Experimental and modeling study of the oxidation of F-24 jet fuel, and its mixture with an iso-paraffinic synthetic jet fuel, ATJ

Abstract

Single pulse shock tube experiments were conducted to determine the oxidative decomposition products of F-24. Experiments were performed at 50 bar nominal pressure, 7 ms nominal reaction time, temperatures ranging from 800 K to 1300 K, initial fuel concentration of 655 ppm, and equivalence ratio of 0.93. F-24 is Jet A with additives. Experiments with Jet A were performed at similar conditions to show there were no main differences between the two jet fuels in order to use chemical kinetic models developed for Jet A for the simulation of F-24. Additional experiments for pure ATJ and ATJ/F-24 mixture at matching conditions were performed to analyze the effect of mixing a kerosene-based jet fuel with a synthetic jet fuel. ATJ is a synthetic alcohol-to-jet fuel that can be classified as Jet A. Gas chromatography (GC) and two-dimensional GC (GCxGC) was used to analyze the products of the chemical reactions and to determine their mole fractions. The speciation measurements were compared against three different jet fuel surrogate models. A detailed and a reduced model from the CRECK Modeling Group, and the second-generation surrogate model developed in house by Malewicki et al. The ability of the kinetic model to capture the effect of varying the experimental test conditions on the evolution of intermediate species is discussed and kinetic analyses have been conducted to identify the important reaction pathways.