This paper presents experimental study on self-excited combustion instability characteristics of premixed low-swirl flames in a multinozzle can combustor with counterswirl and coswirl arrays. Experiments were carried out over a wide range of inlet velocity from 4 m/s to 15.5 m/s and equivalence ratio from 0.5 to 0.85. Phase-locked OH planar laser-induced fluorescence was employed to measure flame shape and identify heat release rate. Four operation regions: stable combustion region, unstable combustion region, flashback region, and extinguish region are observed for both array burners. The amplitude of pressure fluctuation for counterswirl arrangement is less than the coswirl array, and the stable operating window of the counterswirl array is wider. In the unstable combustion region, the counterswirl flame triggers the 2L mode of the combustion system, while the coswirl flame incites three longitudinal modes with the highest amplitude near 3L. Rayleigh index distribution reveals neighboring flame interaction results in thermoacoustic coupling for multinozzle flames. Additionally, for the counterswirl array, thermoacoustic couplings also exit in the flame base region and shear region while, for the coswirl array, the instability driving zones also locate at the lip region and the tail of center flame which is totally different with counterswirl flame.

References

References
1.
Huang
,
Y.
, and
Yang
,
V.
,
2009
, “
Dynamics and Stability of Lean-Premixed Swirl-Stabilized Combustion
,”
Prog. Energy Combust. Sci.
,
35
(
4
), pp.
293
364
.
2.
O'Connor
,
J.
,
Acharya
,
V.
, and
Lieuwen
,
T.
,
2015
, “
Transverse Combustion Instabilities: Acoustic, Fluid Mechanic, and Flame Processes
,”
Prog. Energy Combust. Sci.
,
49
(
1
), pp.
1
39
.
3.
Ducruix
,
S.
,
Schuller
,
T.
,
Durox
,
D.
, and
Candel
,
S.
,
2003
, “
Combustion Dynamics and Instabilities: Elementary Coupling and Driving Mechanisms
,”
J. Propul. Power
,
19
(
5
), pp.
722
734
.
4.
Temme
,
J. E.
,
Allison
,
P. M.
, and
Driscoll
,
J. F.
,
2014
, “
Combustion Instability of a Lean Premixed Prevaporized Gas Turbine Combustor Studied Using Phase-Averaged PIV
,”
Combust. Flame
,
161
(
4
), pp.
958
970
.
5.
Arndt
,
C. M.
,
Severin
,
M.
,
Dem
,
C.
,
Stöhr
,
M.
,
Steinberg
,
A. M.
, and
Meier
,
W.
,
2015
, “
Experimental Analysis of Thermo-Acoustic Instabilities in a Generic Gas Turbine Combustor by Phase-Correlated PIV, Chemiluminescence, and Laser Raman Scattering Measurements
,”
Exp. Fluids
,
56
(
69
), pp.
1
23
.
6.
Tachibana
,
S.
,
Saito
,
K.
,
Yamamoto
,
T.
,
Makidaa
,
M.
,
Kitanoc
,
T.
, and
Kurosec
,
R.
,
2015
, “
Experimental and Numerical Investigation of Thermo-Acoustic Instability in a Liquid-Fuel Aero-Engine Combustor at Elevated Pressure: Validity of Large-Eddy Simulation of Spray Combustion
,”
Combust. Flame
,
162
(
6
), pp.
2621
2637
.
7.
Boyce
,
M. P.
,
2012
,
Gas Turbine Engineering Handbook
,
4th ed.
,
Elsevier
, Waltham,
MA
, Chap. 10.
8.
Brandt
,
D. E.
, and
Wesorick
,
R. R.
,
1994
, “
GE Gas Turbine Design Philosophy
,” GE Power Systems, Schenectady, NY,
Report No. GER-3434D
.
9.
Fanaca
,
D.
,
Alemela
,
P. R.
,
Ettner
,
F.
,
Hirsch
,
C.
,
Sattelmayer
,
T.
, and
Schuermans
,
B.
,
2008
, “
Determination and Comparison of the Dynamic Characteristics of a Perfectly Premixed Flame in Both Single and Annular Combustion Chambers
,”
ASME
Paper No. GT2008-50781.
10.
Szedlmayer
,
M. T.
,
Quay
,
B. D.
,
Samarasinghe
,
J.
,
Rosa
,
A. D.
,
Lee
,
J. G.
, and
Santavicca
,
D. A.
,
2011
, “
Forced Flame Response of a Lean Premixed Multi-Nozzle Can Combustor
,”
ASME
Paper No. GT2011-46080.
