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CALCULATIONS OF THERMAL RADIATION TRANSFER OF C2H2 AND C2H4 TOGETHER WITH H2O, CO2, AND CO IN A ONE-DIMENSIONAL ENCLOSURE USING LBL AND SNB MODELS

DOI: 10.1615/RAD-16.250
pages 202-209

Chaobo Qi
Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Shu Zheng
Department of Thermal Engineering, Tsinghua University, Beijing 100084, China; North China Electric Power University, Beijing 102206, China; Princeton University, Princeton, NJ 08544, USA

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

Abstrakt

The Statistical Narrow-Band model parameters for C2H2 and C2H4 are generated. The distributions of the concentrations of radiating gases and the temperature along the centerline of a laminar ethylene/air diffusion flame were chosen to be tested. Thermal radiation transfer in the one-dimensional planar enclosure was calculated using the line-by-line model and the Statistical Narrow-Band model, and the results of these two models show good agreements. Below the height of 1.8 cm, the average fraction contributed by C2H2 and C2H4 in the radiative heat source is 38.6%, while that by CO is only 5.5%. This result indicates that the involvement of C2H2 and C2H4 in radiation heat transfer should be taken into account in the numerical modelling of the ethylene/air diffusion flame, especially in the early stage of combustion.

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