flame holders too
That's an interesting concept, what size of atomised droplet of fuel is just too big? In jet aircraft there must be a problem too, so-called flame holders I'm led to believe induce a carefully induced localised turbulence allowing the flame to "burn back" onto the burner and be stable and not lift-off and blow away. Is there a size restriction for that as well? Also might it not be the case that it just gets too difficult to practically control rich and weak extinction in engines that are very small.