NDLI: Effects of the direct-injected fuel Physical Properties under early and late Reactivity Controlled Compression Ignition ( RCCI ) Combustion

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Effects of the direct-injected fuel Physical Properties under early and late Reactivity Controlled Compression Ignition ( RCCI ) Combustion

Content Provider	Semantic Scholar
Author	Chuahy, Flavio D. F. Kokjohn, Sydney
Copyright Year	2015
Abstract	An experimental and computational study was conducted to explore the effects of the physical properties of the high reactivity fuel in a Reactivity Controlled Compression Ignition (RCCI) combustion dual-fuel strategy. In all studies, methane was used as the low reactivity fuel. The effect of high reactivity fuel physical properties was investigated by comparing the results of engine experiments using two fuels with equal cetane numbers, but different boiling characteristics. The two fuels are 1) a certification grade Ultra Low Sulfur Diesel (ULSD) fuel with a cetane number of 45 and 2) a blend of 21% iso-octane and 89% n-heptane with a cetane number of 45. Computational fluid dynamics (CFD) modeling using the KIVA-3v code with a discrete multi-component evaporation model capable of capturing important physical property influences and a multi-fuel chemistry model capable of describing the chemical kinetics of single and multi-component fuels was used to assess the need to consider multi-component evaporation under RCCI operating conditions. It was found that the different boiling curves of the two fuels have significant effects on the combustion phasing at early injection timings, where combustion is kinetically controlled, and virtually no effect at late injection timings, where combustion is mixing controlled. ILASS Americas 27th Annual Conference on Liquid Atomization and Spray Systems, Raleigh, NC, May 2015
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ilass.org/2/conferencepapers/28_2015.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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