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Anisotropic, isothermal, turbulent swirling flow in a complex combustor geometry
Author(s) -
Jones L. N.,
Gaskell P. H.,
Thompson H. M.,
Gu X. J.,
Emerson D. R.
Publication year - 2005
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.852
Subject(s) - turbulence , mechanics , anisotropy , flow (mathematics) , combustor , combustion chamber , vorticity , dissipation , physics , turbulence kinetic energy , closure (psychology) , isothermal flow , mean flow , reynolds stress , k epsilon turbulence model , moment (physics) , geometry , classical mechanics , vortex , mathematics , open channel flow , thermodynamics , optics , combustion , chemistry , organic chemistry , economics , market economy
The performance of popular second moment closure (LRR, SSG) turbulence models is assessed and compared against experimental data for anisotropic swirling flow in a cylindrical combustion chamber. In contrast to previous studies, where the dissipation anisotropy is correlated with the stress anisotropy, the benefit of approximating the former for swirling flows in terms of the mean strain and vorticity is investigated. Second moment closure models are found to predict mean and turbulent flow quantities reasonably well everywhere except near the wall. The anisotropic dissipation model is found to improve prediction of mean flow quantities near the chamber axis and acts to preserve turbulence further downstream. Copyright © 2005 John Wiley & Sons, Ltd.