Evaluation of a new computational fluid dynamics model for internal combustion engines using hydrogen under motoring conditions

Rakopoulos, CD; Kosmadakis, GM; Pariotis, EG

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Kosmadakis, GM	en
dc.contributor.author	Pariotis, EG	en
dc.date.accessioned	2014-03-01T01:30:25Z
dc.date.available	2014-03-01T01:30:25Z
dc.date.issued	2009	en
dc.identifier.issn	0360-5442	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19573
dc.subject	Internal combustion engine	en
dc.subject	CFD model	en
dc.subject	Hydrogen	en
dc.subject	Mixing	en
dc.subject	Motoring	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.other	COMPLEX GEOMETRIES	en
dc.subject.other	2ND-LAW ANALYSIS	en
dc.subject.other	DIESEL FUEL	en
dc.subject.other	BLENDS	en
dc.subject.other	PERFORMANCE	en
dc.subject.other	EMISSIONS	en
dc.title	Evaluation of a new computational fluid dynamics model for internal combustion engines using hydrogen under motoring conditions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.energy.2008.09.022	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.energy.2008.09.022	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The present work conducts a preliminary evaluation of a new CFD (computational fluid dynamics) model, which is under development at the authors' laboratory. Using this model, it is feasible to understand how the intake manifold and in-cylinder geometry affect the in-cylinder flow field and the mixing processes taking place in an Otto (spark-ignition) engine. The model is applied on a high-swirl, two-valve, four-stroke, transparent combustion chamber engine running under motoring conditions. To investigate the fuel-air mixing process, hydrogen is injected in the intake manifold. To evaluate the model three case studies are examined. First, the model is applied to simulate the external mixing in the intake manifold with a tee-mixer injection system. Secondly, the transient gas flow field in the intake manifold and engine cylinder is examined over the complete engine cycle. Finally, the transient mixing process in the intake manifold and the spatial and temporal distribution of species concentrations inside the cylinder are numerically computed using the developed model. To validate the model, the results obtained through the test cases examined are compared either with available experimental data or with simulated results, which are obtained using a commercially available CFD code applied under the same conditions. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	ENERGY	en
dc.identifier.doi	10.1016/j.energy.2008.09.022	en
dc.identifier.isi	ISI:000272105600019	en
dc.identifier.volume	34	en
dc.identifier.issue	12	en
dc.identifier.spage	2158	en
dc.identifier.epage	2166	en