The influence of heat transfer due to radiation heat transfer from a combustion chamber

Combustion process in industrial furnaces remains a challenging research subject. To achieve a realistic model and analyze the influences of heat transfer due to radiation in a combustion process, various phenomena must be examined, such as the hydrodynamic properties of the fuel, two-phase turbulent flow, and chemical reactions, which occur in the turbulent environment. A proper study of the processes mentioned above leads to the correct analysis of the process and a reduction of emissions and the homogeneous temperature, and more importantly, it helps to reduce fuel consumption. This research has solved combustion equations by the flame-let and Arrhenius one-step equation model, and also heat transfer due to radiation mechanism by the Discrete Ordinates Method (DOM) equations with a gray gas hypothesis. Modeling is based on OpenFoam software, and results are validated with previous works. Results show that changes in water vapor and carbon dioxide concentration lead to change in heat transfer due to radiation, and the combustion process of oxygen with an extra percentage will radically reduce the chamber temperature compared to the combustion with air. By assuming the gray gas hypothesis, the effects of radiation heat transfer on gas and wall heat flux are between 10% to 68% and 10% to 40%, respectively. This work matches the experimental results more accurately than previously reported models.