yes. as https://news.ycombinator.com/item?id=50122639 put it already, active aerodynamics including wings and diffusers has been a thing in automotive design for decades. A skirted active fan is not practical on anything but a smooth road surface especially at speed.
The actual concept is to reduce the pressure under the car to create downforce along the underside of the car (often ducted and pass through a rear diffuser for more efficiency.
The purpose of this is cornering speed. Rubber wheels have limited grip to translate lateral forces and avoid skidding or understeer, so downforce is used to provide a momentary vertical load to keep the wheel pressed into the ground to avoid slip.
We can easily generate downforce to go around corners, but it comes at a cost of adding drag, so straightline high speed is reduced. and the car is less efficient.
underside aero does not incur nearly as much drag penalty so is attactive on F1 and other race cars.
The actual concept is to reduce the pressure under the car to create downforce along the underside of the car (often ducted and pass through a rear diffuser for more efficiency.
The purpose of this is cornering speed. Rubber wheels have limited grip to translate lateral forces and avoid skidding or understeer, so downforce is used to provide a momentary vertical load to keep the wheel pressed into the ground to avoid slip.
We can easily generate downforce to go around corners, but it comes at a cost of adding drag, so straightline high speed is reduced. and the car is less efficient.
underside aero does not incur nearly as much drag penalty so is attactive on F1 and other race cars.