Development and validation of a multi-zone combustion model for performance and nitric oxide formation in syngas fueled spark ignition engine

Rakopoulos, CD; Michos, CN

dc.contributor.author	Rakopoulos, CD	en
dc.contributor.author	Michos, CN	en
dc.date.accessioned	2014-03-01T01:28:09Z
dc.date.available	2014-03-01T01:28:09Z
dc.date.issued	2008	en
dc.identifier.issn	0196-8904	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18730
dc.subject	multi-zone combustion model	en
dc.subject	syngas	en
dc.subject	spark ignition	en
dc.subject	performance	en
dc.subject	nitric oxide	en
dc.subject	knock	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Nuclear	en
dc.subject.other	PRODUCER GAS	en
dc.subject.other	RECIPROCATING-ENGINE	en
dc.subject.other	VEGETABLE-OIL	en
dc.subject.other	BIO-DIESEL	en
dc.subject.other	BIOMASS	en
dc.subject.other	GASIFICATION	en
dc.subject.other	EMISSIONS	en
dc.subject.other	BLENDS	en
dc.subject.other	NOX	en
dc.title	Development and validation of a multi-zone combustion model for performance and nitric oxide formation in syngas fueled spark ignition engine	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.enconman.2008.02.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.enconman.2008.02.011	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The development of a zero-dimensional, multi-zone combustion model is presented for predicting the performance and nitric oxide (NO) emissions of a spark ignition (SI) engine. The model is validated against experimental data from a multi-cylinder, four-stroke, turbocharged and aftercooled, SI gas engine running with syngas fuel. This alternative fuel, the combustible part of which consists mainly of CO and H-2 with the rest containing non-combustible gases, has been recently identified as a promising substitute of fossil fuels in view of environmentally friendly engine operation. The basic concept of the model is the division of the burned gas into several distinct zones, unlike the simpler two-zone models, for taking into account the temperature stratification of the burned mixture during combustion. This is especially important for accurate NO emissions predictions, since NO formation is strongly temperature dependent. The multi-zone formulation provides the chemical species concentrations gradient existing in the burned zones, as well as the relative contribution of each burned zone to the total in-cylinder NO formation. The burning rate required as input to the model is expressed as a Wiebe function, fitted to experimentally derived burn rates. All model's constants are calibrated at one operating point and then kept unchanged. Zone-resolved combustion related information is obtained, assisting in the understanding of the complex phenomena occurring during combustion in SI engines. Combustion characteristics of the lean-burn gas engine tested are provided for the complete load range, aiding the interpretation of its performance and knocking tendency. Computed NO emissions from the multi-zone model for various values of the engine load(i.e. air-fuel ratios) are presented and found to be in good agreement with the respective experimental ones, providing confidence for the predictive capability of the model. The superiority of the multi-zone model over its two-zone counterpart is demonstrated in view of its more realistic in-cylinder NO emissions predictions when compared to the available experimental data. (c) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	ENERGY CONVERSION AND MANAGEMENT	en
dc.identifier.doi	10.1016/j.enconman.2008.02.011	en
dc.identifier.isi	ISI:000259432900051	en
dc.identifier.volume	49	en
dc.identifier.issue	10	en
dc.identifier.spage	2924	en
dc.identifier.epage	2938	en