1997-10-01

Modeling of Multicomponent Fuels Using Continuous Distributions with Application to Droplet Evaporation and Sprays 972882

In multidimensional modeling, fuels have been represented predominantly by single components, such as octane for gasoline. Several bicomponent studies have been performed, but these are still limited in their ability to represent real fuels, which are blends of as many as 300 components. This study outlines a method by which the fuel composition is represented by a distribution function of the fuel molecular weight. This allows a much wider range of compositions to be modeled, and only requires including two additional “species” besides the fuel, namely the mean and second moment of the distribution. This approach has been previously presented but is applied here to multidimensional calculations. Results are presented for single component droplet vaporization for comparison with single component fuel predictions, as well as results for a multicomponent gasoline and a diesel droplet. The latter illustrate the important differences between the vaporization characteristics of a multicomponent droplet compared to a single component droplet. The present approach was also applied to a gasoline hollow cone spray, illustrating not only the prediction of fuel vapor locations, but also of fuel composition variations within the spray. This, combined with knowledge of the local equivalence ratio, may be important in determining spark plug locations, unburned hydrocarbon emissions, and flame and wall quenching processes in direct injection engines.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Air/Fuel Distribution Simulation in a Port Injected Gasoline Lean-burn Engine

2001-01-1230

View Details

TECHNICAL PAPER

3D analysis of vapor and liquid phase of GDI injectors using laser induced exciplex fluorescence tomography in a high pressure/high temperature spray chamber

2007-01-1827

View Details

JOURNAL ARTICLE

Large-Eddy Simulation of Turbulent Dispersion Effects in Direct Injection Diesel and Gasoline Sprays

2019-01-0285

View Details

X