Study of the steady and transient temperature field and heat flow in the combustion chamber components of a medium speed diesel engine using finite element analyses

Rakopoulos, CD; Mavropoulos, GC

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Mavropoulos, GC	en
dc.date.accessioned	2014-03-01T01:12:21Z
dc.date.available	2014-03-01T01:12:21Z
dc.date.issued	1996	en
dc.identifier.issn	0363-907X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12070
dc.subject	Diesel engine components	en
dc.subject	Finite elements	en
dc.subject	Transient temperature field	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Nuclear Science & Technology	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Combustion chambers	en
dc.subject.other	Computer simulation	en
dc.subject.other	Finite element method	en
dc.subject.other	Heat transfer	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Steady temperature field	en
dc.subject.other	Transient temperature field	en
dc.subject.other	Diesel engines	en
dc.title	Study of the steady and transient temperature field and heat flow in the combustion chamber components of a medium speed diesel engine using finite element analyses	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1099-114X(199605)20:5<437::AID-ER169>3.0.CO;2-J	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1099-114X(199605)20:5<437::AID-ER169>3.0.CO;2-J	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	The present work describes the development of a model for the calculation of the temperature field and heat flow in the combustion chamber components of internal combustion piston engines, which occur both under steady and transient engine operating conditions. Two and three-dimensional finite-element analyses were implemented for the representation of the complex geometry metal components (piston, liner and cylinder head). The model is applied for the piston and liner of a medium speed diesel engine, for which relevant experimental data exist in the literature. Special care is given for accurately specifying the thermal boundary conditions (temperatures and heat transfer coefficients). Gas side boundary conditions are calculated using a thermodynamic cycle simulation code, including spatial variation of the gas side heat transfer coefficient. Coolant sides (water on the external liner surface and oil on the piston undercrown surface) boundary conditions are calculated using correlations pertaining to real engine conditions. Also an effort is made to model the piston-ring belt-liner complex thermal paths using equivalent thermal circuits. A satisfactory degree of agreement is found between theoretical predictions and experimental measurements, revealing that the finite-element methods presented are successful in formulating this kind of problem, giving accurate results with reasonable computational cost. The utilization of the model reveals very clearly the essential role of engine operating transients (sudden changes in speed and/or load) in the generation of sharp temperature excursions in the metal components until a new steady state is reached. The phenomenon should be taken into account for correct engine design and safe operation (i.e. the avoidance of high local stresses). © 1996 by John Wiley & Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	International Journal of Energy Research	en
dc.identifier.doi	10.1002/(SICI)1099-114X(199605)20:5<437::AID-ER169>3.0.CO;2-J	en
dc.identifier.isi	ISI:A1996UL07800006	en
dc.identifier.volume	20	en
dc.identifier.issue	5	en
dc.identifier.spage	437	en
dc.identifier.epage	464	en