Browse Publications Technical Papers 2001-01-1939
2001-05-07

Effect of Nozzle Diameter and EGR Ratio on the Flame Temperature and Soot Formation for Various Fuels 2001-01-1939

In this study, effects of nozzle hole diameter and EGR ratio on flame temperature (indication of NO formation) and KL value (indication of soot formation) were investigated. Combustion of a single diesel fuel spray in the cylinder of a rapid compression machine (RCM) was analyzed. Three nozzles with different hole diameter were used corresponding to present, near term and long term heavy duty diesel engine specifications. EGR was simulated through 2%vol. CO2 addition to the inlet air and by increase of in-cylinder surrounding gas temperature. Various types of fuels were used in this. The ignition and combustion processes of diesel fuel spray were observed by a high-speed direct photography and by indicated pressure diagrams. Flame temperature and KL factor were analyzed by a two-color method. With larger nozzle hole diameters there are larger high temperature areas. With smaller nozzle hole diameters there is more soot formed. Introduction of 2% vol. CO2 to the inlet air does not influence NO, neither soot formations. With higher in-cylinder surrounding gas temperatures there are higher flame temperatures throughout combustion process.

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

Investigation of the Combustion Characteristics of GTL Diesel Fuel in a Constant Volume Combustion Chamber

2007-01-0031

View Details

TECHNICAL PAPER

Characterization of Diesel Particulate Emissions in Heavy-Duty DI-Diesel Engines with Common Rail Fuel Injection Influence of Injection Parameters and Fuel Composition

2001-01-3573

View Details

JOURNAL ARTICLE

Ignition and Combustion Characteristics of Wall-Impinging Sprays Injected by Group-Hole Nozzles for Direct-Injection Diesel Engines

2008-01-2469

View Details

X