Open AccessAn Attempt at Large Eddy Simulation for Combustor Modeling
Author(s) -
Leiyong Jiang,
Ian G. Campbell
Publication year - 2012
Publication title -
the open aerospace engineering journal
Language(s) - English
Resource type - Journals
ISSN - 1874-1460
DOI - 10.2174/1874146001205010001
Subject(s) - combustor , large eddy simulation , combustion , turbulence , inflow , combustion chamber , computer simulation , flow (mathematics) , mechanics , grid , computer science , boundary value problem , meteorology , mechanical engineering , aerospace engineering , environmental science , simulation , engineering , physics , geology , chemistry , organic chemistry , geodesy , quantum mechanics
Large eddy simulation (LES) is a promising method for numerical simulation in combustion systems. A LESattempt in a model combustor has been made, and a few important issues related to grid size, inflow condition, wallboundary conditions, physical sub-models and data sampling are discussed. Some of the numerical results are presentedand compared with a comprehensive experimental database, which indicates that LES can provide reasonable predictionsfor the mean axial velocity and temperature distributions inside the combustion chamber. However, in order to make LESa valuable and cost-effective tool in the development of advanced combustion systems, some fundamental questionsremain to be addressed and more validation efforts are required. Moreover significant computing power is required forLES to capture both the high and low frequencies of interest in the present turbulent reacting flow.