Browse Publications Technical Papers 920108
1992-02-01

A Study of the Autoignition Process of a Diesel Spray via High Speed Visualization 920108

In this paper we present photographic and pressure data that describe the autoignition and combustion processes of transient fuel sprays under diesel-like conditions. The results were obtained in a constant-volume vessel that allowed complete optical access to the diesel spray ignition/combustion process. The combination of complete optical access and schlieren/luminosity visualization presents a unique view of the spray. From the data, a narrative of the features of diesel spray autoignition and combustion is constructed. Comparison of events at different gas-phase temperatures shows the effect of shifting the chemical induction time relative to the fluid mechanic transport time.
The data show that a key feature of the autoignition process is the formation and shedding of fuel eddies along the edges of the spray jet. These eddies provide an environment conducive to chemical reaction, without the disruptive effects of the spray core fluid mechanics. We speculate, based on our observations, that it is within these eddies that the initial sites of autoignition occur.

SAE MOBILUS

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

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 17% 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

A Study of the Homogeneous Charge Compression Ignition Combustion Process by Chemiluminescence Imaging

1999-01-3680

View Details

TECHNICAL PAPER

Validation of a Fractal Combustion Model through Flame Imaging

2005-01-1120

View Details

TECHNICAL PAPER

Simultaneous Droplet Velocity and Size Measurements in Fuel Sprays

912399

View Details

X