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LES of Reacting Flows in an Industrial Gas Turbine Combustor

Accepted version
Peer-reviewed

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Article

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Authors

Chen, Zhi X 
Swaminathan, N 
Sadasivuni, Suresh K 

Abstract

The turbulent reacting flow in an industrial gas turbine combustor operating at 3 bar is computed using LES paradigm. The subgrid scale (SGS) combustion is modelled using a collection of unstrained premixed flamelets including mixture stratification. The non-premixed combustion mode is also included using a simple closure involving the scalar dissipation rate of the mixture fraction. A close attention is paid to maintain physical consistencies among sub-closure models for combustion and these consisten- cies are discussed on a physical basis. The importance of non-premixed mode and SGS mixture fraction fluctuations are investigated systematically. The results show that the SGS mixture fraction variance plays an important role and comparisons to measure- ments improve when contributions from the premixed and non-premixed modes are included. These numerical results and observations are discussed on a physical basis along with potential avenues for further improvements.

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Journal Title

Journal of Propulsion and Power

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Publisher

American Institute of Aeronautics and Astronautics

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Sponsorship
Engineering and Physical Sciences Research Council (EP/I027556/1)