View Single Post
Old 11-27-2019, 12:32 PM   #6 (permalink)
freebeard
Master EcoModder
 
freebeard's Avatar
 
Join Date: Aug 2012
Location: northwest of normal
Posts: 15,382
Thanks: 3,912
Thanked 5,118 Times in 4,077 Posts
Quote:
The bell shape (which I'm not seeing; the plates look parallel to me, considering that the rear body tapers inward after the wheels on a C4), along with the upward slope under the body, forms a divergent duct with the ground--which will decelerate airflow, not accelerate it....
I guess I confuse easily. There is some advantage to a divergent duct isn't there? Trading velocity for pressure going into the wake?

I wish I had taken more pictures. The shape isn't obvious from that angle. It curved from close inside the wheel to the outer face.

This divergent bell was tested in CFD by another member of this forum. I may have time to find that later.
__________________
.
The lonesome friends of science say the world will end most any day,
well if it does than that's Okay 'cause I don't live here anyway.
I live down deep inside my head where long ago I made my bed...
John Prine RIP

_________________
  Reply With Quote