Burn pattern opinions
Burn pattern opinions
(OP)
What causes some areas of the combustion chamber to coat with carbon while other areas remain clean?


INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: Burn pattern opinions
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Burn pattern opinions
RE: Burn pattern opinions
So the flame travel stops because conditions are unfavorable for combustion, low temperatures and/or poor air/fuel mixture. Therefore modifications that enhance mixture quality should extend flame travel and accomplish complete burn.
Would the additional heat in the end gas zone promote detonation?
RE: Burn pattern opinions
Also, liquid fuel particles are much heavier than air, and I would expect, tend to flow straight out from the valve whereas the air turns the corner easier, so I would expect richer.
Soot collects on some areas, but burns off others, so it can be no soot on cold surfaces, or less soot on hot surfaces, depending on mixture, power output and running conditions.
There is more to it I am sure, but I do not have time to elaborate my thoughts right now.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Burn pattern opinions
Thanks, I would love to here more when time permits
RE: Burn pattern opinions
The piston dome is an integral portion of the combustion chamber and the movement of the piston causes a focusing effect of the air-fuel mixture.
Cylinder wall wetting also contributes to hot and cold sections of the combustion chamber, along with carbon deposits and other mechanical factors.
Franz
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Burn pattern opinions
RE: Burn pattern opinions