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Original Articles

Chemical Kinetic Mechanism of a Three-Component Fuel Composed of Iso-octane/n-Heptane/Ethanol

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Pages 627-644 | Received 19 Jul 2012, Accepted 09 Oct 2012, Published online: 29 Mar 2013
 

Abstract

A chemical kinetic mechanism for a three-component fuel composed of iso-octane/n-heptane/ethanol has been developed. The mechanism consists of 51 species and 204 elementary reactions. Two elementary reactions that significantly affect laminar flame speed are subjected to sensitivity analysis. The validated results show that the predictions using the present mechanism are in good agreement with the experimental ignition delay time and laminar flame speed. Both the chemical reaction and the transportation process are accurately reproduced by the simulation using the present model in iso-octane/air premixed flames and in n-heptane/air counterflow partially premixed flames. The chemical kinetic mechanism is applicable to multidimensional computational fluid dynamics simulations of the combustion of gasoline surrogates or the cocombustion of primary reference fuels (PRF) with ethanol because of its smaller number of species and fewer reactions.

ACKNOWLEDGMENT

This work was supported by National Natural Science Foundation of China (Contract No. 51036004).

Notes

Note: A, units mol-cm-s-K; E, units cal/mol.

a S, sensitivity coefficients of laminar flame speed: +, positive; −, negative.

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