Browse Publications Technical Papers 2002-01-0837
2002-03-04

Examination of Iso-octane/Ketone Mixtures for Quantitative LIF Measurements in a DISI Engine 2002-01-0837

Mixtures of low concentrations of 3-pentanone in iso-octane are used widely in an attempt to obtain quantitative measurements of fuel equivalence ratio in direct-injection, spark-ignition engines. Despite similar boiling temperatures and heats of vaporization, 3-pentanone has been found to evaporate from the mixture more rapidly than the iso-octane. Thus, the signal detected by the planar laser-induced fluorescence (PLIF) diagnostic cannot accurately represent fuel distribution during spray evaporation and air-fuel mixing in an engine. Using an evaporation chamber, we demonstrate the non-steady PLIF signal of the iso-octane/3-pentanone mixture during steady evaporation. Significant improvement in the consistency of the PLIF signal during evaporation is achieved by adding a heavier ketone (3-hexanone) tracer to compensate for the early depletion of the 3-pentanone. Use of the modified fuel-tracer mixture is demonstrated during quantitative equivalence ratio measurements in an optically accessible DISI engine, and the result is compared to that obtained using the iso-octane/3-pentanone mixture.

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

Two-Dimensional Temperature Measurements in an SI Engine Using Two-Line Tracer LIF

982468

View Details

TECHNICAL PAPER

Measurement of Flame Temperature Distribution in Engines by Using a Two-Color High Speed Shutter TV Camera System

890320

View Details

TECHNICAL PAPER

Measurement of Temperature Distribution Nearby Flame Quenching Zone by Real-Time Holographic Interferometry

2004-01-1761

View Details

X