Isolated n-decane droplet combustion – Dual stage and single stage transition to “Cool Flame” droplet burning

Observations of “Cool Flame” burning for large diameter isolated droplets on board the International Space Station have stimulated interest in combustion initiation/generation of non-premixed combustion modes. For a number of n-alkane fuels at large initial droplet diameters, the initiation process was observed to first establish a hot flame condition that radiatively extinguished, followed by a quasi-steady, “Cool Flame” droplet burning mode....