Surrogate Definition and Chemical Kinetic Modeling for Two Different Jet Aviation Fuels

For
emulation of the chemical kinetic combustion phenomena and
physical properties of S-8 POSF 4734 and Jet-A POSF 4658, two surrogate
fuels were formulated by directly matching their molecular structure
and functional groups. The same functional groups, CH3,
CH2, CH, C, and phenyl, were chosen to formulate the S-8
and Jet-A surrogates with n-dodecane/2,5-dimethylhexane
(0.581/0.419 mole fraction) and n-dodecane/2,5-dimethylhexane/toluene
(0.509/0.219/0.272 mole fraction), respectively. The numerical results
using the surrogate fuels were compared with the experimental data
and the results predicted by other surrogate fuel formulation methods.
The results show that the present method can formulate surrogate mixtures
of both jet fuels and Fischer–Tropsch real fuels and reproduce
the combustion characteristics in homogeneous ignition and the flow
reactor oxidation process. The idea presented here could be extended
to other real fuels with the appropriate choice of surrogate fuel
components.