Browse Publications Technical Papers 2000-01-1892
2000-06-19

A Study on Ignition Delay of Diesel Fuel Spray via Numerical Simulation 2000-01-1892

To investigate the ignition process in a diesel spray, the ignition in a transient fuel spray is analyzed numerically by a discrete droplet spray model (DDM) coupled with the Shell kinetics model at various operating conditions. Predicted results show that the fuel mixture injected at the start of injection, which travels along midway between the spray axis and the spray periphery, contributes heavily to the first ignition in a spray. The equivalence ratio and temperature of the first ignited mixture are kept nearly constant until the start of hot ignition. The temperature of the first ignited mixture is kept at a constant value of higher temperature than the thermodynamic equilibrium temperature of the mixture before the hot ignition starts. The equivalence ratio of the first ignited mixture is around 1.6 at initial gas temperatures between 750 K and 850 K. When the initial gas temperature increases from 850 K to 1000 K, this equivalence ratio increases up to 2.5 through the effect of negative temperature coefficient region (NTC).

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

Evaluation of Time-Resolved Nano-Particle and THC Emissions of Wall-Guided GDI Engine

2011-28-0022

View Details

TECHNICAL PAPER

Exhaust Emission from Passenger Cars During Engine Cold Start and Warm-Up

970740

View Details

TECHNICAL PAPER

Diesel Fuel Cleanliness at Filter Outlet in Vehicle Real Life Conditions

2013-01-1696

View Details

X