Quasi-dimensional, multi-zone combustion modelling of turbulent entrainment and flame stretch for a spark ignition engine fuelled with hydrogen-enriched biogas

Rakopoulos, CD; Michos, CN

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Michos, CN	en
dc.date.accessioned	2014-03-01T01:31:44Z
dc.date.available	2014-03-01T01:31:44Z
dc.date.issued	2009	en
dc.identifier.issn	0143-3369	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19914
dc.subject	Biogas	en
dc.subject	Characteristic speeds	en
dc.subject	Combustion model	en
dc.subject	Flame propagation	en
dc.subject	Hydrogen enrichment	en
dc.subject	Multi-zone	en
dc.subject	Nitric oxide	en
dc.subject	Quasi-dimensional	en
dc.subject	Spark ignition engine	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Transportation Science & Technology	en
dc.subject.other	Characteristic speeds	en
dc.subject.other	Combustion model	en
dc.subject.other	Flame propagation	en
dc.subject.other	Hydrogen enrichment	en
dc.subject.other	Multi-zone	en
dc.subject.other	Quasi-dimensional	en
dc.subject.other	Spark ignition engine	en
dc.subject.other	Biogas	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Electric sparks	en
dc.subject.other	Engines	en
dc.subject.other	Forecasting	en
dc.subject.other	Hydrogen	en
dc.subject.other	Ignition	en
dc.subject.other	Nitric oxide	en
dc.subject.other	Smoke	en
dc.subject.other	Speed	en
dc.subject.other	Thermochemistry	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Turbulence	en
dc.subject.other	Flammability	en
dc.title	Quasi-dimensional, multi-zone combustion modelling of turbulent entrainment and flame stretch for a spark ignition engine fuelled with hydrogen-enriched biogas	en
heal.type	journalArticle	en
heal.identifier.primary	10.1504/IJVD.2009.024239	en
heal.identifier.secondary	http://dx.doi.org/10.1504/IJVD.2009.024239	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	A quasi-dimensional, multi-zone combustion model for spark ignition (SI) engines is analytically presented. The model is incorporated into a closed cycle simulation code for the prediction of performance and nitric oxide (NO) emissions of a SI engine operated on biogas, with small amounts of hydrogen added. The burning process is handled based on the combination of turbulent entrainment theory and flame stretch concepts. An expression of the turbulent burning velocity of a flamelet model is adopted for simulating the entrainment speed into the flame zone. A model of flame stretch is also used, in order to assess the flame response on combined effects of curvature, turbulent strain and preferential diffusion. In addition, the burned gas behind the flame is treated using a multi-zone thermodynamic formulation. In this way, the temperature and chemical species concentration gradients of the burned mixture can be captured, which are very important for accurate NO emissions predictions. After calibration of the model, illustrative diagrams are presented concerning the effect of hydrogen addition in biogas on burning rates, characteristic speeds, mass diffusivity of fuel and flame propagation. Furthermore, zone-resolved thermodynamic and geometric characteristics are given for the multiple burned zones. Finally, predictions of NO emissions are compared with the respective measured values. Copyright © 2009 Inderscience Enterprises Ltd.	en
heal.publisher	INDERSCIENCE ENTERPRISES LTD	en
heal.journalName	International Journal of Vehicle Design	en
dc.identifier.doi	10.1504/IJVD.2009.024239	en
dc.identifier.isi	ISI:000265427700002	en
dc.identifier.volume	49	en
dc.identifier.issue	1-3	en
dc.identifier.spage	3	en
dc.identifier.epage	51	en