06-08-2011, 08:07 AM
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#1 (permalink)
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EcoModding Lurker
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Spoiler at back of a hatchback officially non-useless (SAE paper)
http://inderscience.metapress.com/ap...lts,1:110895,1
A Rear Spoiler of a New Type that Reduces the Aerodynamic Forces on a Mini-Van
Unfortunately, I don't have a subscription to either publisher, but if you read the two abstracts together, it's clear that an advanced vortex generating design at the back of a minivan has added downforce and reduced drag.
It sounds to me like turbolator tape or any of the various marketed VG designs could possibly help the Cd of a hatchback, SUV, or van--but I'd really like to get my hands on the actual spoiler involved here. Anybody have journal access or Hualei Chen and Inchul Kim on speed-dial?
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06-08-2011, 02:19 PM
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#2 (permalink)
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EcoModding Apprentice
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06-08-2011, 02:26 PM
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#3 (permalink)
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EcoModding Apprentice
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06-08-2011, 02:40 PM
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#4 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by khafra
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I'll try to inter library loan the articles from my university if nobody has a subscription or reports on the findings.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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06-08-2011, 03:02 PM
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#5 (permalink)
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Master EcoModder
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06-08-2011, 03:08 PM
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#6 (permalink)
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Master EcoModder
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Quote:
Originally Posted by Bill in Houston
this MIGHT be a picture of it...
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I've seen that before on here, and IIRC it was an intricate spoiler design made to help fill in the wake without creating additional drag in the process.
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Strayed to the Dark Diesel Side
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06-08-2011, 03:18 PM
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#7 (permalink)
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06-08-2011, 09:08 PM
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#8 (permalink)
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Cyborg ECU
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Quote:
Originally Posted by moorecomp
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That is one impressive diy spoiler build. Among the best projects I have seen for street appeal. Thanks for posting it. This is how I want final products in prominent places on the body exterior to look.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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06-10-2011, 05:51 PM
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#9 (permalink)
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Master EcoModder
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$22
Quote:
Originally Posted by khafra
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You should be able to purchase the Paper from SAE for $22 US,or get it little cheaper downloading it online from their site.It might have images such that you can reconstruct what they did. |
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06-10-2011, 10:29 PM
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#10 (permalink)
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Aero Deshi
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OK, Sorry to kill the party here, but there is a huge leap from a very highly designed spoiler for one particular vehicle, to Vortex Generators and Tabulators....
They aren't really on the same planet. So don't go making a case for those VG gimmicks to work based on this paper, it isn't even in the same realm. It isn't even a hatchback. VGs have been shown to have a very small benefit in some very specific cases, anywhere on the back part of a minivan style vehicle is not one of them.
Vortex Generators, still officially useless 99.5% of the time.
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