DOI: 10.1615/ICHMT.2001.RadiationSymp
ISBN Print: 978-1-56700-163-1
ISSN Online: 2642-5629
ISSN Flash Drive: 2642-5661
NON-GRAY GAS MODELING IN COMPLEX ENCLOSURES: APPLICATION OF THE HYBRID SNB-CK METHOD
ABSTRAKT
This study compares the relative efficiencies (accuracy and computation time) of three versions of the hybrid CK/statistical narrow band method (SNB-CK) for characterizing radiative exchanges in enclosures containing a mixture of non-gray gases (CO2 and H2O). One of these versions, which is characterized by a selective regrouping of bands, leads to very good results while the computation time is significantly decreased with respect to the original SNB-CK version. Complex 2D cases, close to real combustion chambers, are analysed. These cases include irregular geometry and non-uniform concentration and temperature fields. The radiative transfer equation is solved by the discrete ordinates method. The importance of the presence of CO as a third component is also assessed.