Chemiluminescence continues to be of interest as a cost-effective optical diagnostic for gas turbine combustor health monitoring. However, most chemical kinetics mechanisms of the chemiluminescence of target species such as OH*, CH*, and CO2* were developed from atmospheric-pressure data. The present paper presents a study wherein the ability of current kinetics models to predict the chemiluminescence trends at engine pressures was assessed. Shock-tube experiments were performed in highly diluted mixtures of H2/O2/Ar at a wide range of pressures to evaluate the ability of a current kinetics model to predict the measured trends. At elevated pressures up to 15 atm, the currently used reaction rate of H + O + M = OH* + M (i.e., without any pressure dependence) significantly over predicts the amount of OH* formed. Other important chemiluminescence species include CH* and CO2*, and separate experiments were performed to assess the validity of existing chemical kinetics mechanisms for both of these species at elevated pressures. A pressure excursion using methane-oxygen mixtures highly diluted in argon was performed up to about 15 atm, and the time histories of CH* and CO2* were measured over a range of temperatures from about 1700 to 2300 K. It was found that the existing CH* mechanism captured the T and P trends rather well, but the CO2* mechanism did a poor job of capturing both the temperature and pressure behavior. With respect to the modeling of collider species, it was found that the current OH* model performs well for N2, but some improvements can be made for CO2.

References

References
1.
Schuermans
,
B.
,
Guethe
,
F.
,
Pennell
,
D.
,
Guyot
,
D.
, and
Paschereit
,
O. C.
, 2010, “
Thermoacoustic Modeling of a Gas Turbine Using Transfer Functions Measured Under Full Engine Pressure
,”
ASME J. Eng. Gas Turbines Power
,
132
,
p.
111503
.
2.
Donato
,
N. S.
, 2009, “
OH* Chemiluminescence: Pressure Dependence of H+O+M = OH*+M
,”
M.S. Thesis
,
Texas A&M University.
3.
Aul
,
C. J.
, 2009, “
An Experimental Study into the Ignition of Methane and Ethane Blends in a New Shock-Tube Facility
,”
M.S. Thesis
,
Texas A&M University.
4.
Petersen
,
E. L.
Kalitan
,
D. M.
, and
Rickard
,
M. J. A.
, 2003, “
Calibration and Chemical Kinetics Modeling of an OH Chemiluminescence Diagnostic
,”
AIAA paper 2003-4493.
5.
Hall
,
J. M.
, and
Petersen
,
E. L.
, 2006, “
An Optimized Kinetics Model for OH Chemiluminescence at High Temperatures and Atmospheric Pressures
,”
Int. J. Chem. Kinet.
38
, pp.
714
724
.
6.
Kee
,
R. J.
,
Rupley
,
F. M.
,
Miller
,
J. A.
,
Coltrin
,
M. E.
,
Grcar
,
J. F.
,
Meeks
,
E.
Moffat
,
H. K.
,
Lutz
,
A. E.
,
Dixon-Lewis
,
G.
,
Smooke
,
M. D.
,
Warnatz
,
J.
Evans
,
G. H.
,
Larson
,
R. S.
,
Mitchell
,
R. E.
,
Petzold
,
L. R.
,
Reynolds
,
W. C.
,
Caracotsios
,
M.
,
Stewart
,
W. E.
,
Glarborg
,
P.
,
Wang
,
C.
, and
Adigun
,
O.
, 2000,
Chemkin Collection, Release 3.6, Reaction Design
,
San Diego, CA.
7.
Mancaruso
,
E.
, and
Vaglieco
,
B. M.
, 2011, “
Spectroscopic Measurements of Premixed Combustion in Diesel Engine
,”
Fuel
,
90
, pp.
511
520
.
8.
Slack
,
M.
, and
Grillo
,
A.
, 1985, “
High Temperature Rate Coefficient Measurements of CO+O Chemiluminescence
,”
Combustion Flame
,
59
, pp.
189
196
.
9.
Nori
,
V.
, and
Seitzman
,
J.
, 2008, “
Evaluation of Chemiluminescence as a Combustion Diagnostic Under Varying Operating Conditions
,”
AIAA Paper 2008-0953.
10.
de Vries
,
J.
,
Hall
,
J. M.
,
Simmons
,
S. L.
,
Rickard
,
M. J. A.
,
Kalitan
,
D. M.
, and
Petersen
,
E. L.
, 2007, “
Ethane Ignition and Oxidation behind Reflected Shock Waves
,”
Combustion Flame
,
150
, pp.
137
150
.
11.
Petersen
,
E. L.
, and
Hanson
,
R. K.
, 2006, “
Measurements of Reflected-Shock Bifurcation Over a Wide Range of Gas Composition and Pressure
,”
Shock Waves
,
15
, pp.
333
340
.
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