Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

freebeard · 10-05-2017, 07:40 PM

I'm no expert, despite the tag somebody put under my user name. I think that's based on number of posts. See if you can lure aerohead into the thread.

Basically, fluids like air have a pressure and a velocity at any given point. You can no more push air than you can push a rope.

https://en.wikipedia.org/wiki/Bernoulli%27s_principle

The most you can do is pool it in a plenum and suck it out through a port.
IMHO, the stagnant low-pressure air in the wake will be no more effective than the high-velocity air moving over the sides of the body. think of a reverse Coanda nozzle:

https://en.wikipedia.org/wiki/Coand%C4%83_effect

The picture is poorly lighted. How close is the sketch? Three-views would be nice. Is it gas/diesel or electric?

10-05-2017, 07:40 PM	#10 (permalink)
freebeard Master EcoModder Join Date: Aug 2012 Location: northwest of normal Posts: 28,520 Thanks: 8,073 Thanked 8,870 Times in 7,322 Posts	I'm no expert, despite the tag somebody put under my user name. I think that's based on number of posts. See if you can lure aerohead into the thread. Basically, fluids like air have a pressure and a velocity at any given point. You can no more push air than you can push a rope. https://en.wikipedia.org/wiki/Bernoulli%27s_principle The most you can do is pool it in a plenum and suck it out through a port. IMHO, the stagnant low-pressure air in the wake will be no more effective than the high-velocity air moving over the sides of the body. think of a reverse Coanda nozzle: https://en.wikipedia.org/wiki/Coand%C4%83_effect The picture is poorly lighted. How close is the sketch? Three-views would be nice. Is it gas/diesel or electric?