How a bell mouth affects flow
How a bell mouth affects flow
(OP)
Hi there, I hope you can help. I am working on an inlet manifold for a 4 cylinder turbocharged engine.
Without a flowbench I cannot anser this so I hope someone on here can, what is the optimum position for a bellmouth in relation to the wall of the plenum. EG Where the inlet runner enters the plenum, how far into the plenum should the bell mouth protrude?
Thanks in advance.
Without a flowbench I cannot anser this so I hope someone on here can, what is the optimum position for a bellmouth in relation to the wall of the plenum. EG Where the inlet runner enters the plenum, how far into the plenum should the bell mouth protrude?
Thanks in advance.





RE: How a bell mouth affects flow
RE: How a bell mouth affects flow
Mark
RE: How a bell mouth affects flow
So, if this is a correct assumption, would it be fair to say that profiling the entry to each bell mouth according to this distribution of air to tune the amount drawn into each runner would even out this distribution? By this I mean that a large "lip" on bell mouth number 1, a smaller lip on 2, and even smaller on 3, and perhaps no lip on 4, would cause each bell mouth to "attract" the air flow in varying degrees which might go some way to cancelling out the unequal flow of air into the bell mouths that I described at the top of this reply.
Does anyone understand and/or agree with any of this?
James.
RE: How a bell mouth affects flow
RE: How a bell mouth affects flow
I know space isn't at a premium, so maybe this, along with the cost aspect, is a stupid idea anyway! I'm sure you could slap a sleek bonnet bulge on if you wanted to try it and needed an inch or few extra above.
James.