Development and validation of a comprehensive two-zone model for combustion and emissions formation in a DI diesel engine

Rakopoulos, CD; Rakopoulos, DC; Kyritsis, DC

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Rakopoulos, DC	en
dc.contributor.author	Kyritsis, DC	en
dc.date.accessioned	2014-03-01T01:18:52Z
dc.date.available	2014-03-01T01:18:52Z
dc.date.issued	2003	en
dc.identifier.issn	0363-907X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15233
dc.subject	diesel engine	en
dc.subject	two-zone model	en
dc.subject	combustion	en
dc.subject	emissions formation	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	SIMULATION	en
dc.subject.other	OPERATION	en
dc.title	Development and validation of a comprehensive two-zone model for combustion and emissions formation in a DI diesel engine	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/er.939	en
heal.identifier.secondary	http://dx.doi.org/10.1002/er.939	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	A two-zone model for the calculation of the closed cycle of a direct injection (DI) diesel engine is presented. The cylinder contents are taken to comprise a non-burning zone of air and another homogeneous zone in which fuel is continuously supplied from the injector holes during injection and burned with entrained air from the air zone. The growth of the fuel spray zone, consisting of a number of fuel-air conical jets equal to the injector nozzle holes, is carefully modelled by incorporating jet mixing to determine the amount of oxygen available for combustion. Application of the mass, energy and state equations in each one of the two zones yields local temperatures and cylinder pressure histories. For calculating the concentration of constituents in the exhaust gases, a chemical equilibrium scheme is adopted for the C-H-O system of the 11 species considered, together with chemical rate equations for the calculation of nitric oxide (NO). A model for the evaluation of soot formation and oxidation rates is incorporated. A comparison is made between the theoretical results from the computer program implementing the analysis, with experimental results from a vast experimental investigation conducted on a fully automated test bed, direct injection, standard 'Hydra'. diesel engine located at the authors' laboratory, with very good results, following a multiparametric study of the constants incorporated in the various sub-models. Pressure indicator diagrams and plots of temperature, NO, soot density and of other interesting quantities are presented as a function of crank angle, for various loads and injection timings, elucidating the physical mechanisms governing combustion and pollutants formation. Copyright (C) 2003 John Wiley Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	INTERNATIONAL JOURNAL OF ENERGY RESEARCH	en
dc.identifier.doi	10.1002/er.939	en
dc.identifier.isi	ISI:000186359900001	en
dc.identifier.volume	27	en
dc.identifier.issue	14	en
dc.identifier.spage	1221	en
dc.identifier.epage	1249	en