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Investigation of Soot Formation and Oxidation in a High-Pressure Gas Turbine Model Combustor by Laser Techniques

[+] Author Affiliations
Oliver Lammel, Klaus Peter Geigle, Rainer Lückerath, Wolfgang Meier, Manfred Aigner

DLR – German Aerospace Center, Stuttgart, Germany

Paper No. GT2007-27902, pp. 703-710; 8 pages
  • ASME Turbo Expo 2007: Power for Land, Sea, and Air
  • Volume 2: Turbo Expo 2007
  • Montreal, Canada, May 14–17, 2007
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4791-8 | eISBN: 0-7918-3796-3
  • Copyright © 2007 by ASME


Swirl-stabilized, non-premixed C2 H4 /air flames were investigated at pressures up to 9 bar in order to contribute to a better understanding of soot formation and oxidation under gas turbine like conditions. The flames had a thermal power of up to 45 kW and were confined by a squared combustion chamber with quartz windows. Secondary air could be injected into the post-flame zone to study the influence of cooling air on the oxidation of soot. The good optical access to the flame enabled the application of optical and laser measuring techniques. Temperatures were measured by coherent anti-Stokes Raman scattering (CARS) and soot concentrations by 2D laser induced incandescence (LII). The influence of the flow field characteristics, known from previous measurements in similar configurations, on the soot distributions is discussed. Furthermore, the effects of pressure, equivalence ratio and secondary oxidation air on the instantaneous and mean soot distributions were studied. All measurements were performed under well-defined and documented conditions, so that the data sets are suitable for the validation of numerical simulations.

Copyright © 2007 by ASME



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