Environmental Engineering Reference
In-Depth Information
18
Q 2 (9)
284.347
Q 1 (10)
284.413
16
P 1 (6)
284.54
14
12
P 2 (5)
284.558
10
P 2 (4)
284.151
8
6
4
R 2 (17)
284.231
R 1 (18)
284.514
2
0
284.1
284.15 284.2 284.25 284.3
284.35 284.4
284.45 284.5
284.55
284.6
Isotope shift
of OH and OD
Laser wavelength [nm]
OH (1,0) band excitation spectra near 284.4 nm
12
Q 1 (10)
289.016
10
P 1 (6), Q 2 (8)
289.139
Q 2 (6), P 2 (1)
288.908
8
R 1
R 1 (20), Q 1 (11)
289.241
P 1 (5)
288.85
6
Q 2 (9)
289.296
R 1 (19)
288.956
P 2 (3)
289.177
4
P 2 (2)
289.027
2
0
288.8 288.85 288.9 288.95 289
289.05 289.1
289.15 289.2 289.25
289.3
289.35
Laser wavelength [nm]
OD (1,0) band excitation spectra near 289.1 nm
Fig. 9 Isotope shift between OH and OD lines for LIF excitation
molecular diffusion is higher due to the light mass of hydrogen. Swirling is required
also for diffusion
fl
flames of hydrogen.
3.1.2 Pro
ling of Redox Environment in Combustion Flame by PLIF
with Chemical Seeding (Itoh et al. 2006 )
It is an important issue to determine whether the
flame has a reducing or oxidizing
(redox) environment in the material processing (the processing of steel, other
metals, and ceramics). The material surface is greatly affected by the combustion
atmosphere. Furthermore the atmosphere in
fl
fl
flames is not uniform and often con-
tains spatial distributions in practical
ames.
To analyze the redox environment, the
fl
flame is estimated by measuring spatial
PLIF distributions of Fe and FeO: FeO + Red.
fl
Fe + O + Ox.
Higher Fe concentration (LIF intensity) re
fl
ects
reductive
.
 
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