Quote:
Originally Posted by aerohead
Technically,a trip strip is any device which acts like a turbulator to trip a laminar boundary layer into a forced transition to turbulent boundary layer,or energize a TBL over a 'fast' contour.
It can be sand glued on,a wire,a bright molding on a Landau roof,dimples,nubs,ribs,micro-vanes,vortex-generators.
The sharp edge on the Prius is a fix to a design problem discovered in the wind tunnel.The original body created bistable flow,buffeting,and noise generation.
The hard edge fixes the separation line to maintain a constant drag coefficient,rather than one which 'hunts.'
Since they extend the elongation of attached flow and pressure recovery,they contribute to higher base pressure and lower pressure drag.All good.
Don't expect any remarkable savings.
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If I am reading this right, a trip strip can be the vortex generators that I have seen some fellow EMers put on their rear diffuser? I need to research laminar and turbulent boundaries, and a trip strip's simulated effect.
I would prefer a constant drag coefficient, rather than one that varies with every second. I have seen hard edges on several other cars, including a Volt. I am definitely going to work it into my build!
Every little bit will help me towards my ultimate goals!
Speaking of goals... Aerohead, do you think it is possible to get my car down to sub-0.15 Cd territory?