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CALCULATIONS OF RADIATIVE HEAT TRANSFER IN AN AXISYMMETRIC JET DIFFUSION FLAME AT ELEVATED PRESSURES USING DIFFERENT METHODS

DOI: 10.1615/RAD-16.160
pages 125-133

Huaqiang Chu
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China; School of Energy and environment, Anhui University of Technology, Ma’anshan 243002, Anhui, China

Jean-Louis Consalvi
Aix-Marseille Université, IUSTI/ UMR CNRS 7343, 5 rue E. Fermi, 13453 Marseille Cedex 13, France

Mingyan Gu
School of Energy and Environment, Anhui University of Technology, Ma'anshan 243002, China

Fengshan Liu
National Research Council, Combustion Technology Group, Institute for Chemical Process & Environmental Technology, National Research Council Building M-9, 1200 Montreal Road, Ottawa, Ontario, Canada K1 A 0R6

Abstrakt

Radiation heat transfer in axisymmetric jet diffusion flames under conditions relevant to oxygen-enriched combustion at total pressures of 1 and 30 atm was calculated using several gas radiation models: line-by-line, narrow-band correlated-k, wide-band correlated-k, full-spectrum correlated-k, and weight-sum-of-grey-gases. An optimized full-spectrum correlated-k, an optimized narrow-band correlated-k, and a wide-band correlated-k model were proposed and evaluated. Line-by-line results are used as the benchmark solution in the evaluation of other gas radiation models. The optimized full-spectrum correlated-k model was found to improve significantly the computational efficiency to a level comparable to that of the weight-sum-of-gray-gases model without significant loss of accuracy.

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