Lean blowoff scaling of swirling, bluff-body stabilized spray flames

Lean blowoff behavior of spray flames in a bluff-body, swirl stabilized combustor has been investigated with regards to stability and compositional effects in order to study differences between several types of standard liquid alkanes and kerosene fuels. The blowoff limits of standard Jet-A, Gevo-ATJ kerosene, n-octane, iso-octane, heptane, and a decane/trimethlybenzene blend, are studied in collaboration with the National Jet Fuel Combustion Program in order to evaluate predicted correlations of the derived cetane number with the blowoff equivalence ratio. Scaling with the blowout Damköhler number show consistent trends across kerosene fuels indicating that the flame speed may play an important role with regards to blowoff timescales