angles. Tests on a Porsche showed a 5% increase in cornering speed with Vortaflow by generating more downforce at high speeds through corners.

1. Flow reattachment –
improved aerodynamic downforce

2. Normal angled wing
α≈0
CL ≈ y

3. Increased angle of attack
α≈x
CL ≈ 2 y

4. Separated airfoil
α≈2x
CL ≈ 0,5 y

5. Increased CL with Vortaflow
α≈2x
CL ≈ 3 y

6. α ≈ 0 CL ≈ y
α ≈ x CL ≈ 2 y
α ≈ 2 x CL ≈ 0,5 y
α≈2x
CL ≈ 3 y

7. Current technology
With Vortaflow
Reynolds number ≈ 2 · 106

8. Current technology
With Vortaflow
Reynolds number ≈ 2 · 106

9. Tests on a Porsche 996 GT3 RS
Result: 5% increase in
cornering speed

10. Design progress:
Equations
Experiments
Experience