Spray Flame In a Vitiated Coflow

The hot, open environment provided by the vitiated coflow combustor can also be used to investigate spray flames. In the laboratory, droplet size distributions, global emissions, as well as flame characteristics can be studied. To date, methanol and methanol-water spray flames have been studied. In the future we hope to investigate diesel and diesel mixture spray flames.

With the use of the EPCS (Ensemble Particle Concentration & Size) on loan from Malvern Instruments, Methanol spray flames were investigated. The droplet size distribution was measured at several vertical positions. Preliminary research results were presented at the 2000 Spring Meeting of the Western States Section of the Combustion Institute (Colorado School of Mines, Golden, CO on March 14, 2000). Ensemble Diffraction Measurements of Spray Combustion in a Novel Vitiated Coflow Turbulent Jet Flame Burner. WSS/CI 00S-47

The spray research expanded to the study of methanol-water mixture flames. For each mixture (MeOH, MeOH+20%H₂O, MeOH+40%H₂O) the height of the flame front was measured. The Malvern EPCS was again used to study the droplet size distributions within the spray. Emissions measurements are planned for the Fall of 2000.

 

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