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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/8988

Title: A three-zone heat-release rate model for dual-fuel combustion
Authors: Stewart, Jill
Clarke, Andrew
Issue Date: 2010
Publisher: Sage / © IMechE
Citation: STEWART, J. and CLARKE, A.A., 2010. A three-zone heat-release rate model for dual-fuel combustion. Proceedings of the Institution of Mechanical Engineers, Part C Journal of Mechanical Engineering Science, 224(11), pp. 2423-2434
Abstract: Dual-fuel engines are modified compression ignition engines where the primary fuel source is provided by a gaseous fuel, and ignition is provided by a reduced quantity of diesel: the pilot. The generally accepted description of the subsequent combustion process is that initially, around half of the pilot will burn and entrain some gaseous fuel in an overall rich process. Then the remaining pilot fuel burns with an increasing amount of the primary fuel until the final stage where a flame propagation process engulfs the remaining gaseous fuel. In this paper a three-zone model will be derived, benchmarked against data obtained for diesel combustion, and then applied to experimental data from a dual-fuel test program. The three-zone model will also be used to investigate the assumptions made regarding the mechanism of dual-fuel combustion proceeding in three-stages. It will be demonstrated that evidence was scant in support of the accepted description of three stages of dual-fuel combustion in a direct injection engine. The conclusion of this work is that that the dual-fuel combustion may be better considered as a diesel combustion process, where the gaseous fuel modifies the reaction zone surrounding each igniting droplet of the pilot fuel.
Version: Accepted for publication
DOI: 10.1243/09544062JMES1955
URI: https://dspace.lboro.ac.uk/2134/8988
Publisher Link: http://dx.doi.org/10.1243/09544062JMES1955
ISSN: 2041-2983
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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