Browse Publications Technical Papers 2006-01-3333
2006-10-16

A Numerical and Experimental Study of Diesel Fuel Sprays Impinging on a Temperature Controlled Wall 2006-01-3333

Both spray-wall and spray-spray interactions in direct injection diesel engines have been found to influence the rate of heat release and the formation of emissions. Simulations of these phenomena for diesel sprays need to be validated, and an issue is investigating what kind of fuels can be used in both experiments and spray calculations. The objective of this work is to compare numerical simulations with experimental data of sprays impinging on a temperature controlled wall with respect to spray characteristics and heat transfer.
The numerical simulations were made using the STAR-CD and KIVA-3V codes. The CFD simulations accounted for the actual spray chamber geometry and operating conditions used in the experiments. Particular attention was paid to the fuel used for the simulations. Firstly, a single-component model fuel (n-heptane) was used; subsequently a 2-component model fuel (Idea, 70% n-decane and 30 % α-methylnaphthalene) was implemented in the code fuel libraries in order to account for the fuel used in the experiments. Finally, different break-up and wall impingement models were analyzed.
The experiments were performed in the high pressure, high temperature spray rig at Chalmers with conditions corresponding to those found during the compression stroke in a heavy duty diesel engine. The temperature controlled wall was equipped with three coaxial thermocouples for recording the surface temperature. The time histories of the surface temperatures were used to calculate the local heat fluxes applying a one-dimensional transient heat conduction model.
The spray characteristics were measured using two different optical methods: Phase Doppler Particle Anemometry and high speed imaging. Image analysis gave the characteristics of the general behavior of the axial and radial penetration. PDPA data gave the characteristics of droplet penetration before and after impingement of the wall.

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 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:
TECHNICAL PAPER

Detailed Kinetic Modeling and Laser Diagnostics of Soot Formation Process in Diesel Jet Flame

2004-01-1398

View Details

TECHNICAL PAPER

Group-Hole Nozzle Effects on Mixture Formation and In-cylinder Combustion Processes in Direct-Injection Diesel Engines

2007-01-4050

View Details

JOURNAL ARTICLE

Study of Air Entrainment of Multi-hole Diesel Injection by Particle Image Velocimetry - Effect of Neighboring Jets Interaction and Transient Behavior After End of Injection.

2010-01-0342

View Details

X