Reliable modeling depends on the accurate prediction of both velocity and temperature fields. The velocity and temperature fields of a propane diffusion flame combustor, with interior and exterior conjugate heat transfers, were first numerically studied. The results from three combustion models, together with the renormalization group (RNG) turbulence model and the discrete ordinates radiation model are discussed, and compared with comprehensive experimental measurements. The flow patterns and the recirculation zone length in the combustion chamber are excellently predicted, and the mean axial velocities are in fairly good agreement with the experimental data for all three combustion models. The mean temperature profiles are fairly well captured by the probability density function (PDF) and eddy dissipation (EDS) combustion models. However, the EDS-finite-rate combustion model fails to provide an acceptable temperature field. Based on the acceptable velocity and temperature fields, a number of NO modeling approaches were evaluated in a postprocessing mode. The partial-equilibrium approach of O and OH radical concentrations shows a significant effect on the thermal NO formation rate. In contrast, the prompt NO, the NO reburn mechanism and the third reaction of the extended Zeldovich mechanism have negligible effects on the overall NO formation in the present study. This study indicates that the semiempirical, postprocessing NO model can provide valuable NO simulations as long as the velocity and temperature fields are adequately predicted.
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e-mail: leiyong.jiang@nrc-cnrc.gc.ca
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July 2005
Technical Papers
A Critical Evaluation of NOx Modeling in a Model Combustor
Lei-Yong Jiang,
e-mail: leiyong.jiang@nrc-cnrc.gc.ca
Lei-Yong Jiang
Gas Turbine Environmental Research Center, Institute for Aerospace Research, National Research Council Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, Canada, K1A 0R6
Tel.: 613-993-9235
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Ian Campbell
Ian Campbell
Gas Turbine Environmental Research Center, Institute for Aerospace Research, National Research Council Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, Canada, K1A 0R6
Tel.: 613-993-9235
Search for other works by this author on:
Lei-Yong Jiang
Gas Turbine Environmental Research Center, Institute for Aerospace Research, National Research Council Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, Canada, K1A 0R6
Tel.: 613-993-9235e-mail: leiyong.jiang@nrc-cnrc.gc.ca
Ian Campbell
Gas Turbine Environmental Research Center, Institute for Aerospace Research, National Research Council Canada, 1200 Montreal Road, M-10, Ottawa, Ontario, Canada, K1A 0R6
Tel.: 613-993-9235Contributed by the International Gas Turbine Institute (IGTI) of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Paper presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Vienna, Austria, June 13–17, 2004, Paper No. 2004-GT-53641. Manuscript received by IGTI, October 1, 2003; final revision, March 1, 2004. IGTI Review Chair: A. J. Strazisar.
J. Eng. Gas Turbines Power. Jul 2005, 127(3): 483-491 (9 pages)
Published Online: June 24, 2005
Article history
Received:
October 1, 2003
Revised:
March 1, 2004
Online:
June 24, 2005
Citation
Jiang, L., and Campbell, I. (June 24, 2005). "A Critical Evaluation of NOx Modeling in a Model Combustor ." ASME. J. Eng. Gas Turbines Power. July 2005; 127(3): 483–491. https://doi.org/10.1115/1.1850508
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