An Attempt at Large Eddy Simulation for Combustor Modeling



Leiyong Jiang *, Ian Campbell
Gas Turbine Laboratory, Institute for Aerospace Research, the National Research Council of Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, Canada, K1A 0R6


© 2012 Jiang and Campbell.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Gas Turbine Laboratory, Institute for Aerospace Research, the National Research Council of Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, K1A 0R6, Canada; Tel: 613- 993-9235; Fax: 613-952-7677; E-mail: leiyong.jiang@nrc-cnrc.gc.ca


Abstract

Large eddy simulation (LES) is a promising method for numerical simulation in combustion systems. A LES attempt in a model combustor has been made, and a few important issues related to grid size, inflow condition, wall boundary conditions, physical sub-models and data sampling are discussed. Some of the numerical results are presented and compared with a comprehensive experimental database, which indicates that LES can provide reasonable predictions for the mean axial velocity and temperature distributions inside the combustion chamber. However, in order to make LES a valuable and cost-effective tool in the development of advanced combustion systems, some fundamental questions remain to be addressed and more validation efforts are required. Moreover significant computing power is required for LES to capture both the high and low frequencies of interest in the present turbulent reacting flow.

Keywords: combustion, combustor modeling, gas turbine, large eddy simulation, thermal boundary, turbulence modeling.