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Three-Component Laser-Doppler Measurements of the Confined Model Flow Behind a Swirl Nozzle

  • B. Lehmann
  • C. Hassa
  • J. Helbig
Conference paper

Abstract

Results are reported of three-component laser-Doppler measurements in the highly complex flow field behind a model nozzle as used for the atomization of liquid fuel in gas turbines. The flow field consists of two concentric air streams leaving a concentric dual nozzle system both with slightly different but equally directed swirls. The outer ring flow forms a 1 mm thick ring film which interacts strongly with the inner flow and the surrounding flow field.

Mean and rms velocities were measured as well as double and triple cross-correlations of the three velocity components. Frequency analysis exhibited a strong coherent fluctuation of the radial velocity component near the nozzle exit. The measured data are needed to improve atomization and combustion effectiveness and for numerical modelling of the flow.

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • B. Lehmann
    • 1
  • C. Hassa
    • 2
  • J. Helbig
    • 1
  1. 1.Abt. TurbulenzforschungDeutsche Forschungsanstalt für Luft-und Raumfahrt (DLR) e.V. Institut für AntriebstechnikBerlinGermany
  2. 2.Abt. Aerothermodynamik und VerbrennungDeutsche Forschungsanstalt für Luft-und Raumfahrt (DLR) e.V. Institut für AntriebstechnikKölnGermany

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