Kinetic Modelling Study of Octane Number and Sensitivity of Hydrocarbon Mixtures in CFR Engines

2005-24-077

09/11/2005

Event
7th International Conference on Engines for Automobile
Authors Abstract
Content
Aim of this work is to present and discuss the possibility and the limits of two zone models for spark-ignition engines using a detailed kinetic scheme for the characterization of the evolution of the air-fuel mixture, while an equilibrium approach is used for the burnt zone. Simple experimental measurements of knocking tendency of different fuels in ideal reactors, such as rapid compression machines and shock tube reactors, cannot be directly used for the analysis of octane numbers and sensitivity of hydrocarbon mixtures. Thus a careful investigation is very useful, not only of the combustion chamber behavior, including the modelling of the turbulent flame front propagation, but also of the fluid dynamic behavior of the intake and exhaust system, accounting for the volumetric efficiency of the engine.
Research and Motor Octane Numbers are evaluated by numerical simulations based on a quasi-dimensional, two-zone combustion model embedded in a 1D thermo-fluid dynamic code, in which detailed kinetic schemes in the unburnt mixture has been introduced. Finally the effects of different mixture components are discussed on the basis of preliminary comparisons with experimental data.
Meta TagsDetails
DOI
https://doi.org/10.4271/2005-24-077
Pages
10
Citation
Mehl, M., Faravelli, T., Ranzi, E., Giavazzi, F. et al., "Kinetic Modelling Study of Octane Number and Sensitivity of Hydrocarbon Mixtures in CFR Engines," SAE Technical Paper 2005-24-077, 2005, https://doi.org/10.4271/2005-24-077.
Additional Details
Publisher
Published
Sep 11, 2005
Product Code
2005-24-077
Content Type
Technical Paper
Language
English