Quote:
Originally Posted by Piotrsko
Ok you are not shielding from the boundary layer, you are minimizing the adverse effects. Ideally you want it driven/measured in an airconditioned building?
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A thought experiment to illustrate the race course context would be:
* The raceway is in the 'lee' of a hill ( Phoenix Int'l Raceway ).
* The hill behaves like a the cabin of a pickup truck.
* The race course is embedded within the stagnation bubble 'behind' the cabin.
* There's a Prandtl line of discontinuity created in which the race course resides, as long as the wind doesn't shift.
* Ambient conditions observed on the race course are 'dead air.'
* A small, sub-critical Reynolds number race car could get away with a 'laminar' body under this condition, as long as its velocity was held below the sub-critical Rn transition velocity. We're talking frontal areas of 3.8-sq-ft.
* No 'full-size' car, at typical travel velocities could ever get away with that.
