Video: tuft testing front wheel skirts (Geo Metro) - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

NeilBlanchard · 10-06-2008, 05:17 AM

Hello,

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SpaceClaim | Paperless Parts
Paperless Parts

MetroMPG · 10-08-2008, 12:23 AM

Quote:

Originally Posted by Hasbro

While this smooths out the side more is it possible more turbulence is created underneath due to air not escaping from the rear of the well?

I don't think it would be a problem. You suggest that some significant volume of air is entering the well from somewhere and needs an escape. I don't think that's the case.

MetroMPG · 10-08-2008, 12:31 AM

Better late than never...

http://www.youtube.com/watch?v=Lo3EEHDoUgc

orange4boy · 10-08-2008, 01:16 AM

Wow. That's pretty darn conclusive. It would be tuft to beat that mod for turbulence reduction.

Thanks for that. Very professional looking. My wheels are turning to figure out a set for my van.

Nice.

cfg83 · 10-08-2008, 03:24 AM

MetroMPG -

Great Job! It will be neat to see your execution of the solution.

CarloSW2

Peakster · 10-08-2008, 04:13 AM

Awesome video MetroMPG! Dramatic difference I say. Keep up the great work

Daox · 10-08-2008, 07:22 AM

Very nice. I was surprised to see the improvement even above the wheel well. That is quite the difference.

Daox · 10-08-2008, 08:10 AM

Quote:

Originally Posted by MetroMPG

Regarding speed: tuft testing doesn't require high speeds. It's just flow visualization. Speed matters more when trying to quantify some aero mod, where 100 km/h may reveal something you can't detect @ 60 km/h.

Yes, but doesn't flow seperation happen earlier/easier (you know what I mean) at higher speeds?

lunarhighway · 10-08-2008, 09:18 AM

perhaps it would be interesting to use the same setup to test vortex generators behind an open front wheel well.... front wheel skirts are not really an option for everyone,

but perhaps some vortex geneators just aft of the wheel could improve the situation over stock.
some people claim they should be placed in front of a wheelwell so that might be tested as well.

the full wheelwell cover will likely be superior, but it would be interesing to see where vortex generators are positioned betwee these two extremes

MetroMPG · 10-08-2008, 10:20 AM

Quote:

Originally Posted by orange4boy

Wow. That's pretty darn conclusive. It would be tuft to beat that mod for turbulence reduction.

Thanks for that. Very professional looking. My wheels are turning to figure out a set for my van.

Oh the puns!