The effect of fuel composition on performance is evaluated on a model gas turbine combustor designed to mimic key features of practical devices. A flexible fuel injection system is utilized to control the placement of the fuel in the device to allow exploration and evaluation of fuel distribution effects in addition to chemistry effects. Gas blends reflecting the extremes in compositions found in the U.S. are considered. The results illustrate that, for the conditions and configuration studied, both fuel chemistry and fuel air mixing play a role in the performance of the device. While chemistry appears to be the predominant factor in stability, a role is noted in emissions performance as well. It is also found that changes in fuel distribution associated with changes in fuel momentum for fixed firing rate also have an impact on emissions. For the system considered, a strategy for sustaining optimal performance while fuel composition changes is illustrated.

Issue Section:
Gas Turbines: Combustion and Fuels
Keywords:
gas turbines, performance evaluation, fuel optimal control, combustion, emission, mixing, chemically reactive flow, swirling flow
Topics:
Combustion chambers, Fuels, Emissions, Gas turbines
1.
Meier
,
J. G.
,
Hung
,
W. S. Y.
, and
Sood
,
V. M.
,
1986
, “
Development and Application of Industrial Gas Turbines for Medium-BTU Gaseous Fuels
,”
ASME J. Eng. Gas Turbines Power
,
108
, pp.
182
–
190
.
2.
Liss, W. E., Thrasher, W. H., Steinmetz, G. F., Chowdiah, P., and Attari, A., 1992, “Variability of Natural Gas Composition in Select Major Metropolitan Areas of the United States,” GRI-92/0123 Mar.
3.
Nicol
,
D. G.
,
Steele
,
R. C.
,
Marinov
,
N. M.
, and
Malte
,
P. C.
,
1995
, “
The Importance of the Nitrous Oxide Pathway to NOx in Lean-Premixed Combustion
,”
ASME J. Eng. Gas Turbines Power
,
117
, pp.
100
–
111
.
4.
Steele
,
R. C.
,
Jarrett
,
A. C.
,
Malte
,
P. C.
,
Tonouchi
,
J. H.
, and
Nicol
,
D. G.
,
1997
, “
Variables Affecting NOx Formation in Lean-Premixed Combustion
,”
ASME J. Eng. Gas Turbines Power
,
119
, pp.
102
–
107
.
5.
Nguyen, O. M., and Samuelsen, G. S., 1999, “The Effect of Discrete Pilot Hydrogen Dopant Injection on the Lean Blowout Performance of a Model Gas Turbine Combustor,” ASME Paper No. 99-GT-359.
6.
Hoffmann
,
S.
,
Lenze
,
B.
, and
Eickoff
,
H.
,
1998
, “
Results of Experiments and Models for Predicting Stability Limits of Turbulent Swirling Flames
,”
ASME J. Eng. Gas Turbines Power
,
120
, pp.
311
–
316
.
7.
Beer, J. M., and Chigier, N. A., 1972, Combustion Aerodynamics, Robert E. Krieger Publishing Co., Malabar, FL.
8.
Kee, R. J., et al., 1999, Chemkin Collection, Release 3.5, Reaction Design, San Diego, CA.
Copyright © 2001
 by ASME
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