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Old 02-19-2017, 09:31 AM   #21 (permalink)
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Originally Posted by Shepherd777 View Post
Does anyone have an opinion regarding using vortex generators on the outside of the leading edge of the wheel well, in lieu of air curtains?
I had coffee with an aerodynamicists couple of days ago.

I would hate to misquote my new friend, but this very idea was proposed as a substitution for wheel spats in a conversation I had with this freelance aerodynamicists. That was one topic on the underside, we also talked about the sides.

Something akin to vortex generators can be used just before a front wheel opening to trip up the air into a smoother air flow over the wheel opening - at least that's what I think he implied.

He showed me some of his work, one example was of an CFD video of a wheel he was hired to examine and determine it's aerodynamic behavior.

He has past experience with several major automobile manufacturers, but has been on his own for a few months now.


I trust you can work something out if you want specific answers to your specific design questions.

There was also a recent forum discussion on a similar topic, some opinions expressed.


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Old 02-19-2017, 04:07 PM   #22 (permalink)
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I'd forgotten that example. The difference to the dive planes is that they aren't canted as you'd expect a vortex generator to be.

I guess it's like fences on a diverter, channeliizing the air so one large vortex doesn't form, which would carry energy further away from the surface.
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Old 02-24-2017, 02:40 AM   #23 (permalink)
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OP's pic:

I was driving in the rain on a two-lane road a few days ago. I saw a Ford truck with this sort of stance and the spray off the face of the wheel was minimal, but there was a decided jet coming out of the open top. This would suppress that.

Also, where most of the big rigs punched a small hole in the air, I met one that had spray three lanes wide — his, mine and the ditch. It was past by the time I wondered what sort of setup it was.

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