Why does pressure build up in fenders?
Why does pressure build up in fenders?
(OP)
I have heard only very basic arguments as to why. I want to know what interaction does the tire have on the air stream to cause a high pressure in the fender? Is it really the tires fault or simply the fact that the fender is generaly open and traps air in the fender at a high pressure? How does this work?





RE: Why does pressure build up in fenders?
RE: Why does pressure build up in fenders?
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RE: Why does pressure build up in fenders?
RE: Why does pressure build up in fenders?
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Greg Locock
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RE: Why does pressure build up in fenders?
RE: Why does pressure build up in fenders?
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RE: Why does pressure build up in fenders?
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Pat
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RE: Why does pressure build up in fenders?
Dan - Owner

http://www.Hi-TecDesigns.com
RE: Why does pressure build up in fenders?
It wasn't too many years before he'd re-thought the large radius rocker panels, so I guess the early aero must be considered pretty rudimentary/elementary. nonetheless That 2C sure looks like a race car to me.
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Dan T
RE: Why does pressure build up in fenders?
One reason is that the airflows around the fender and underbody ahead of the wheel well tends to be of higher velocity and lower pressure. So when it dumps into the larger (diffusing) volume created by the wheel well, the airflow naturally loses velocity and locally increases in pressure.
To mitigate this situation, closed wheel race car bodywork use spoiler lips at the front edge of the wheel opening, fender louvers above the wheel well, and extractor ducts behind the wheel well. All of these devices serve to create a zone of reduced airflow pressure within the wheel well volume.
Regards,
Terry