Nowadays, the leading driver for the development of internal combustion engines is the search for increased fuel efficiency and reduced emissions. To develop and optimize new combustion systems, a high degree of accuracy is needed in 3D-CFD simulations. In particular, detailed chemical kinetics models and fuel surrogates able to represent the main physical and chemical properties of the real commercial fuels are needed. A series of fuel surrogate formulation methodologies were presented in the recent past with the aim of matching fuel properties and combustion-related characteristics using a set of well-known compounds. While most of the gasoline-targeted available studies mainly focused on the possibility to simultaneously match the gross fuel properties, the evaporating characteristics and the auto-ignition behaviour of the fuel, none of them explicitly targeted the flame propagation characteristics. In this work, a novel methodology is introduced to formulate gasoline fuel surrogates able to match the main chemical and physical properties, the auto-ignition and the flame propagation characteristics of a commercial gasoline. Due to the increasing presence of oxygenated fuels in the market share, an average gasoline fuel named ULG95, representative of a European oxygenated gasoline with Research Octane Number RON = 95, is targeted to validate the presented methodology. Three fuel surrogates of increasing complexity are formulated and validated against laminar flame speed, shock-tube and rapid compression machine experiments available in literature for oxygenated gasolines. The results suggest that a unique gasoline fuel surrogate can be used, together with validated chemical kinetics mechanisms, to model auto-ignition and flame propagation characteristics.
A methodology to formulate multicomponent fuel surrogates to model flame propagation and ignition delay / Del Pecchia, M.; Fontanesi, S.. - In: FUEL. - ISSN 0016-2361. - 279(2020), pp. 1-33.
|Data di pubblicazione:||2020|
|Titolo:||A methodology to formulate multicomponent fuel surrogates to model flame propagation and ignition delay|
|Autore/i:||Del Pecchia, M.; Fontanesi, S.|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.fuel.2020.118337|
|Codice identificativo ISI:||WOS:000560685300007|
|Codice identificativo Scopus:||2-s2.0-85086910197|
|Citazione:||A methodology to formulate multicomponent fuel surrogates to model flame propagation and ignition delay / Del Pecchia, M.; Fontanesi, S.. - In: FUEL. - ISSN 0016-2361. - 279(2020), pp. 1-33.|
|Tipologia||Articolo su rivista|
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