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Ignition Probability in a Fuel Spray

Application of the stochastic ignition theory to spontaneous ignition in an n-octane fuel spray injected into high-temperature air behind reflected shock waves in a shock tube is statistically investigated. The total space into which the fuel is injected is optically divided into 25 sections and the induction period of ignition in each section is separately, but at the same time, measured, using several photomultipliers. From the histogram of the ignition induction period in each section obtained by repeating the same experiment many times, the temporary and spatial distributions of ignition probability in the fuel spray are obtained.