A multi-dimensional quasi-discrete model for the analysis of Diesel fuel droplet heating and evaporation

作者：Sazhin S S^*; Al Qubeissi M; Nasiri R; Gun' ko V M; Elwardany A E; Lemoine F; Grisch F; Heikal M R

来源：Fuel, 2014, 129: 238-266.

DOI：10.1016/j.fuel.2014.03.028

• Droplets
• Heating
• Evaporation
• Diesel fuel
• Multi-component fuel

A new multi-dimensional quasi-discrete model is suggested and tested for the analysis of heating and evaporation of Diesel fuel droplets. As in the original quasi-discrete model suggested earlier, the components of Diesel fuel with close thermodynamic and transport properties are grouped together to form quasi-components. In contrast to the original quasi-discrete model, the new model takes into account the contribution of not only alkanes, but also various other groups of hydrocarbons in Diesel fuels; quasi-components are formed within individual groups. Also, in contrast to the original quasi-discrete model, the contributions of individual components are not approximated by the distribution function of carbon numbers. The formation of quasi-components is based on taking into account the contributions of individual components without any approximations. Groups contributing small molar fractions to the composition of Diesel fuel (less than about 1.5%) are replaced with characteristic components. The actual Diesel fuel is simplified to form six groups: alkanes, cycloalkanes, bicycloalkanes, alkylbenzenes, indanes %26 tetralines, and naphthalenes, and 3 components C19H34 (tricycloalkane), C13H12 (diaromatic), and C14H10 (phenanthrene). It is shown that the approximation of Diesel fuel by 15 quasi-components and components, leads to errors in estimated temperatures and evaporation times in typical Diesel engine conditions not exceeding about 3.7% and 2.5% respectively, which is acceptable for most engineering applications.

• 出版日期2014-8-1