Originally posted by Auto-X Fil:
There's no laminar flow in a system like this. It's pressure and velocity changes that designers try to minimize.




Originally posted by Auto-X Fil:
and they have found that there is so little laminar flow in any intake that it's not worth designing around: and if there is ANY power to be found, the FSAE guys will design for it!




Well I did an independent study on internal combustion engine intake manifold design my senior year of my mechanical engineering program and I'm not so sure about the statement. It depends on the surface roughness, which will determine the boundary layer thickness. I also designed an optimized intake system for my schools FSAE car as well.

Well for those of you wondering about this stuff here is some food for thought:




These are couple of copies out of a book written by Richard Stone entitled "Introduction to Internal Combustion Engines", which can probably be checked out at any local library.

It's a pretty good book for anyone with a curious mind. The formulas shown on those pages are pretty much what goes into intake design these days. I mean this is some old information, but a lot of the same stuff applies into todays modern cars/trucks. I think Tom mentioned this earlier as well.


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