Frequency resolved interferometric detection of local density fluctuations in flames

Johannes Peterleithner, Florian Salcher, Jakob Woisetschläger*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

Low NOx strategies usually include lean combustion in order to reduce the flame temperature. Under certain conditions, this interaction can occur periodically as thermo-acoustic coupling, a reason why new premix combustion systems tend to have oscillations. Ongoing developments have pushed the sensitivity for density fluctuation measurements using laser vibrometers. In this experiment a variable geometry burner was enclosed in a liner, with the flame optically accessible through four fused silica windows. By this burner with adjustable flame conditions the cavity
of the atmospheric model combustion chamber was excitable at a frequency around 200Hz. Resonant and non-resonant flame conditions were investigated and compared by laser vibrometer interferometry, schlieren visualization and OH*/CH* chemiluminescence
Original languageEnglish
Title of host publicationProceedings 17th International Symposium on Application of Laser Techniques to Fluid Mechanics
Pages04.7_1_53-04.7_1_53
Number of pages18
Publication statusPublished - 2014
Event17th International Symposium on Application of Laser Techniques to Fluid Mechanics - Lisboa, Portugal
Duration: 7 Jul 201410 Jul 2014

Conference

Conference17th International Symposium on Application of Laser Techniques to Fluid Mechanics
Country/TerritoryPortugal
CityLisboa
Period7/07/1410/07/14

Fields of Expertise

  • Mobility & Production
  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)
  • Application
  • Experimental

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