
395Soot Formation in Oxygen-Enhanced Combustion
behavior in opposed-ow ames and co-ow ames,
specically f
v
increased in both ame types.
Soot volume fraction proles obtained for methane/50%
O
2
+ 50% N
2
seeded with 0.4 C% of C
12
H
10
(acenaphthene)
and with 3.7 C% of C
2
H
2
(acetylene) are shown in Table
15.2. It is interesting to note that the f
v
peaks for these two
ames have almost the same value.
The shapes of the soot proles for these ames also
appear to be very similar, showing that both compounds
effectively promote the soot growth in the same spatial
areas of the ame. It also provides indirect evidence that
the studied additives ap