Experimental-stochastic investigation of the combustion cyclic variability in HSDI diesel engine using ethanol-diesel fuel blends

Rakopoulos, DC; Rakopoulos, CD; Giakoumis, EG; Papagiannakis, RG; Kyritsis, DC

dc.contributor.author	Rakopoulos, DC	en
dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Giakoumis, EG	en
dc.contributor.author	Papagiannakis, RG	en
dc.contributor.author	Kyritsis, DC	en
dc.date.accessioned	2014-03-01T01:28:22Z
dc.date.available	2014-03-01T01:28:22Z
dc.date.issued	2008	en
dc.identifier.issn	0016-2361	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18828
dc.subject	diesel engine	en
dc.subject	ethanol-diesel blends	en
dc.subject	combustion	en
dc.subject	cyclic variability	en
dc.subject	stochastic analysis	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	HEAT RELEASE ANALYSIS	en
dc.subject.other	VEGETABLE-OIL	en
dc.subject.other	COMPARATIVE PERFORMANCE	en
dc.subject.other	2ND-LAW ANALYSIS	en
dc.subject.other	BIO-DIESEL	en
dc.subject.other	EMISSIONS	en
dc.subject.other	INJECTION	en
dc.subject.other	OPERATION	en
dc.subject.other	BIOFUELS	en
dc.subject.other	MODEL	en
dc.title	Experimental-stochastic investigation of the combustion cyclic variability in HSDI diesel engine using ethanol-diesel fuel blends	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.fuel.2007.08.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.fuel.2007.08.012	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	An experimental investigation is conducted to evaluate the combustion characteristics of a fully instrumented, high-speed, direct injection (HSDI), standard "Hydra' diesel engine, at various loads when using ethanol-diesel fuel blends up to 15% by vol. ethanol. In each test. combustion chamber and fuel injection pressure diagrams of many consecutive cycles were obtained using a specially developed, high-speed, data acquisition and processing system. Following a performance and exhaust emissions investigation and a heat release analysis of the measured cylinder pressure diagrams reported by the authors, the present work focuses on the cycle-by-cycle combustion variation (cyclic variability) as reflected in the pressure indicator diagrams, by analyzing for the maximum pressure, maximum pressure rate, (gross) indicated mean effective pressure, and dynamic injection timing and ignition delay. These parameters were analyzed using stochastic analysis techniques for averages, standard deviations, coefficients of variation, probability density functions, auto-correlations, power spectra and cross-correlation coefficients. Thus, any cause and effect relationship between cyclic pressure variations and the injection system or the kind of fuel used can be revealed, given the concern for the low cetane number of ethanol blends promoting cyclic variability that can lead to degraded performance and emissions characteristics. (C) 2007 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	FUEL	en
dc.identifier.doi	10.1016/j.fuel.2007.08.012	en
dc.identifier.isi	ISI:000255116500005	en
dc.identifier.volume	87	en
dc.identifier.issue	8-9	en
dc.identifier.spage	1478	en
dc.identifier.epage	1491	en