Intake-air oxygen-enrichment of diesel engines as a power enhancement method and implications on pollutant emissions

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

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.contributor.author	Levendis, YA	en
dc.date.accessioned	2014-03-01T02:52:42Z
dc.date.available	2014-03-01T02:52:42Z
dc.date.issued	2010	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36003
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77953195715&partnerID=40&md5=8eeca93f184eab3ea2b2e94eefe7ecba	en
dc.subject.other	Brake specific fuel consumption	en
dc.subject.other	Combustion air	en
dc.subject.other	Combustion characteristics	en
dc.subject.other	Combustion efficiencies	en
dc.subject.other	Combustion parameters	en
dc.subject.other	DI diesel engine	en
dc.subject.other	Effect of oxygen	en
dc.subject.other	Engine load	en
dc.subject.other	Engine simulation models	en
dc.subject.other	Equivalence ratios	en
dc.subject.other	Fuel jet	en
dc.subject.other	Ignition delays	en
dc.subject.other	In-cylinder mixing	en
dc.subject.other	Intake air	en
dc.subject.other	Naturally aspirated	en
dc.subject.other	NO concentration	en
dc.subject.other	NOx Emissions	en
dc.subject.other	Oxygen content	en
dc.subject.other	Oxygen mole-fraction	en
dc.subject.other	Pollutant emission	en
dc.subject.other	Power enhancement	en
dc.subject.other	Power out put	en
dc.subject.other	Soot emissions	en
dc.subject.other	Theoretical investigations	en
dc.subject.other	Unburned hydrocarbons	en
dc.subject.other	Air engines	en
dc.subject.other	Air intakes	en
dc.subject.other	Brakes	en
dc.subject.other	Computer simulation	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Engines	en
dc.subject.other	Fuel consumption	en
dc.subject.other	Fueling	en
dc.subject.other	Hydrocarbons	en
dc.subject.other	Ignition	en
dc.subject.other	Nitric oxide	en
dc.subject.other	Oxygen	en
dc.subject.other	Particulate emissions	en
dc.subject.other	Soot	en
dc.subject.other	Diesel engines	en
dc.title	Intake-air oxygen-enrichment of diesel engines as a power enhancement method and implications on pollutant emissions	en
heal.type	conferenceItem	en
heal.publicationDate	2010	en
heal.abstract	Increasing the in-cylinder oxygen availability of diesel engines is an effective method to improve combustion efficiency and to reduce particulate emissions. Past work on oxygen-enrichment of the intake air, revealed a large decrease of ignition delay, a remarkable decrease of soot emissions as well as reduction of CO and unburned hydrocarbon (HC) emissions while, brake specific fuel consumption (bsfc) remained unaffected or even improved. Moreover, experiments conducted in the past by authors revealed that oxygen-enrichment of the intake air (from 21% to 25% oxygen mole fraction) under high fuelling rates resulted to an increase of brake power output by 10%. However, a considerable increase of NOx emissions was recorded. This manuscript, presents the results of a theoretical investigation that examines the effect of oxygen enrichment of intake air, up to 30%v/v, on the local combustion characteristics, soot and NO concentrations under the following two in-cylinder mixing conditions: (1) lean in-cylinder average fuel/oxygen equivalence ratio (constant fuelling rate) and (2) constant in-cylinder average fuel/oxygen equivalence ratio (increased fuelling rate). A phenomenological engine simulation model is used to shed light into the influence of the oxygen content of combustion air on the distribution of combustion parameters, soot and nitric oxide inside the fuel jet, in all cases considered. Simulations were made for a naturally aspirated single-cylinder DI diesel engine ""Lister LV1"" at 2500 rpm and at various engine loads. The outcome of this theoretical investigation was contrasted with published experimental findings. Copyright © 2009 by ASME.	en
heal.journalName	Proceedings of the ASME Internal Combustion Engine Division Fall Technical Conference 2009	en
dc.identifier.spage	295	en
dc.identifier.epage	308	en