Quote:
Originally Posted by aerohead
Your slot may reduce drag,compared to a sharp,90-degree leading edges,but a leading edge of the same 'outside radius will have lower drag.
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Ok
Finally down to the nitty-gritty...
1. We're talking automotive/truck aerodynamics...
2. Say a flat-front box shape exposed to an air stream, like on high wide box on local delivery truck..
3. Modest leading edge radii on top and sides, say 4"R
4. Lets also say smooth surfaces and transitions to planes of box.
5. No cab-roof mounted air deflector.
Case 1: the 4"R leading edge radii mentioned above.
Case 2: 8" half-pipes mitered/mounted to sharp-edged box's leading edges.
Separation typically does not occur? Even in crosswinds? Even without crosswinds?