Modeling the Fuel/Air Mixing to Control the Pressure Pulsations and NOx Emissions in a Lean Premixed Combustor

  • Arnaud Lacarelle
  • Jonas P. Moeck
  • Christian O. Paschereit
  • Gregor Gelbert
  • Rudibert King
  • Dirk M. Luchtenburg
  • Bernd R. Noack
  • Jens Kasten
  • Hans-Christian Hege
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 108)

Abstract

This paper presents an overviewof the methodology developed to predict, control and optimize the NOx emissions and stability of lean premixed combustors. Investigations are performed firstly in cold flow and are validated with reacting flow measurements. A new cold flow mixing model describes the relevant characteristics of the fuel/airmixing, i.e. themixing quality and convective time delays, for different operating points of the system.Measurements in the combustor are performed to correct the flame position effect or calibrate the cold flowresults.The model is for the first time implemented in an extremum seeking controller to optimize the emissions and pressure pulsations of the combustor by adjusting the fuel mixing profile. A further increase of the fuel/air mixing, necessary for further NOx reductions, with pulsating fuel injection, is demonstrated. At the end, the developed adaptive control strategies demonstrate opportunities for future efficiency increases in industrial combustors.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Arnaud Lacarelle
    • 1
  • Jonas P. Moeck
    • 1
  • Christian O. Paschereit
    • 1
  • Gregor Gelbert
    • 2
  • Rudibert King
    • 2
  • Dirk M. Luchtenburg
    • 1
  • Bernd R. Noack
    • 3
  • Jens Kasten
    • 4
  • Hans-Christian Hege
    • 4
  1. 1.Institut für Strömungsmechanik und Technische AkustikTechnische UniversitätBerlinGermany
  2. 2.Institut für Prozess- und VerfahrenstechnikTechnische UniversitätBerlinGermany
  3. 3.Institut PprimeCNRS - Université de Poitiers - ENSMA, UPR 3346, POITIERSFrance
  4. 4.Konrad-Zuse InstitutBerlinGermany

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