The blowout limit of a methane jet diffusion flame is examined in the presence of a number of much smaller pilot jet flames of different fuels arranged within an experimental burner assembly in a co-flowing stream of air. It is shown that the blowout limit of the central jet flame can be extended very appreciably by increasing the flow rate through the smaller pilot jets. The basis for this extension to the blowout limit and the role of some changes in the operating parameters are discussed. It is suggested that the extension to the blowout limit observed is due mainly to the thermal contribution of the pilot jet flames.
Issue Section:
Technical Papers
1.
Broadwell, J. E., Dahm, W. J. A., and Mungal, M. G., 1984, “Blowout of Turbulent Diffusion Flames,” Proceedings of the Twentieth Symposium (International) on Combustion, The Combustion Institute, pp. 303–310.
2.
Byggstoyl, S., and Magnussen, B. F., 1983, “A Model for Flame Exitinction in Turbulent Flow,” Fourth Symposium on Turbulent Shear Flows, pp. 10.32–10.38.
3.
Dahm, W. J. A., and Dibble, R. W., 1988, “Co-Flowing Turbulent Jet Diffusion Flame Blowout,” Proceedings of the Twenty-Second Symposium (International) on Combustion, The Combustion Institute, pp. 801–807.
4.
Dahm
W. J. A.
Mayman
A. G.
1990
, “Blowout Limits of Turbulent Jet Diffusion Flames for Arbitrary Source Conditions
,” AIAA Journal
, Vol. 28
, No. 7
, p. 1157
1157
.5.
Eickhoff, H., Lenze, B., and Leuckel, W., 1984, “Experimental Investigation on the Stability Mechanism of Jet Diffusion Flames,” Proceedings of the Twentieth Symposium (International) on Combustion, The Combustion Institute, pp. 311–317.
6.
Kalghatgi
G. T.
1981
, “Blowout Stability of Gaseous Jet Diffusion Flames. Part 1: In Still Air
,” Combustion Science and Technology
, Vol. 26
, p. 233
233
.7.
Karbasi
M.
Wierzba
I.
1995
, “Prediction of the Blowout of Jet Diffusion Flames in a Co-Flowing Stream of Air
,”, Emerging Energy Technology
ASME PD-Vol. 66
, pp. 21
–27
.8.
Karim, G. A., Wierzba, I., Metwally, M., and Mohan, K., 1981, “The Combustion of a Fuel Jet in a Stream of Lean Gaseous Fuel-Air Mixtures,” 18th Symposium (International) on Combustion, The Combustion Institute, pp. 977–990.
9.
Karim
G. A.
Kibrya
M. G.
1986
, “Variations of the Lean Blowout Limits of a Homogeneous Methane-Air Stream in the Presence of Metallic Wire Mesh
,” ASME Journal of Engineering for Gas Turbines and Power
, Vol. 108
, pp. 446
–449
.10.
Kibrya, M. G., Karim, G. A., and Wierzba, I., 1988, “The Blowout of Turbulent Jet Flames in Co-Flowing Streams of Fuel-Air Mixtures,” Proceedings of the 33rd International Gas Turbine and Aeroengine Congress & Exposition, Amsterdam, The Netherlands, ASME Paper No. 88-GT-106.
11.
Lenze
B.
Milano
M. E.
Gunther
R.
1975
, “The Mutual Influence of Multiple Jet Diffusion Flames
,” Combustion Science and Technology
, Vol. 11
, p. 1
1
, 1975.12.
Li
C. P.
Wiesenhahn
D.
Penner
S. S.
1986
, “Multiple Diffusion Flames with Rectangular Symmetry
,” Combustion and Flame
, Vol. 65
, pp. 215
–225
.13.
Lockwood
F. C.
Megahed
I. E.
1978
, “Extinction in Turbulent Reacting Flows
,” Combustion Science Technology
, Vol. 19
, pp. 77
–80
.14.
Miake-Lye, R. C., and Hammer, J. A., 1988, “Lifted Turbulent Jet Flames: A Stability Criterion Based on the Jet Large-Scale Structure,” Proceedings of the Twenty-Second Symposium (International) on Combustion, The Combustion Institute, pp. 817–824.
15.
Peters
N.
Williams
F. A.
1983
, “Liftoff Characteristics of Turbulent Diffusion Flames
,” AIAA Journal
, Vol. 21
, No. 3
, p. 423
423
.16.
Pitts, W. M., 1991, “Reynolds Number Effects on the Mixing Behavior of Axisymmetric Turbulent Jets,” Experiments in Fluids, 11, p. 135.
17.
Savas
O.
Gollahalli
S. R.
1986
, “Flow Structure in Near-Nozzle Region of Gas Jet Flames
,” AIAA Journal
, Vol. 24
, p. 1137
1137
.18.
Takahashi, F., Mizomoto, M., Ikai, S., and Futaki, N., 1984, “Lifting Mechanism of Free Jet Diffusion Flames,” Proceedings of the Twentieth Symposium (International) on Combustion, The Combustion Institute, p. 295.
19.
Takahashi, F., and Schmoll, W. J., 1990, “Lifting Criteria of Jet Diffusion Flames,” Proceedings of the Twenty-Third Symposium (International) on Combustion, The Combustion Institute, p. 677.
20.
Takahashi, F., and Goss, L. P., 1992, “Near-Field Turbulent Structures and the Local Extinction of Jet Diffusion Flames,” Proceedings of the Twenty-Fourth Symposium (International) on Combustion, The Combustion Institute, p. 351.
21.
Wierzba
I.
Kar
K.
Karim
G. A.
1993
, “An Experimental Investigation of the Blowout Limits of a Jet Diffusion Flame in Co-Flowing Streams of Different Velocity and Composition
,” ASME JOURNAL OF ENERGY RESOURCES TECHNOLOGY
, Vol. 115
, p. 143
143
.22.
Wierzba
I.
Oladipo
A. B.
1994
, “Blowout of Jet Diffusion Flames in Co-Flowing Air Stream
,” ASME
PD-Vol. 57
, Emerging Energy Technology, pp. 29
–33
.23.
Williams, F. A., 1975, Turbulent Mixing in Non-Reactive and Reactive Flows, Plenum Press.
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