In these renderings, you can see flow lines blended with near flow field pressure to visualize how the air around the car is reacting to the changes the aero kit make.
Here is what the flow pattern over pressure distribution looks like in plane view. This is only part of the flow lines, the ones that interact with the sides of the car.
This is a rendering of pressure distribution in the near and far flow fields around the car.
This is pressure vs downforce distribution over the rear of the car, the wing and rear diffuser.
This is the pressure distribution over the rear diffuser. CFD has some limitations so it is important to correct the math model with numbers derived from physical testing on the actual car. Verus did windtunnel verification on the rear wing and used tools like coast down testing, speed vs ride height with multiple laser ride height indicators and flow visualization tools like flow paint and tuft testing to tweak the math model to get the CFD output to match the actual car. The result is perhaps the most well engineered aero kit on the market for any car!
From the data Verus was able to derive drag to speed with the wing at various angles of attack.
6 comments
Although I’ll never be able to afford this outrageous Carmen, I’ve been interested in the Caman since it’s inception – it just made sense even if Porsche “put the lid on its development to preserve their 911 market. I always believed in the Cayman concept like a newly converted religious sinner! I will never even see much less drive this highly developed iteration of the Cayman. But, I greet it as the very best Porsche ever built and potentially if not presently The Best Sports Car in existence bar none.”The best was expected” and it wasn’t Porsche that delivered!
Well, since the new GT3 finally has double wishbone suspension, I doubt that the Cayman is the best Porsche ever built. But, it is obvious that they have been holding out with MacPherson strut suspension for as long as possible. Finally, the ultimate street Porsche is here…if you can afford it.
And, you can get it with a manual transmission!
https://m.youtube.com/watch?v=wJLmc_M-0ng
Do these renderings mean that there’s not much to gain by raising the rear wing higher? The color of the air hitting the rear wing is the same as the color of the clean air in front of the car.
Yes there were no indicated gains by putting the wing higher. Lower wings usually work better on fastback cars as the flow stays attached to the roofline and deck better.
I remember in the video on the initial build that the plan was to use the hydraulic HLS system to drop the rear of the car in the straights to reduce the rear wing angle and low the drag like a DRS system. Theoretically could you information from a shock travel sensor to continually adjust the height of the front and rear suspension to hold the aero in an optimum height as the car pitches and rolls through braking and cornering?
We are not that smart. Correction the owner of the car doesn’t have the money to pay for the development of that.