Vortex Generator...

[mito22]

.. negli USA ? una cosa che va molto...

Praticamente 'spezza' il flusso aerodinamico e creando vortici ad alta velocit? d? pi? carico aerodinamico al retrotreno della macchina...



Parecchio brutto.. ma sai mai che vada bene..

[LukeRS4]

..cercavi un subbi e hai trovato il vortex?

[mito22]

Luke.. no...

[Teo-HDi]

Beh, se messo su certe auto non è nemmeno poi così malaccio...

[GT-V7]

.. negli USA ? una cosa che va molto...

Praticamente 'spezza' il flusso aerodinamico e creando vortici ad alta velocit? d? pi? carico aerodinamico al retrotreno della macchina...



Parecchio brutto.. ma sai mai che vada bene..

senza dubbio grandioso... questo me piace...

ma... ragazzi vi prego, fermate il w.m. ? un appello.... se fa sul serio... appena cambia auto decolliamo...

[Riddick]

esteticamente a mè nn piace nulla...in compenso la subby bianca ha i sottoparaurti spettacolari!!!!!!!!

[Lorycrf]

In aviation, vortex generators are used to decrease wind stall speed. Now vehicles designed to fly typically move much faster than those that drive. So when I first read about these for use in the automotive industry, I was quite skeptical.



But then, I came across this technical paper written in 2004 - it was published by Mitsubishi motors (pdf). I’ll paraphrase for you - in case you don’t like reading technical papers.



They found that if you place these vortex generators (VGs) just in front of where flow detaches - you can lower your cD (coefficient of drag) by up to 0.006. In this case, an Evo Lancer was used as a model.

The trick is to use a delta wing foil that is no higher than the flow boundary layer (the portion of air that is attached to the car). Any taller and you will have an increase in drag. You also should have about 100mm of space between each foil.



The best evidence supporting is the CFD (computational fluid dynamics) done by Mitsubishi. Below show two images — side by side showing with (left) and without (right) VGs. Notice that flow stays attached to the vehicle longer with VGs (a good thing) and the blue low pressure zone (aka drag) drops away more quickly.



Now in the second picture (top view), notice that the top of the trunk has more high pressure zones with the VGs - again a good thing. It should be noted that there’s also blue areas of drag just behind the VGs, but Mitsubishi measured a net decrease in cD.



In summary, vortex generators have show in Mitsubishi’s testing a decrease in cD of 0.006. In my opinion they’s quite ugly - but form does follow function. Before you go any buy a highfalutin $300 carbon fiber VG for your mid-sized sedan, just think of the cost v benefit. I highly doubt you’re going to recover that money while you own that car.

All this means is that we can no longer heckle that “riced” out car’s VGs - they actually serve some sort of ugly purpose unlike that even uglier picnic table wing…

Da un sito inglese...

[Scorpion]

la mitsubishi lo dava come optional sulla evo9

[mito22]

Grande Lory... ottimo...

[benjofactory]

non mi piace

[MadMike top aBBuse]

..."spezza" il flusso aerodinamico e creando vortici ad alta velocit? d? pi? carico al retrotreno della macchina...

Vero, qualcosa del genere cell? dietro al paraurti di Ur$ula, per? in posizione bassa, tra i 4 scarichi.