1998-10-19

An Experimental Study on Droplet Size Characteristics and Air Entrainment of Elliptic Sprays 982546

A series of experimental studies has been conducted to make clear the characteristics of a new type of diesel sprays, which are injected from an elliptic nozzle. The spray counter has been visualized by Laser induced fluorescence method. An instrument based on the Laser Diffraction principle was used to detect the droplet size of the sprays and a LDV system was used to measure the air entrainment. The fuel was provided from an accumulator pressurized with nitrogen. Four elliptic nozzles with different aspect ratio of the hole from 1.43 to 4.5 were tested. The equivalent diameter of the hole was about 0.33 to 0.36 mm. The injection pressure was 10 MPa. For comparison, a circular spray was also measured. The results show that the spray angle of elliptic sprays is much larger than that of the circular spray while the SMD of elliptic sprays is smaller than that of the circular spray at same experimental condition. Differences of air entrainment between the elliptic and circular spray in a dimensionless distance range of 100 to 200 were not observed.

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

Droplets Size and Velocity in a GDI Spray by PDA and Laser Light Extinction Techniques

2001-24-0047

View Details

TECHNICAL PAPER

Empirical Equations for the Sauter Mean Diameter of a Diesel Spray

890464

View Details

JOURNAL ARTICLE

Effects of Nozzle Geometry on the Characteristics of an Evaporating Diesel Spray

2016-01-2197

View Details

X