The radiative heat transfer model

i.e.Discrete-Ordinates(DO) model

was verified by and applied to a combustion chamber and a three dimensional(3D) swirl combustor.For the combustion chamber

the predicted results of pure radiative heat transfer were in good agreement with those of the zone method

while the SHF model gave relatively large deviations.For swirl combustor

the predicted temperature distribution of DO model were in good agreement with those measured by experiment and were better than those of the SHF model.Also

the computation time and boundary treatment

the DO model was better than zone model and six heat flux model.