DI and IDI diesel engines combustion irreversibility analysis

Rakopoulos, CD; Andritsakis, EC

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Andritsakis, EC	en
dc.date.accessioned	2014-03-01T02:48:11Z
dc.date.available	2014-03-01T02:48:11Z
dc.date.issued	1993	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/33610
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0027844736&partnerID=40&md5=ed81270892cf9e9527ec5e0be08d1bdd	en
dc.subject.other	Combustion	en
dc.subject.other	Combustion chambers	en
dc.subject.other	Data processing	en
dc.subject.other	Engine cylinders	en
dc.subject.other	Fuel injection	en
dc.subject.other	Mathematical models	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Variational techniques	en
dc.subject.other	Direct injection (DI) diesel engines	en
dc.subject.other	Indirect injection (IDI) diesel engines	en
dc.subject.other	Irreversible combustion	en
dc.subject.other	Diesel engines	en
dc.title	DI and IDI diesel engines combustion irreversibility analysis	en
heal.type	conferenceItem	en
heal.publicationDate	1993	en
heal.abstract	This work presents the development of an original expression for the calculation of the rate of irreversibility produced during combustion and its application on the cylinders of two engines on which experiments were conducted at the authors' laboratory. The engines concern a high speed, direct injection (DI), naturally aspirated, single-cylinder, four-stroke, diesel engine, and a medium-high speed, indirect injection (IDI), turbocharged, multi-cylinder, four-stroke, diesel engine. The experimental data were processed for the determination of fuel reaction rate via a mathematical methodology for the computation of intensive and extensive properties variation rates under chemical equilibrium conditions of the combustion products mixture; the combustion irreversibility production rate was then computed from the fuel reaction rate via an original, transfer terms free, expression of the second law of Thermodynamics. The accumulated combustion irreversibility values of the DI engine cylinder, reduced by the combustion irreversibility produced per effective engine cycle, show an almost uniform variation against the reacted fuel fraction over a wide range of loads, injection timings and rotational speeds. An interesting variation analysis of similar nature is also performed for the IDI engine cylinder chambers over a wide range of loads and rotational speeds; here the IDI throttling irreversibility production variation is introduced, due to the mass exchanged between the combustion chambers. Thus very interesting aspects of the relevant combustion phenomena are revealed for both types of engines, which can lead to a deeper understanding of diesel engines performance.	en
heal.publisher	Publ by ASME, New York, NY, United States	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	30	en
dc.identifier.spage	17	en
dc.identifier.epage	32	en