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Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Radiation Benchmarking in a Model Combustor

[+] Author and Article Information
Lei-Yong Jiang1

Gas Turbine Laboratory, Institute for Aerospace Research, National Research Council of Canada, 1200 Montreal Road, M-10, Ottawa, ON, K1A 0R6, Canadaleiyong.jiang@nrc-cnrc.gc.ca

Ian Campbell

Gas Turbine Laboratory, Institute for Aerospace Research, National Research Council of Canada, 1200 Montreal Road, M-10, Ottawa, ON, K1A 0R6, Canada

1

Corresponding author.

J. Eng. Gas Turbines Power 131(1), 011501 (Oct 06, 2008) (6 pages) doi:10.1115/1.2966417 History: Received March 28, 2008; Revised March 31, 2008; Published October 06, 2008

Radiation heat transfer in a model combustor with interior and exterior conjugate heat transfers has been numerically studied. The previous investigations on turbulence, combustion, and scalar transfer modeling (Reynolds analogy), and comparisons with a comprehensive experimental database provide a reliable base to evaluate the effect of radiation heat transfer on the flow field and NO emission in the combustor. Some of the numerical results with and without radiation are presented and compared with the experimental measurements. It is found that the total radiation heat flux through the combustor wall is about 4.2% of the total energy released from the input fuel. The effect of radiation on the flow field is minor, particularly to the velocity field. In contrast, it has significant effects on the NO field, where the predicted values without radiation are two times higher than those with radiation or the experimental data. A considerable effect of radiation on the combustor wall temperature is also observed. In summary, to provide valuable predictions of NO emission and combustor liner temperature, the radiation heat transfer should be properly taken into account in numerical simulations.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

The model combustor

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Figure 2

Computational domain and exterior wall temperature

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Figure 3

Axial velocity profiles along the combustor centerline

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Figure 4

Temperature profiles along the combustor centerline

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Figure 5

Temperature profiles along the combustor wall

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Figure 6

Comparison between the predicted and measured NO contours with radiation

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Figure 7

Comparison between the predicted and measured NO contours without radiation

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Figure 8

NO profiles at cross sections, x=51–291 mm

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