New approaches to the modelling of multi-component fuel droplet heating and evaporation

6th International Workshop on Multi-Rate Processes and Hysteresis

Sazhin, Sergei S.^1 ; Elwardany, Ahmed E.^1,2 ; Heikal, Morgan R.^1,3

Sir Harry Ricardo Laboratories, Centre for Automotive Engineering, School of Computing, Engineering and Mathematics, Faculty of Science and Engineering, University of Brighton, Brighton

BN2 4GJ, United Kingdom^1

King Abdullah University of Science and Technology 4700, Thuwal

23955-6900, Saudi Arabia^2

Current Address: Department of Mechanical Engineering, Universiti of Teknologies PETRONAS, Bandar Sri Iskandar, Tronoh, Perak Darul Ridzuan

31750, Malaysia^3

关键词: Discrete modeling;    Droplet heating and evaporations;    Effective thermal conductivity;    Effects of temperature;    Hydrocarbon fuel;    Model-based OPC;    Multicomponent fuel;    Multicomponents;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/585/1/012014/pdf
DOI  :  10.1088/1742-6596/585/1/012014

来源: IOP

【 摘 要 】

The previously suggested quasi-discrete model for heating and evaporation of complex multi-component hydrocarbon fuel droplets is described. The dependence of density, viscosity, heat capacity and thermal conductivity of liquid components on carbon numbers n and temperatures is taken into account. The effects of temperature gradient and quasi-component diffusion inside droplets are taken into account. The analysis is based on the Effective Thermal Conductivity/Effective Diffusivity (ETC/ED) model. This model is applied to the analysis of Diesel and gasoline fuel droplet heating and evaporation. The components with relatively close n are replaced by quasi-components with properties calculated as average properties of the a priori defined groups of actual components. Thus the analysis of the heating and evaporation of droplets consisting of many components is replaced with the analysis of the heating and evaporation of droplets consisting of relatively few quasi-components. It is demonstrated that for Diesel and gasoline fuel droplets the predictions of the model based on five quasi-components are almost indistinguishable from the predictions of the model based on twenty quasi-components for Diesel fuel droplets and are very close to the predictions of the model based on thirteen quasi-components for gasoline fuel droplets. It is recommended that in the cases of both Diesel and gasoline spray combustion modelling, the analysis of droplet heating and evaporation is based on as little as five quasi-components.