Thermodynamic analysis of the effects of fuel-side and air-side oxygen addition on diesel engine combustion characteristics and pollutant formation

Zannis, TC; Hountalas, DT; Yfantis, EA; Papagiannakis, RG

dc.contributor.author	Zannis, TC	en
dc.contributor.author	Hountalas, DT	en
dc.contributor.author	Yfantis, EA	en
dc.contributor.author	Papagiannakis, RG	en
dc.date.accessioned	2014-03-01T02:52:13Z
dc.date.available	2014-03-01T02:52:13Z
dc.date.issued	2009	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35869
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-70149111710&partnerID=40&md5=c3d8e40de355f3643af5ac83e31093e1	en
dc.subject.other	Combustion characteristics	en
dc.subject.other	Combustion pro-cess	en
dc.subject.other	DI diesel engine	en
dc.subject.other	Diesel oil	en
dc.subject.other	Direct injection diesel engines	en
dc.subject.other	Engine brakes	en
dc.subject.other	Enhancement techniques	en
dc.subject.other	Exhaust gas temperatures	en
dc.subject.other	Fuel jet	en
dc.subject.other	Fuel-oxygen	en
dc.subject.other	Fuel/air mixture	en
dc.subject.other	Intake air	en
dc.subject.other	Model prediction	en
dc.subject.other	Multi-zone combustion model	en
dc.subject.other	Multi-zone models	en
dc.subject.other	NO concentration	en
dc.subject.other	NO formation	en
dc.subject.other	Oxidation rates	en
dc.subject.other	Oxygen addition	en
dc.subject.other	Oxygen content	en
dc.subject.other	Oxygen fractions	en
dc.subject.other	Oxygenated fuel	en
dc.subject.other	Peak cylinder pressures	en
dc.subject.other	Pollutant emission	en
dc.subject.other	Pollutant formation	en
dc.subject.other	Relative impact	en
dc.subject.other	Soot formations	en
dc.subject.other	Temporal evolution	en
dc.subject.other	Theoretical result	en
dc.subject.other	Thermo dynamic analysis	en
dc.subject.other	Combustion	en
dc.subject.other	Combustion chambers	en
dc.subject.other	Cylinders (shapes)	en
dc.subject.other	Diesel engines	en
dc.subject.other	Diesel fuels	en
dc.subject.other	Dust	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Intake systems	en
dc.subject.other	Jets	en
dc.subject.other	Machine design	en
dc.subject.other	Mechanical engineering	en
dc.subject.other	Oxygen	en
dc.subject.other	Smoke	en
dc.subject.other	Soot	en
dc.subject.other	Thermoanalysis	en
dc.subject.other	Leakage (fluid)	en
dc.title	Thermodynamic analysis of the effects of fuel-side and air-side oxygen addition on diesel engine combustion characteristics and pollutant formation	en
heal.type	conferenceItem	en
heal.publicationDate	2009	en
heal.abstract	A multi-zone combustion model is used in the present study to examine the effect of increased in-cylinder oxygen availability (either by using oxygenated fuels or by increasing the oxygen percentage of intake air) on direct injection (DI) diesel engine performance characteristics and pollutant emissions. Simulations are produced for a single-cylinder DI diesel engine (""Lister LVI "") by keeping constant the oxygen content of in-cylinder fuel/air mixture and the engine brake torque. The effects of the two oxvgen-enhancement techniques on combustion characteristics, soot and NO concentrations inside the combustion chamber are examined using model predictions for a common diesel oil, a neat oxygenate and the case of increasing the oxygen fraction of intake air. The multi-zone model is also utilized to interpret the relative impact of fuel-side and air-side oxygen on soot formation mechanism by examining the temporal evolution of combustion characteristics and soot formation and oxidation rates inside the fuel jet zones. Evaluation of the theoretical results revealed that the increase of in-cylinder oxygen availability by both techniques resulted in earlier initiation of combustion, increase of peak cylinder pressure and increase of in-cylinder and exhaust NO concentrations. It resulted also in reduction of exhaust gas temperature and exhaust soot values. Fuel oxygen addition was proven to be more influential on combustion process and consequently, on soot and NO formation mechanism compared to oxygen-enhancement of intake air. This is attributed to the higher oxygen availability inside each fuel jet zone. which is observed in the case of oxygenated fuel combustion. Copyright © 2008 by ASME.	en
heal.journalName	ASME International Mechanical Engineering Congress and Exposition, Proceedings	en
dc.identifier.volume	3	en
dc.identifier.spage	471	en
dc.identifier.epage	480	en