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- W1978660411 abstract "Here we report autoignition studies for five compositionally-distinct jet aviation fuels: Jet A; Jet A blended with the JP-8 additive package; two Fischer–Tropsch (F–T) jet fuels synthesized in gas-to-liquid processes, S-8 and Shell GTL; and a coal-to-liquid F–T fuel, Sasol IPK. Ignition delay time measurements were made in a heated shock tube at pressures from 8 to 39 atm and at a wide range of temperatures, from 651 to 1381 K, for gaseous jet fuel/air mixtures at equivalence ratios from 0.25 to 1.5. Ignition delay times were determined by monitoring pressure and electronically-excited OH chemiluminescence behind reflected shock waves. Experiments reveal three regions of reactivity: a high-temperature regime with positive apparent activation energy, for temperatures greater than approximately 900 K at 20 atm; a negative-temperature-coefficient (NTC) regime exhibiting slightly decreasing ignition delay with decreasing temperature, for approximately 750–900 K at 20 atm; and a low temperature regime where ignition delay returns to positive apparent activation energy, for temperatures less than approximately 750 K at 20 atm. Measurements for Jet A/air mixtures at a wide range of conditions quantify the ignition delay dependence on temperature, pressure, and equivalence ratio; where appropriate, scaling laws are reported. Comparison of ignition delay times for Jet A and the three F–T fuels studied shows that at high temperatures (T > 1000 K) and common conditions (fuel/air at ϕ = 1.0 and 20 atm) these four fuels have indistinguishable reactivity. However, in the NTC and low-temperature regimes the ignition delay times for these four fuels diverge, in accordance with their derived cetane numbers (DCNs), by up to a factor of three. Comparisons are made with predictions from literature jet fuel surrogate kinetic models for Jet A, S-8, and Shell GTL." @default.
- W1978660411 created "2016-06-24" @default.
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- W1978660411 date "2012-08-01" @default.
- W1978660411 modified "2023-10-06" @default.
- W1978660411 title "Autoignition studies of conventional and Fischer–Tropsch jet fuels" @default.
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- W1978660411 doi "https://doi.org/10.1016/j.fuel.2012.03.041" @default.
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