Abstract
Ignition delay time measurements in high-temperature propane-air mixtures have been performed behind reflected shock wave at temperatures T = 1043 ÷ 1778 K, pressures p = 17.7 ÷ 42.8 atm, and equivalence ratios φ = 0.5, 1.0, and 2.0. Simultaneously, the emission characteristics of the flammable mixture associated with the emission of electronically excited OH* radical were recorded. The available detailed kinetic mechanisms of propane ignition were used to describe the obtained experimental data. Sensitivity analyses of the propane-air mixtures with various equivalence ratios was carried out to single out the key reactions proceeded in these mixtures. The data obtained make it possible to specify the available information on the ignition of combustible mixtures and thereby to improve the understanding of the processes occurring in the combustion chambers.
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