Browse Publications Technical Papers 2009-01-0306
2009-04-20

Development, Implementation, and Validation of a Fuel Impingement Model for Direct Injected Fuels with High Enthalpy of Vaporization 2009-01-0306

Due to their superior enthalpy of vaporization, the charge cooling benefits of oxygenated fuels have been widely reported in the literature. Spark Ignition Direct Injection (SIDI) engines have the opportunity to maximize this charge cooling effect by controlling the phasing of the in-cylinder fuel vaporization, thus increasing charge density and suppressing auto ignition. Existing fuel vaporization models often over-predicted this charge cooling effect for SIDI applications when heat transfer effects related to impingement of the liquid fuel on combustion chamber surfaces are not considered.
The present subject describes the development, implementation, and validation of an analytical model that attempts to predict the volumetric efficiency gains and heat transfer reduction of a flex-fuel SIDI engine by considering impingement of the fuel spray on the combustion chamber surfaces. The model incorporates combustion chamber geometry, spray geometry, temporal fuel vaporization, surface impingement deposition, and the conductive heat transfer interaction of the fuel with the engine components.
The model was integrated as a sub-module into a commercially available 1-dimensional (1D) engine simulation code to predict the overall performance of the engine system, and was correlated with empirical engine data over a range of engine operating conditions. This comparison indicated excellent agreement in both absolute magnitude and trends at low engine speeds but required additional content to accurately comprehend fuel/air interactions at elevated engine speeds.

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

Dynamic Measurement of Heat Flux through the Cylinder Wall of a Modern HSDI Engine Over a New European Drive Cycle

2010-01-0322

View Details

TECHNICAL PAPER

Temperature Measurements of the Piston Optical Window in a Research Compression Ignition Engine to Set-Up a 1d Model of Heat Transfer in Transient Conditions

2019-24-0182

View Details

TECHNICAL PAPER

Regressed Relations for Forced Convection Heat Transfer in a Direct Injection Stratified Charge Rotary Engine

880626

View Details

X