A model FLOX® combustor, featuring a single high momentum premixed jet flame, has been investigated using laser diagnostics in an optically accessible combustion chamber at a pressure of 8 bar. The model combustor was designed as a large single eccentric nozzle main burner (Ø 40 mm) together with an adjoining pilot burner and was operated with natural gas. To gain insight into the flame stabilization mechanisms with and without piloting, simultaneous particle image velocimetry (PIV) and OH laser-induced fluorescence (LIF) measurements have been performed at numerous two-dimensional (2D) sections of the flame. Additional OH-LIF measurements without PIV particles were analyzed quantitatively resulting in absolute OH concentrations and temperature fields. The flow field looks rather similar for both the unpiloted and the piloted cases, featuring a large recirculation zone next to the high momentum jet. However, flame shape and position change drastically. For the unpiloted case, the flame is lifted and widely distributed. Isolated flame kernels are found at the flame root in the vicinity of small-scale vortices. For the piloted flame, on the other hand, both pilot and main flame are attached to the burner base plate, and flame stabilization seems to take place on much smaller spatial scales with a connected flame front and no isolated flame kernels. The single-shot analysis gives rise to the assumption that for the unpiloted case, small-scale vortices act like the pilot burner flow in the opposed case and constantly impinge and ignite the high momentum jet at its root.
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April 2018
Research-Article
High Momentum Jet Flames at Elevated Pressure: Detailed Investigation of Flame Stabilization With Simultaneous Particle Image Velocimetry and OH-LIF
Michael Severin,
Michael Severin
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
e-mail: michael.severin@dlr.de
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
e-mail: michael.severin@dlr.de
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Oliver Lammel,
Oliver Lammel
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
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Holger Ax,
Holger Ax
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
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Rainer Lückerath,
Rainer Lückerath
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
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Wolfgang Meier,
Wolfgang Meier
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
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Manfred Aigner,
Manfred Aigner
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
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Johannes Heinze
Johannes Heinze
German Aerospace Center (DLR),
Institute of Propulsion Technology,
Linder Höhe,
Köln D-51147, Germany
Institute of Propulsion Technology,
Linder Höhe,
Köln D-51147, Germany
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Michael Severin
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
e-mail: michael.severin@dlr.de
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
e-mail: michael.severin@dlr.de
Oliver Lammel
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Holger Ax
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Rainer Lückerath
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Wolfgang Meier
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Manfred Aigner
German Aerospace Center (DLR),
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Institute of Combustion Technology,
Pfaffenwaldring 38-40,
Stuttgart D-70569, Germany
Johannes Heinze
German Aerospace Center (DLR),
Institute of Propulsion Technology,
Linder Höhe,
Köln D-51147, Germany
Institute of Propulsion Technology,
Linder Höhe,
Köln D-51147, Germany
1Corresponding author.
Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received July 20, 2017; final manuscript received August 8, 2017; published online November 7, 2017. Editor: David Wisler.
J. Eng. Gas Turbines Power. Apr 2018, 140(4): 041508 (10 pages)
Published Online: November 7, 2017
Article history
Received:
July 20, 2017
Revised:
August 8, 2017
Citation
Severin, M., Lammel, O., Ax, H., Lückerath, R., Meier, W., Aigner, M., and Heinze, J. (November 7, 2017). "High Momentum Jet Flames at Elevated Pressure: Detailed Investigation of Flame Stabilization With Simultaneous Particle Image Velocimetry and OH-LIF." ASME. J. Eng. Gas Turbines Power. April 2018; 140(4): 041508. https://doi.org/10.1115/1.4038126
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