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Subgrid Two-Phase Mixing and Combustion Modeling for Large-Eddy Simulations FREE

[+] Author Affiliations
Suresh Menon, Sreekanth Pannala

Georgia Institute of Technology, Atlanta, GA

Paper No. 98-GT-227, pp. V003T06A013; 8 pages
doi:10.1115/98-GT-227
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7864-4
  • Copyright © 1998 by ASME

abstract

A subgrid scalar mixing and combustion model originally developed for gas phase combustion has been extended to include the liquid phase. This approach includes a more fundamental treatment of the effects of the final stages of droplet vaporization, molecular diffusion, chemical reactions and small scale turbulent mixing than other LES closure techniques. As a result, Reynolds, Schmidt and Damkohler number effects are explicitly included. This model has been implemented within an Eulerian-Lagrangian two phase large-eddy simulation (LES) formulation. In this approach, the liquid droplets are tracked using the Lagrangian approach up to a pre-specified cut-off size. The evaporation of the Lagrangian droplets and the evaporation and mixing of the droplets smaller than the cutoff size is modeled within the subgrid using an Eulerian two-phase model. The issues related to the implementation of this subgrid model within the LES are discussed in this paper along with some preliminary results that demonstrate its capabilities.

Copyright © 1998 by ASME
This article is only available in the PDF format.

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