An experimental analysis of confined premixed turbulent methane/air and hydrogen/air jet flames is presented. A generic lab scale burner for high-velocity preheated jets equipped with an optical combustion chamber was designed and set up. The size and operating conditions were configured to enable flame stabilization by recirculation of hot combustion products. The geometry of the rectangular confinement and an off-center positioning of the jet nozzle were chosen to resemble one burner nozzle of a FLOX®-based combustor. The off-center jet arrangement caused the formation of a pronounced lateral recirculation zone similar to the one in previously investigated FLOX®-combustors (Lückerath et al., 2007. “FLOX® Combustion at High Pressure with Different Fuel Compositions,” ASME J. Eng. Gas Turbines Power, 130(1), pp. 011505; Lammel et al., 2010. “FLOX® Combustion at High Power Density and High Flame Temperatures,” ASME J. Eng. Gas Turbines Power, 132(12), p. 121503ff). The analysis was accomplished by different laser measurement techniques. Flame structures were visualized by OH* chemiluminescence imaging and planar laser-induced fluorescence of the OH radical. Laser Raman scattering was used to determine concentrations of the major species and the temperature. Velocity fields were measured with particle image velocimetry. Results of measurements in two confined jet flames are shown. The mixing of fresh gas with recirculating combustion products and the stabilization of the methane flame are discussed in detail. The presented findings deliver important information for the understanding of confined jet flames operated with different fuels. The obtained data sets can be used for the validation of numerical simulations as well.
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April 2012
Research Papers
Experimental Analysis of Confined Jet Flames by Laser Measurement Techniques
Oliver Lammel,
e-mail: oliver.lammel@dlr.de
Oliver Lammel
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Michael Stöhr,
Michael Stöhr
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Peter Kutne,
Peter Kutne
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Claudiu Dem,
Claudiu Dem
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Wolfgang Meier,
Wolfgang Meier
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Manfred Aigner
Manfred Aigner
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
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Oliver Lammel
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
e-mail: oliver.lammel@dlr.de
Michael Stöhr
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
Peter Kutne
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
Claudiu Dem
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
Wolfgang Meier
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
Manfred Aigner
German Aerospace Center (DLR), Institute of Combustion Technology
, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany
J. Eng. Gas Turbines Power. Apr 2012, 134(4): 041506 (9 pages)
Published Online: February 1, 2012
Article history
Received:
June 20, 2011
Accepted:
June 21, 2011
Online:
February 1, 2012
Published:
February 1, 2012
Citation
Lammel, O., Stöhr, M., Kutne, P., Dem, C., Meier, W., and Aigner, M. (February 1, 2012). "Experimental Analysis of Confined Jet Flames by Laser Measurement Techniques." ASME. J. Eng. Gas Turbines Power. April 2012; 134(4): 041506. https://doi.org/10.1115/1.4004733
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