Reference and Pure Component Fuel Characterization in an Ignition Quality Tester Derived Cetane Rating Unit

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Event
WCX™ 17: SAE World Congress Experience
Authors Abstract
Content
Primary diesel and gasoline reference fuels, along with secondary reference diesel fuels across a very broad cetane range were tested in an Ignition Quality Tester (IQT) unit using the ASTM D6890 protocol. Additionally, numerous pure component fuels across a range of hydrocarbon size and structure were evaluated. The reference fuels’ ignition delay (IGD) followed expected trends, however, the diesel PRF fuels in the low cetane range produced DCNs (derived cetane numbers) that were moderately higher (shorter IGDs) than their cetane reference values. From the perspective of fuel size, IGD shows a significant ‘shortening’ - faster nature with increased fuel carbon number. For a given carbon number fuel molecule, normal alkanes showed the ‘fastest’ IGD, with alkenes and branched alkyl aromatics leading to moderately longer IGDs. Cyclo-paraffins had the ‘slowest’ - longest IGDs. Various methods were used to determine the IGD of the various fuels. The pressure recovery start of combustion IQT criterion is quite comparable to the 5% energy release criterion often used in diesel engine combustion analysis. Companion modeling was also pursued in this study in order to further understand these experimental results.
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DOI
https://doi.org/10.4271/2017-01-0715
Pages
11
Citation
Luning Prak, P., Hamilton, L., Luning-Prak, D., and Cowart, J., "Reference and Pure Component Fuel Characterization in an Ignition Quality Tester Derived Cetane Rating Unit," SAE Int. J. Engines 10(3):1163-1173, 2017, https://doi.org/10.4271/2017-01-0715.
Additional Details
Publisher
Published
Mar 28, 2017
Product Code
2017-01-0715
Content Type
Journal Article
Language
English