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Old 05-29-2020, 06:18 AM   #1 (permalink)
JulianEdgar
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Flow over upper surfaces and lift

I forgot I had this shot, taken where I was looking down a little on the tufted Jaguar.

Notice there's no separation on the upper surfaces at all from nose to tail, except for a tiny amount at the base of the rear windscreen.



Measured pressures:



Once you get a feel for it, it's one area in car aero where, if there's attached flow, you can be pretty confident where there will be low and high pressures - and also make a good guess at their relative values (on the upper surfaces, anyway).

Incidentally, look at how low the pressures are above and below the car, compared to the wake pressure.

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