Investigation of the temperature oscillations in the cylinder walls of a diesel engine with special reference to the limited cooled case

Rakopoulos, CD; Antonopoulos, KA; Rakopoulos, DC; Giakoumis, EG

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Antonopoulos, KA	en
dc.contributor.author	Rakopoulos, DC	en
dc.contributor.author	Giakoumis, EG	en
dc.date.accessioned	2014-03-01T01:20:41Z
dc.date.available	2014-03-01T01:20:41Z
dc.date.issued	2004	en
dc.identifier.issn	0363-907X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16010
dc.subject	diesel engine	en
dc.subject	cylinder walls	en
dc.subject	temperature oscillations	en
dc.subject	limited cooled	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	COMBUSTION-CHAMBER INSULATION	en
dc.subject.other	HEAT-TRANSFER	en
dc.subject.other	PERFORMANCE	en
dc.subject.other	COMPONENTS	en
dc.subject.other	EMISSIONS	en
dc.subject.other	FLUXES	en
dc.subject.other	MODEL	en
dc.subject.other	FLOW	en
dc.title	Investigation of the temperature oscillations in the cylinder walls of a diesel engine with special reference to the limited cooled case	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/er.1008	en
heal.identifier.secondary	http://dx.doi.org/10.1002/er.1008	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	This work investigates the interesting phenomenon of the temperature (cyclic) oscillations in the combustion chamber walls of a diesel engine. For this purpose, a comprehensive simulation code of the thermodynamic cycle of the engine is developed taking into account both the closed and the open parts of it. The energy and state equations are applied, with appropriate combustion, gas heat transfer, and mass exchange with the atmosphere sub-models, to yield cylinder pressure, local temperatures and heat release histories as well as various performance parameters of the engine. The model is appropriately coupled to a wall periodic conduction model, which uses the gas temperature variation as boundary condition throughout the engine cycle after being treated by Fourier analysis techniques. It is calibrated against measurements, at various load and speed conditions, from an experimental work carried out on a direct injection (DI), naturally aspirated, four-stroke, diesel engine located at the authors' laboratory, which has been reported in detail previously. After gaining confidence into the predictive capabilities of the model, it is used to investigate the phenomenon further, thus providing insight into many interesting aspects of transient engine heat transfer, as far as the influence that engine wall material properties have on the values of cyclic temperature swings. These swings can take prohibitive values causing high wall thermal fatigue, when materials of specific technological interest such as thermal insulators (ceramics) are used, and may lead to deterioration in engine performance. Copyright (C) 2004 John Wiley Soils, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	INTERNATIONAL JOURNAL OF ENERGY RESEARCH	en
dc.identifier.doi	10.1002/er.1008	en
dc.identifier.isi	ISI:000223724000004	en
dc.identifier.volume	28	en
dc.identifier.issue	11	en
dc.identifier.spage	977	en
dc.identifier.epage	1002	en