Environmental Engineering Reference
In-Depth Information
Fig. 18 Effect of fuel
composition on CO emissions
in glycerol flames
Fig. 19 Effect of fuel
composition on NO
X
emissions in glycerol
fl
ames
OH* chemiluminescence images were acquired to reveal that the reaction zone
lengthens as the glycerol content in the
flame is increased. For 75/25 case, the
reaction zone encompassed the entire length of the combustor, demonstrating the
dif
fl
culty of providing suf
cient thermal feedback to vaporize glycerin droplets in
high glycerol content
flames. For 100 % glycerol case, the combustion process
exhibited greater instabilities with occasional
fl
flame blow-off resulting from inad-
equate thermal feedback. Combustion is expected to improve by increasing the
swirl number of the incoming combustion air, thereby increasing heat recirculation
from the
fl
fl
ame.
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