4.7 Article

Autoignition of ethanol in a rapid compression machine

Journal

COMBUSTION AND FLAME
Volume 161, Issue 5, Pages 1164-1171

Publisher

ELSEVIER SCIENCE INC
DOI: 10.1016/j.combustflame.2013.11.005

Keywords

Ethanol; Autoignition; Rapid compression machine

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Ethanol is a renewable source of energy and significant attention has been directed to the development of a validated chemical kinetic mechanism for this fuel. The experimental data for the autoignition of ethanol in the low temperature range at elevated pressures are meager. In order to provide experimental data sets for mechanism validation at such conditions, the autoignition of homogeneous ethanol/oxidizer mixtures has been investigated in a rapid compression machine. Experiments cover a range of pressures (10-50 bar), temperatures (825-985 K) and equivalence ratios of 0.3-1.0. Ignition delay data are deduced from the experimental pressure traces. Under current experimental conditions of elevated pressures and low temperatures, chemistry pertaining to hydroperoxyl radicals assumes importance. A chemical kinetic mechanism that can accurately predict the autoignition characteristics of ethanol at low temperatures and elevated pressures has been developed and this mechanism is compared with other models available in the literature. (C) 2013 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

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