Any pics would be appreciated
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Those are just the maximum dimensions.
So they want whatever vortex is generated by those series of vanes to interact with the cutout in the floor?aerofoilf1 wrote: ↑26 Mar 2021, 21:43Some other angles
https://pbs.twimg.com/media/ExbgRaVWYAA ... name=large
https://pbs.twimg.com/media/ExbgSCSWgAw ... ame=medium
The edge vortex of the floor. The low pressure underneath causes higher pressure air from above to roll around the edge- which increases the pressure under the car and costs downforce.
jjn9128 wrote: ↑26 Mar 2021, 22:57The edge vortex of the floor. The low pressure underneath causes higher pressure air from above to roll around the edge- which increases the pressure under the car and costs downforce.
How I see this working is that because front half of the floor has a lower pressure than the mid-rear, especially talking under the scroll at the outboard edge which is being worked hard thanks to the bagerboards and venetian blind flaps, the edge vortex being formed is quite strong - and obviously unwanted. This break in the edge surface forces the vortex to shed, it is then pushed outboard with the aid of the outwash and vortex from the VGs on the top surface, which is rotating in the opposite direction. Then there will be a second, weaker, vortex forming at the edge of the floor downstream which does not pull so much higher pressure air under the car. It costs surface area but if the mean pressure under the car as a result is lower it's a benefit.
Wonderful analysis!
I think this is why they're struggling, I don't have the CFD to prove it, but I think they're increasing the pressure on the face of the rear tire. This increases tire squirt, because you're aiming air directly at the face of the tire where the pressure is highest increasing it further. When the edge vortex from the floor smashes into the tire it dissipates and increases the pressure on the face. Since air will always flow towards the path of least resistance that high pressure air will seek the lowest pressure gradient, which is under the car.jjn9128 wrote: ↑26 Mar 2021, 22:57The edge vortex of the floor. The low pressure underneath causes higher pressure air from above to roll around the edge- which increases the pressure under the car and costs downforce.
How I see this working is that because front half of the floor has a lower pressure than the mid-rear, especially talking under the scroll at the outboard edge which is being worked hard thanks to the bagerboards and venetian blind flaps, the edge vortex being formed is quite strong - and obviously unwanted. This break in the edge surface forces the vortex to shed, it is then pushed outboard with the aid of the outwash and vortex from the VGs on the top surface, which is rotating in the opposite direction. Then there will be a second, weaker, vortex forming at the edge of the floor downstream which does not pull so much higher pressure air under the car. It costs surface area but if the mean pressure under the car as a result is lower it's a benefit.
