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

In English

Författare

  • 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.

Publiceringsår

2007

Språk

Engelska

Sidor

11214-11226

Publikation/Tidskrift/Serie

Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting

Volym

16

Dokumenttyp

Konferensbidrag

Förlag

American Institute of Aeronautics and Astronautics

Ämne

  • Fluid Mechanics and Acoustics

Nyckelord

  • 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