11.
Liu
,
W. J.
,
Ge
,
B.
,
Tian
,
Y. S.
,
Yuan
,
Y. W.
,
Zang
,
S. S.
, and
Weng
,
S. L.
,
2015
, “
Experimental Investigations and Large Eddy Simulation of Low-Swirl Combustion in a Lean Premixed Multi-Nozzle Combustor
,”
Exp. Fluids
,
56
(
34
), pp.
1
12
.
12.
Cheng
,
R. K.
,
1995
, “
Velocity and Scalar Characteristics of Premixed Turbulent Flames Stabilized by Weak Swirl
,”
Combust. Flame
,
101
(
1–2
), pp.
1
14
.
13.
Kang
,
D. M.
,
Culick
,
F. E. C.
, and
Ratner
,
A.
,
2007
, “
Combustion Dynamics of a Low-Swirl Combustor
,”
Combust. Flame
,
151
(
3
), pp.
412
425
.
14.
Huang
,
Y.
, and
Ratner
,
A.
,
2009
, “
Experimental Investigation of Thermoacoustic Coupling for Low-Swirl Lean Premixed Flames
,”
J. Propul. Power
,
25
(
2
), pp.
365
373
.
15.
Yilmaz
,
İ.
,
Ratner
,
A.
,
Ilbas
,
M.
, and
Huang
,
Y.
,
2010
, “
Experimental Investigation of Thermoacoustic Coupling Using Blended Hydrogen–Methane Fuels in a Low Swirl Burner
,”
Int. J. Hydrogen Energy
,
35
(
1
), pp.
329
336
.
16.
Tachibana
,
S.
,
Kanai
,
K.
,
Yoshida
,
S.
,
Suzuki
,
K.
, and
Sato
,
T.
,
2015
, “
Combined Effect of Spatial and Temporal Variations of Equivalence Ratio on Combustion Instability in a Low-Swirl Combustor
,”
Proc. Combust. Inst.
,
35
(
3
), pp.
3299
3308
.
17.
Therkelsen
,
P. L.
,
Portillo
,
J. E.
,
Littlejohn
,
D.
,
Martin
,
S. M.
, and
Cheng
,
R. K.
,
2013
, “
Self-Induced Unstable Behaviors of CH4 and H2/CH4 Flames in a Model Combustor With a Low-Swirl Injector
,”
Combust. Flame
,
160
(
2
), pp.
307
321
.
18.
Davis
,
D. W.
,
Therkelsen
,
P. L.
,
Littlejohn
,
D.
, and
Cheng
,
R. K.
,
2013
, “
Effects of Hydrogen on the Thermo-Acoustics Coupling Mechanisms of Low-Swirl Injector Flames in a Model Gas Turbine Combustor
,”
Proc. Combust. Inst.
,
34
(
2
), pp.
3135
3143
.
19.
Doebelin
,
E. O.
,
1966
,
Measurement Systems: Application and Design
,
McGraw-Hill
, New York.
20.
Giezendanner
,
R.
,
Keck
,
O.
,
Weigand
,
P.
,
Meier
,
W.
,
Stricker
,
W.
, and
Aigner
,
M.
,
2003
, “
Periodic Combustion Instabilities in a Swirl Burner Studied by Phase-Locked Planar Laser-Induced Fluorescence
,”
Combust. Sci. Technol.
,
175
(
4
), pp.
721
741
.
21.
Grimes
,
R. G.
,
Lewis
,
J. G.
, and
Simon
,
H. D.
,
1994
, “
A Shifted Block Lanczos Algorithm for Solving Sparse Symmetric Generalized Eigenproblems
,”
SIAM J. Matrix Anal. Appl.
,
15
(
1
), pp.
228
272
.
22.
Lee
,
J. G.
,
Gonzalez
,
E.
, and
Santavicca
,
D. A.
,
2005
, “
On the Applicability of Chemiluminescence to the Estimation of Unsteady Heat-Release During Unstable Combustion in Lean Premixed Combustor
,”
AIAA
Paper No. 2005-3575.
23.
Shih
,
W. P.
,
Lee
,
J. G.
, and
Santavicca
,
D. A.
,
1996
, “
Stability and Emissions Characteristics of a Lean Premixed Gas Turbine Combustor
,”
Symp. (Int.) Combust.
,
26
(
2
), pp.
2771
2778
.
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