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Sustained multi-kHz flamefront and 3-component velocity-field measurements for the study of turbulent flames

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Abstract

We describe an approach of imaging the dynamic interaction of the flamefront and flowfield. Here, a diode-pumped Nd:YLF laser operating at 5 kHz is used to pump a dye laser, which is then frequency doubled to 283 nm to probe flamefront OH, while a dual cavity diode-pumped Nd:YAG system produces pulse-pairs for particle image velocimetry (PIV). CMOS digital cameras are used to detect both planar laser-induced fluorescence (PLIF) and particle scattering (in a stereo arrangement) such that a 5 kHz measurement frequency is attained. This diagnostic is demonstrated in lifted-jet and swirl-stabilized flames, wherein the dynamics of the flame stabilization processes are seen. Nonperiodic effects such as local ignition and/or extinction, lift-off and flashback events, and their histories can be captured by this technique. As such, this system has the potential to significantly extend our understanding of nonstationary combustion processes relevant to industrial and technical applications.

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Authors and Affiliations

  1. Institut für Verbrennungstechnik, Deutsches Zentrum für Luft-und Raumfahrt (DLR), Pfaffenwaldring 38-40, 70569, Stuttgart, Germany

    I. Boxx, M. Stöhr & W. Meier

  2. Air Force Research Laboratory (AFRL)/RZAS, 1950 Fifth St, Wright-Patterson AFB, OH, USA

    C. Carter

Authors
  1. I. Boxx
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  2. M. Stöhr
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  3. C. Carter
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  4. W. Meier
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Correspondence to I. Boxx.

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Boxx, I., Stöhr, M., Carter, C. et al. Sustained multi-kHz flamefront and 3-component velocity-field measurements for the study of turbulent flames. Appl. Phys. B 95, 23–29 (2009). https://doi.org/10.1007/s00340-009-3420-4

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  • DOI: https://doi.org/10.1007/s00340-009-3420-4

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