Open AccessA comparison of two statistical narrow band models for non-gray gas radiation in planar plates
Author(s) -
Huaqiang Chu,
Fei Ren,
Wei Yan
Publication year - 2018
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci171214063c
Subject(s) - radiation , radiative transfer , planar , gray (unit) , line of sight , computation , tracing , statistical model , computational physics , physics , optics , statistical physics , computer science , astrophysics , mathematics , statistics , algorithm , computer graphics (images) , medicine , radiology , operating system
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 reproduc- ing 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.