High-temperature oxidation of ethanol. Part 1.—Ignition delays in shock waves
Abstract
The ignition characteristics of ethanol–oxygen mixtures have been studied behind reflected shock waves from 1080 to 1660 K, in the pressure range 1.8–4.6 bar and with equivalence ratios, ϕ, varying from 0.25 to 2, through measurements of the ignition delay times associated with pressure rise, τp, or light emission, τCO–O and τOH. Multiple regression analysis was applied to all the measured ignition delay times, τ in seconds, the reactant concentrations in mol cm–3, and the corresponding temperatures in K, yielding the global relations: τOH= 10–12.7 exp (
The regression analysis of variance indicated that the fitted equations are good predictors of the data in each case and regression of τP on τCO–O showed that they are experimentally indistinguishable.