Large eddy simulation of radiation effects on pollutant emissions in diluted turbulent premixed flames

Nunno, A. Cody, Grenga, Temistocle and Mueller, Michael E. (2016) Large eddy simulation of radiation effects on pollutant emissions in diluted turbulent premixed flames. 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, , Princeton, United States. 13 - 16 Mar 2016.

Record type: Conference or Workshop Item (Paper)

Abstract

Radiation effects are examined in turbulent premixed flames using a detailed Large Eddy Simulation (LES) approach. The approach combines a tabulated premixed flamelet model (Flamelet Generated Manifolds) with an optically thin radiation model. Radiation heat loss is tracked using a heat loss parameter in the tabulation. Heat loss in the flamelets is calculated by varying a coefficient on the radiation source term, ranging from zero (adiabatic) to unity (full optically thin model). NO_x is also modeled using a transport equation, which accounts for both chemical generation and loss. The model is compared against experimental measurements of methane-air piloted turbulent premixed planar jet flames with increasing levels of water and carbon dioxide dilution but which maintains a constant adiabatic flame temperature. The effects of dilution on global flame structure and NO emissions resulting directly and indirectly from radiation are examined in detail.

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Published date: 2016

Additional Information: Funding Information: The authors gratefully acknowledge funding from the U.S. Department of Energy, National Energy Technology Laboratory through the University Turbine Systems Research Program. Publisher Copyright: © 2016, Eastern States Section of the Combustion Institute. All rights reserved.

Venue - Dates: 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, , Princeton, United States, 2016-03-13 - 2016-03-16