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COMPARISON OF TWO STATISTICAL NARROW BAND MODELS FOR NON-GRAY GAS RADIATION IN PLANAR PLATES

DOI: 10.1615/ICHMT.2010.RAD-6.310
10 pages

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

Qiang Cheng
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518057, Guangdong, China

Huaichun Zhou
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, P. R. China; Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Tsinghua University, Beijing 10084, 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

Resumo

Non-gray gas radiation analysis and comparison are conducted by combining a ray tracing method and two statistical narrow band (SNB) spectral models, namely the Goody SNB model and the Malkmus SNB model. In this paper, gas radiation in real gas containing H2O, H2O/N2, or H2O/CO2/N2 mixtures at 1 atm in planar plates was studied. Comparisons between these models are performed using the latest narrow-band database. The present computations are validated by reproducing the published results in the literature. The radiative source term, the wall fluxes, the narrow-band radiation intensities along a line-of-sight and the computing time are all compared. From the comparisons, it is found that the Malkmus SNB model is somewhat superior to the Goody SNB model and the former is preferred in engineering application.

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