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Application of an optimized SLW model to calculation of non-gray radiation heat transfer in a furnace

Darbandi, M

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  1. Type of Document: Article
  2. DOI: 10.1115/IMECE2015-53213
  3. Abstract:
  4. The spectral line based weighted sum of gray gases (SLW) model is considered as an advanced model, which can solve the radiative transfer equation (RTE) in non-gray participating media by dividing the absorption cross section spectrum into a limited number of intervals. Each interval is then treated as a gray gas medium, in which the attributed RTE should be solved separately. Therefore, the SLW model would be computationally more efficient than the other non-gray participating media solvers because it is faced with a small number of RTE solutions. In this work, we present a novel optimized SLW model and applied it to radiation heat transfer calculation in a model furnace. The current optimized SLW model with only 3 gray gases can provide accuracy close to the line-by-line (LBL) method. This is while the classic nonoptimized SLW model cannot provide the same level of accuracy imposing only 3 gray gases. Therefore, we strongly recommend the optimized SLW model to calculate the radiation heat transfer in non-gray combustion gas mixtures
  5. Keywords:
  6. Absorption spectroscopy ; Gases ; Absorption cross sections ; Advanced modeling ; Combustion gas ; Participating media ; Radiation heat ; Radiative transfer equation(RTE) ; Spectral line ; Weighted-sum-of-gray-gases ; Heat transfer
  7. Source: ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), 13 November 2015 through 19 November 2015 ; Volume 8B-2015 , 2015 ; 9780791857502 (ISBN)
  8. URL: http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=2501106