Modeling of the ion current developed in a direct-injection diesel engine

Rahul Srinivas Rao, Damon Robert Honnery

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This paper presents a modelling study of the ion current produced in a direct-injection diesel engine. A phenomenological diesel engine model is developed that uses established spray, entrainment and heat transfer submodels and an ionic mechanism for n-heptane to solve for heat release, species concentrations and the ion current in the combustion chamber at different engine load settings. These predictions are compared to experimental results. Good agreement is found for the in-cylinder pressure and apparent heat release rate, with average absolute errors of 2.98% and 9.36% respectively. The ion current peaks are predicted fairly well with an average absolute error of 12.56%. The widths of the ion current peaks are significantly under-predicted and their positive offset due to soot is not modelled.
Original languageEnglish
Title of host publicationAustralian Combustion Symposium 2015 Proceedings
EditorsYi Yang, Nigel Smith
Place of PublicationMelbourne Australia
PublisherThe Combustion Institute - Australian and New Zealand Section
Pages52 - 55
Number of pages4
Publication statusPublished - 2015
EventAustralian Combustion Symposium 2015 - University of Melbourne, Melbourne, Australia
Duration: 7 Dec 20159 Dec 2015


ConferenceAustralian Combustion Symposium 2015

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