Successful imaging of the preheat zone of a lean (I center dot < 0.6) flame: the potential capability of acetone-OH simultaneous PLIF to diagnose flames at the near-extinction limit
A strategy to image the preheat zone of a very lean, laminar premixed flame (whose equivalence ratio, I center dot, is   0.54). Therefore, acetone-OH simultaneous PLIF presents itself as a promising technique capable of visualizing the preheat zone without knowledge of the temperature distribution, even at the near-extinction limit.
preheat zone plif lean premixed flame combustion diagnostics