Multi-zone modeling of Diesel engine fuel spray development with vegetable oil, bio-diesel or Diesel fuels

Rakopoulos, CD; Antonopoulos, KA; Rakopoulos, DC

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Rakopoulos, DC	en
dc.date.accessioned	2014-03-01T01:24:42Z
dc.date.available	2014-03-01T01:24:42Z
dc.date.issued	2006	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17400
dc.subject	Bio-diesel	en
dc.subject	Diesel engine	en
dc.subject	Fuel spray	en
dc.subject	Multi-zone	en
dc.subject	Vegetable oil	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	Combustion	en
dc.subject.other	Fuel injection	en
dc.subject.other	Mathematical models	en
dc.subject.other	Spraying	en
dc.subject.other	Bio-diesel	en
dc.subject.other	Multi-zone	en
dc.subject.other	Vegetabl oil	en
dc.subject.other	Diesel engines	en
dc.title	Multi-zone modeling of Diesel engine fuel spray development with vegetable oil, bio-diesel or Diesel fuels	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.enconman.2005.08.005	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.enconman.2005.08.005	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	This work presents a model of fuel sprays development in the cylinders of Diesel engines that is two-dimensional, multi-zone, with the issuing jet (from the nozzle) divided into several discrete volumes, called 'zones', formed along the direction of the fuel injection as well as across it. The model follows each zone, with its own time history, as the spray penetrates into the swirling air environment of the combustion chamber before and after wall impingement. After the jet break up time, a group of droplets is generated in each zone, with the model following their motion during heating, evaporation and mixing with the in-cylinder air. The model is applied for the interesting case of using vegetable oils or their derived bio-diesels as fuels, which recently are considered as promising alternatives to petroleum distillates since they are derived from biological sources. Although there are numerous experimental studies that show curtailment of the emitted smoke with possible increase of the emitted NO, against the use of Diesel fuel, there is an apparent scarcity of theoretical models scrutinizing the formation mechanisms of combustion generated emissions when using these biologically derived fuels. Thus, in the present work, a theoretical detailed model of spray formation is developed that is limited to the related investigation of the physical processes by decoupling it from the chemical effects after combustion initiation. The analysis results show how the widely differing physical properties of these fuels, against the normal Diesel fuel, affect greatly the spray formation and consequently the combustion mechanism and the related emissions. (c) 2005 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Energy Conversion and Management	en
dc.identifier.doi	10.1016/j.enconman.2005.08.005	en
dc.identifier.isi	ISI:000236522200020	en
dc.identifier.volume	47	en
dc.identifier.issue	11-12	en
dc.identifier.spage	1550	en
dc.identifier.epage	1573	en