In a message dated 12/6/2004 7:51:22 AM Pacific Standard Time, BillB@bnj.com
writes:
But isn't the whole idea to develop laminar flow, not turbulent? At the
point where it changes, there should be a fairly big discontinuity in flow
rate, no?
Avoiding turbulence is the whole reason we try to keep passages straight,
smooth changes in cross-section, etc.
Its been along time since I open a chemical engineering book. However, I seem
to recall that the fundamental reason for keeping piping straight and rounded
was to minimize the resistance to any type of flow. I can understand that
would be very important to the passages leading to the combustion chamber be
straight and smooth. But I would think that we would want some substantial
mixing
(turbulence) created as the fluid/gases entry in into the combustion chamber
itself. Thereafter we would want to remove the gases as easily as possible,
meaning as straight and smooth as possible. Seems I am missing something.
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