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Analysis of Unsteady Motion with Respect to Noise Sources in a Gas Turbine Combustor: Isothermal Flow Case

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Abstract

In order to evaluate the direct and indirect contributions to the total combustion noise emission, a combustion chamber consisting of a swirl burner and an exit nozzle of Laval-shape, representing a gas turbine combustor, is investigated by means of experiments and large eddy simulation. Focused on the isothermal flow case first and encouraged by a good overall agreement between the LES and the experimental data for the flow field, a first characterisation of the flow with respect to noise sources is performed. To analyse acoustic properties of the flow, time and length scales are evaluated inside the combustor. Furthermore, the evidence for the existence of a precessing vortex core (PVC), typical for configurations with swirl, is revealed. Finally, the effect of the PVC on the flow inside the Laval nozzle is discussed.

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Authors and Affiliations

  1. Institute for Energy and Powerplant Technology, Darmstadt University of Technology, Petersenstr. 30, D-64287, Darmstadt, Germany

    F. Flemming, C. Olbricht, B. Wegner, A. Sadiki & J. Janicka

  2. DLR – Institute of Propulsion Technology, German Aerospace Center, Müller-Breslau-Str. 8, D-10623, Berlin, Germany

    F. Bake, U. Michel, B. Lehmann & I. Röhle

Authors
  1. F. Flemming
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  2. C. Olbricht
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  3. B. Wegner
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  4. A. Sadiki
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  5. J. Janicka
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  6. F. Bake
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  7. U. Michel
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  8. B. Lehmann
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  9. I. Röhle
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Correspondence to F. Flemming.

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Flemming, F., Olbricht, C., Wegner, B. et al. Analysis of Unsteady Motion with Respect to Noise Sources in a Gas Turbine Combustor: Isothermal Flow Case. Flow Turbulence Combust 75, 3–27 (2005). https://doi.org/10.1007/s10494-005-8577-2

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  • DOI: https://doi.org/10.1007/s10494-005-8577-2

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