Quote:
Originally Posted by Isaac Zachary
The problem is that at the boundry layer of the combustion gasses it is pretty much impossible to get that high of temps. That's why you end up with unburnt fuel. The coolness of the metal surface (200 - 300 °F is cool in terms of starting and maintaining combustion) quenches the flame front causing it to not reach the very edge.
In a perfect world we'd have a 100% insulating surface with zero thermal mass on all the surfaces in a combustion chamber.
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Hmmm... good point.
However:
The quench distance when burning hydrogen is 0.5mm vs 2-2.5 mm for petrol/diesel.
ie: If the surfaces are producing a tiny amount of hydrogen the boundary layer becomes more hydrogen rich the closer you get to the surface.
So now;
your quench distance decreases; producing more surface heat and thus more hydrogen in a positive feedback loop.
IMHO 'the proof's in the eating' as can be evidenced from my earlier link where this idea WORKED! And worked well..!!!
You did read the study..?
Certainly well enough to make coating said surfaces (cheap/easy) worthwhile.