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dc.contributor.authorDempsey, A. B.
dc.contributor.authorFiveland, S. B.
dc.contributor.authorPost, Scott
dc.date.accessioned2017-12-11T21:10:40Z
dc.date.available2017-03-28en
dc.date.issued2017-04
dc.identifier.citationDempsey, A.B., Fiveland, S.B., & Post, S.L. (2017). Phenomenological autoignition model for diesel sprays using reduced chemical kinetics and a characteristic scalar dissipation rate. SAE International Journal of Engines, 10(2), 512-528. doi:10.4271/2017-01-0523
dc.identifier.issn1946-3944en
dc.identifier.urihttps://hdl.handle.net/10182/8844
dc.description.abstractThis study focuses on the development of an autoignition model for diesel sprays that is applicable to phenomenological multi-zone combustion models. These models typically use a single-step Arrhenius expression to represent the low-temperature chemistry leading up to autoignition. There has been a substantial amount of work done in the area of n-heptane autoignition in homogeneous mixtures. Reduced kinetic mechanisms with ten reactions or less have been proposed in the literature to represent the complex low-temperature oxidation of n-heptane. These kinetic models are attractive for multi-zone simulations because of the low number of reactions involved. However, these kinetic mechanisms and the multi-zone treatment of the fuel spray do not account for the effect of turbulence/chemistry interactions on the chemical reaction rate. In this work a correlation has been developed for the total ignition delay time that is a combination of the homogenous ignition delay and dissipation effects. The homogeneous ignition delay is predicted from a chemical reaction mechanism for n-heptane, and the dissipation effects are captured through a phenomenological expression for a characteristic scalar dissipation rate. The characteristic scalar dissipation rate includes effects of injection pressure, ambient density, and injector hole size. The characteristic scalar dissipation rate is compared to a critical scalar dissipation rate to assess the additional delay due to turbulence/chemistry interactions. The autoignition model was implemented into a multi-zone spray model and validated against constant volume ignition delay measurements of diesel sprays.en
dc.format.extent512-528 (17)en
dc.language.isoen
dc.publisherSAE International
dc.relationThe original publication is available from - SAE International - https://doi.org/10.4271/2017-01-0523en
dc.relation.urihttps://doi.org/10.4271/2017-01-0523en
dc.rights© 2017 SAE International
dc.subjectsimulation and modelingen
dc.subjectdiesel fuelsen
dc.subjectfuel injectionen
dc.subjectcombustion and combustion processesen
dc.titlePhenomenological autoignition model for diesel sprays using reduced chemical kinetics and a characteristic scalar dissipation rateen
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitLincoln Agritech
dc.identifier.doi10.4271/2017-01-0523en
dc.relation.isPartOfSAE International Journal of Enginesen
pubs.issue2en
pubs.organisational-group/LU
pubs.organisational-group/LU/Lincoln Agritech
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18
pubs.publication-statusPublisheden
pubs.volume10en
lu.identifier.orcid0000-0002-0421-8491


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