Validation and sensitivity analysis of a two zone Diesel engine model for combustion and emissions prediction

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

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Rakopoulos, DC	en
dc.contributor.author	Giakoumis, EG	en
dc.contributor.author	Kyritsis, DC	en
dc.date.accessioned	2014-03-01T01:21:41Z
dc.date.available	2014-03-01T01:21:41Z
dc.date.issued	2004	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16313
dc.subject	Combustion	en
dc.subject	Emissions	en
dc.subject	Sensitivity analysis	en
dc.subject	Two zone Diesel model	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	Activation energy	en
dc.subject.other	Combustion	en
dc.subject.other	Computer program listings	en
dc.subject.other	Diesel fuels	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Enthalpy	en
dc.subject.other	Equations of state	en
dc.subject.other	Exhaust gases	en
dc.subject.other	Fuel injection	en
dc.subject.other	Mathematical models	en
dc.subject.other	Molecular weight	en
dc.subject.other	Nozzles	en
dc.subject.other	Oxidation	en
dc.subject.other	Particulate emissions	en
dc.subject.other	Sensitivity analysis	en
dc.subject.other	Soot	en
dc.subject.other	Direct injection (DI)	en
dc.subject.other	Internal energies	en
dc.subject.other	Two zone diesel model	en
dc.subject.other	Diesel engines	en
dc.title	Validation and sensitivity analysis of a two zone Diesel engine model for combustion and emissions prediction	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.enconman.2003.09.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.enconman.2003.09.012	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The present two zone model of a direct injection (DI) Diesel engine divides the cylinder contents into a non-burning zone of air and another homogeneous zone in which fuel is continuously supplied from the injector and burned with entrained air from the air zone. The growth of the fuel spray zone, which comprises a number of fuel-air conical jets equal to the injector nozzle holes, is carefully modelled by incorporating jet mixing, thus determining the amount of oxygen available for combustion. The mass, energy and state equations are applied in each of the two zones to yield local temperatures and cylinder pressure histories. The concentration of the various constituents in the exhaust gases are calculated by adopting a chemical equilibrium scheme 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 evaluation of the soot formation and oxidation rates is included. The theoretical results from the relevant computer program are compared very favourably with the measurements from an experimental investigation conducted on a fully automated test bed, standard ""Hydra"", DI Diesel engine installed at the authors' laboratory. In-cylinder pressure and temperature histories, nitric oxide concentration and soot density are among the interesting quantities tested for various loads and injection timings. As revealed, the model is sensitive to the selection of the constants of the fuel preparation and reaction sub-models, so that a relevant sensitivity analysis is undertaken. This leads to a better understanding of the physical mechanisms governed by these constants and also paves the way for construction of a reliable and relatively simple multi-zone model, which incorporates in each zone (packet) the philosophy of the present two zone model. © 2003 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.2003.09.012	en
dc.identifier.isi	ISI:000189385000013	en
dc.identifier.volume	45	en
dc.identifier.issue	9-10	en
dc.identifier.spage	1471	en
dc.identifier.epage	1495	en