[Diy_efi] Rich detonation?
Becker, Damon Damon
damonb
Tue Nov 21 06:51:11 UTC 2006
Sorry for not trimming.
Activation energy is being achieved in each case (rich and lean). I don't think the answer lies in "which molecules break apart under which conditions" type of analysis. Combustion Kinematics supports the "richer = faster combustion" theory. To my surprise, there is a rich limit. I have my degree in this stuff and I, honestly, don't fully understand why that max velocity exists.
Taking the issue one step further to the subject of the thread, I also am not 100% confident in my answer as to why rich detonation occurs. I suppose I should have made that clear.
My reason this phonemona exists was what makes sense to me, given the research and experience I have, which both of which I think support my conclusions.
-----Original Message-----
From: diy_efi-bounces at diy-efi.org on behalf of Adam Wade
Sent: Mon 11/20/2006 10:51 AM
To: diy_efi at diy-efi.org
Cc:
Subject: RE: [Diy_efi] Rich detonation?
That doesn't make sense. Richer burns cooler, plus
there are not enough oxygen atoms to completely
combust the fuel in any given area. Less fuel burning
+ fuel burning at lower temp = slower burn rate (on
both counts), if basic physics is correct. Cooler
temps mean fewer actual molecular breaks and
reformations, as there's less energy available to do
the breaking; fewer oxygen atoms mean that some
fraction of the energy used in breaking apart the
hydrocarbon chains never gets "returned-and-then-some"
from oxidization.
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