Browse Publications Technical Papers 2000-05-0062

Modeling the effect of an in-line Pump-Based Fuel Injection System Characteristics for Small Industrial DI Diesel Engines on Spray Development 2000-05-0062

Optimization of geometric and operating parameters controlling the fuel injection rate of in-line pump-based fuel injection system for small-sized industrial DI diesel engines can be obtained using computer models simulating simultaneously the flow inside the fuel injection system and the subsequent spray development. Empirical sub-models accounting for the effect of injection hole cavitation both on hole exit velocity and on the atomization of the injected liquid have been included in order to enhance model predictions. Validation of the FIE model s performed by comparing model predictions against experimental data for the pumping chamber pressure, delivery valve lift, line pressure, needle lift and injection rate for various pump designs and for a wide range of pump operating conditions. The results confirm that the FIE simulation model is capable of predicting the flow characteristics inside the fuel injection system for all cases investigated. Parametric studies investigating the influence of nozzle specifications on hole flow exit characteristics are then performed and used as initial conditions to the CFD spray model which predicts the subsequent detailed spray droplet characteristics taking into account the liquid core atomization, droplet secondary break-up, droplet collisions, droplet drag coefficient and droplet turbulent dispersion processes. The results have revealed the important influence of the design of various geometric parameters of the fuel injection system on the spray structure.


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


Members save up to 16% 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:

Structure of Sprays from an Air-Assist Hollow-Cone Injector


View Details


Quasi-1D Analysis of n-Dodecane Split Injection Process


View Details


Modeling Fuel-Air Mixing, Combustion and Soot Formation with Ducted Fuel Injection Using Tabulated Kinetics


View Details