n smikle wrote:That would be very dangerous if it did happen. you need 1000's of Netwons to lift the front up. That would be a real shock to the driver, not to mention an increase in drag as the wing starts to work.
I did a basic, rough and dirty CFD test. Air speed 100mph. A car with a slot in the step and a car without.
The air flow behave very similarly, almost identical. Maybe I need a supercomputer? lol.
Anyway. There was air backed up inside the cockpit in both models. I didn't have a driver in there just open cockpit. I will model a driver and try again later but for now this is what I saw:
The car with the slot in the step was had a few Newtons (880N Vs 890N) less of drag at 100mph. You can call it the same because with the driver it might be even closer.I do not know how accurate these values are of course, just a quick dirty model.
The slot modeled was actually very generous at about 3/4 inch tall. Flow went through it at a decent speed about 80mph then slows down.
The slot was still too restrictive to change the general quality of the air spilling over the sides (I just looked on the velocity component in the sideways direction).
It did not change the quality of the air going over the top edge of the step either. It still had that pressure "inflection" over the edge.
I Really don't know.. other than driver cooling- which Newey didn't need such a step, The air flow quality change was very miniscule.
I don't know what Newey is using it for, but my deduction leads me to believe it is for other reasons. Like maybe an F-duct.
I hope someone who is an aero expert investigates it.
Excellent rough and dirty effort with the CFD. I do think the Caterham/Lotus type nose will give the best drag numbers with that kind of analysis. Did you include the RB8's side fences on your CFD analysis? I think that would improve the spillage greatly, and increase the flow into the intake.