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Center for Turbulence Research Annual Research Briefs 2002

Summary: Center for Turbulence Research
Annual Research Briefs 2002
Progress toward large-eddy simulation of
turbulent reacting and non-reacting flows in
complex geometries
By K. Mahesh , G. Constantinescu, S. Apte,
G. Iaccarino, F. Ham AND P. Moin
1. Motivation and objectives
The large-eddy simulation (LES) approach is used to simulate the combustor of the gas
turbine engine. LES was chosen because of its demonstrated superiority over RANS in
predicting mixing, which is central to combustion. The combustor simulations have two
major components - gas phase and sprays. The gas phase part of the project has devel-
oped a parallel, unstructured grid LES solver which has now been completely integrated
with the spray module. As discussed in previous reports (Mahesh et al. 2000, 2001) the
gas phase solver is non-dissipative and discretely conserves energy, thus insuring both
accuracy and robustness for high Reynolds number simulations in complex geometries.
A dynamic procedure is used to compute the coefficients in the additional terms that
are present in the filtered momentum and scalar-transport equations. The objective of
this work is to develop unstructured mesh technology for LES of reacting flow (including


Source: Apte, Sourabh V. - School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University
Mahesh, Krishnan - Department of Aerospace Engineering and Mechanics, University of Minnesota


Collections: Engineering