This is on-topic.
The infinity wing is very close to what you have. Adding a triangular end plate might be enough. It presents a concave curved surface, but that might not be important.
Basically it induces a vortex over the top third of the wheel's face, creating an air curtain without the external duct.
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
___________________
.
.Necessity is the mother of invention, but simplicity is it's favorite aunt --Amish proverb
|