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Large eddy simulation of spray dispersion and mixing in a swirl stabilized gas turbine burner

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Author

  • Mirko Salewski
  • Christophe Duwig
  • Vladimir Milosavljevic
  • Laszlo Fuchs

Summary, in English

The dispersion of droplets and mixing of evaporated gases in a swirl stabilized gas turbine combustor are studied with an Eulerian / Lagrangian approach. The results are shown to be highly sensitive to the assumed droplet injection diameter. Injection of smaller droplet diameters lead to significantly higher local equivalence ratios and temperature drops, and increased gas phase densities, enhancing further the breakup of the droplets non-linearly. A spiraling rotational mode in the combustor, the precessing vortex core, leads to time-dependent local mixture fractions with bi-modal probability density functions. Small droplets and evaporated gases can enter the swirl generator intermittently with a frequency related to this rotational mode.

Publishing year

2007

Language

English

Pages

11214-11226

Publication/Series

Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting

Volume

16

Document type

Conference paper

Publisher

American Institute of Aeronautics and Astronautics

Topic

  • Fluid Mechanics and Acoustics

Keywords

  • Phase density
  • Spray dispersion
  • Temperature drop
  • Swirl generators

Conference name

45th AIAA Aerospace Sciences Meeting 2007

Conference date

2007-01-08 - 2007-01-11

Conference place

Reno, NV, United States

Status

Published