Abstract
Ignition delay time behind a reflected shock wave is measured for a lean propane-air mixture with an equivalence ratio of ϕ = 0.5 in wide temperature and pressure ranges (T = 880–1500 K, P = 2–500 atm). Ignition-delay activation energy data obtained in this study are compared with earlier data. A detailed kinetic model is constructed for hydrocarbon ignition, which includes ignition mechanisms for low, high, and intermediate (1000– 1200 K) temperatures. Each of the mechanisms is analyzed. The effect of pressure on the mechanism of autoignition is demonstrated.
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