View Single Post
Old 01-24-2013, 02:24 PM   #406 (permalink)
Master EcoModder
freebeard's Avatar
Join Date: Aug 2012
Location: northwest of normal
Posts: 19,245
Thanks: 5,392
Thanked 6,350 Times in 5,092 Posts
As far as vortexes go, my reading is that the square edges is where they are created, so image 3 would be the worst for that.
Mine is that vortexes are caused by a pressure imbalance between the top and sides causing air to move up instead of back, so a square section wouldn't shed vortexes. The middle shape is based on a superellipse—half-way between a circle and a square. I see it as reasonable stand-in for the vehicle actual cross section with some height/width adjustment.

Definately want some answers on the contradictions of top taper, side taper and the 22*rule.
Here's two answers

  Reply With Quote