Effects of the fuel injection parameters on the performance and emissions formation in a large-bore marine diesel engine

Andreadis, P; Zompanakis, A; Chryssakis, C; Kaiktsis, L

dc.contributor.author	Andreadis, P	en
dc.contributor.author	Zompanakis, A	en
dc.contributor.author	Chryssakis, C	en
dc.contributor.author	Kaiktsis, L	en
dc.date.accessioned	2014-03-01T01:35:37Z
dc.date.available	2014-03-01T01:35:37Z
dc.date.issued	2011	en
dc.identifier.issn	1468-0874	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21123
dc.subject	computational fluid dynamics	en
dc.subject	evolutionary algorithms	en
dc.subject	marine diesel engines	en
dc.subject	multiple injections	en
dc.subject	optimization	en
dc.subject.other	Automotive engine	en
dc.subject.other	Computational Fluid Dynamics codes	en
dc.subject.other	Computational studies	en
dc.subject.other	Constraint problems	en
dc.subject.other	Design variables	en
dc.subject.other	Engine optimization	en
dc.subject.other	Full-load	en
dc.subject.other	Injection parameters	en
dc.subject.other	Injection profile	en
dc.subject.other	marine diesel engines	en
dc.subject.other	Maximum cylinder pressure	en
dc.subject.other	Maximum pressure	en
dc.subject.other	Multi objective	en
dc.subject.other	multiple injections	en
dc.subject.other	Objective functions	en
dc.subject.other	Oil consumption	en
dc.subject.other	Optimum solution	en
dc.subject.other	Parameterizing	en
dc.subject.other	Performance and emissions	en
dc.subject.other	Pilot injection	en
dc.subject.other	Set-ups	en
dc.subject.other	Three problems	en
dc.subject.other	Two-stroke marine diesel engines	en
dc.subject.other	Work output	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Evolutionary algorithms	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Fluids	en
dc.subject.other	Fuel injection	en
dc.subject.other	Fuel oils	en
dc.subject.other	Fuels	en
dc.subject.other	Marine engines	en
dc.subject.other	Multiobjective optimization	en
dc.subject.other	Nitric oxide	en
dc.subject.other	Nitrogen oxides	en
dc.subject.other	Sensitivity analysis	en
dc.subject.other	Diesel engines	en
dc.title	Effects of the fuel injection parameters on the performance and emissions formation in a large-bore marine diesel engine	en
heal.type	journalArticle	en
heal.identifier.primary	10.1243/14680874JER511	en
heal.identifier.secondary	http://dx.doi.org/10.1243/14680874JER511	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	Reductions in the emissions of nitrogen oxides (NOx) and soot from marine diesel engines can be supported by employing multiple-injection strategies, similar to those used in automotive engines. In the present computational study, the possibility of improving the operation of a large two-stroke marine diesel engine at full load by implementing an appropriate pilot injection is explored. A KIVA-3-based computational fluid dynamics code is used, coupled with an evolutionary algorithm. Multi-objective engine optimization is performed by parameterizing the fuel injection profiles in terms of four design variables, which fully define the pilot and main injections. Two objective functions are defined: the final NOx concentration and the specific fuel oil consumption (SFOC), both normalized by the corresponding values of a reference case of continuous injection. Three problem set-ups have been considered: first, an unconstrained problem; second, a problem constrained by the maximum cylinder pressure; third, a problem constrained by both the maximum pressure and the minimum work output per engine cycle. It is found that, in both the unconstrained and the one-constraint problems, the optimum solutions are characterized by substantial improvements in the NOx emissions (of the order of 15-20 per cent) and the SFOC (of the order of 2 per cent). The improvements are less pronounced when both constraints are imposed. A detailed sensitivity analysis of the effects of each of the design variables is presented. © Authors 2011.	en
heal.publisher	PROFESSIONAL ENGINEERING PUBLISHING LTD	en
heal.journalName	International Journal of Engine Research	en
dc.identifier.doi	10.1243/14680874JER511	en
dc.identifier.isi	ISI:000287231600002	en
dc.identifier.volume	12	en
dc.identifier.issue	1	en
dc.identifier.spage	14	en
dc.identifier.epage	29	en